710 Numbering Plan Area (NPA) for the U.S. Government
Event typeOther
RegionAR
Latest letter2023-01-26
Primary documents
| Letter | Published | Subject |
|---|---|---|
| PL-609 | 2023-01-26 | 710 Numbering Plan Area (NPA) for the U.S. Government |
| PL-556 | 2021-01-08 | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Lifeline) – supersedes PL-544 |
| PL-555 | 2020-12-23 | Assignment of 943 to overlay 404/470/678/770 (Georgia) |
| PL-548 | 2020-10-29 | NANPA Planning Letter 548, 800-855 number management |
| PL-546 | 2020-08-20 | 757 and 948 All-Services Overlay (Virginia) – amending PL536 |
| PL-544 | 2020-08-17 | Transition to 10-digit dialing (for 988 as 3-digit access to National Suicide Prevention Hotline |
| PL-513 | 2017-11-27 | Sunset of the Inbound International NPA (INT/NPA/NXX) Assignment Guidelines. |
| PL-506 | 2017-04-26 | Implementation of the 833 NPA for Toll-Free Services |
| PL-498 | 2016-10-31 | Sunset of the 555 NXX Resource |
| PL-483 | 2015-06-19 | Moratorium on 555 Line Number Assignments and Requirement to Provide Information on Current 555 Assignments |
| PL-465 | 2014-03-07 | 710 Numbering Plan Area (NPA) for the U.S. Government |
| PL-455 | 2013-08-05 | Implementation of the 844 NPA for Toll-Free Services |
| PL-452 | 2013-05-08 | Implementation of the 844 NPA for Toll-Free Services |
| PL-437 | 2012-06-25 | Suspension of 870/327 NPA Relief (Arkansas) |
| PL-427 | 2011-10-10 | NPA Code 667 to Overlay NPA Code 410/443 (Maryland) |
| PL-425 | 2011-08-12 | NPA Code 873 to Overlay NPA Code 819 (Western Quebec, Canada) |
| PL-380 | 2008-09-03 | Reminder to update networks with the new 575 NPA for the 505 NPA Split in New Mexico |
| PL-360 | 2007-04-16 | Louisiana 504/985 RCC and NPA Boundary Realignment |
| PL-345 | 2005-07-22 | Change of Test Number 809/829 Overlay (Dominican Republic) |
| PL-344 | 2005-06-23 | PA 835 Implementation for 484/610 NPA Rescinded - 835 NPA Code Reclaimed |
| PL-339 | 2004-08-20 | CA 909/951 NPA Split-Reminder Planning Letter |
| PL-337 | 2004-06-23 | Utah 801-385 Split Suspended |
| PL-336 | 2004-06-18 | New York 716 NPA Split - Wireless Extended Permissive Dialing Ends |
| PL-334 | 2003-12-12 | 909 NPA; 2-way Split, Creating 951 NPA California |
| PL-332 | 2003-09-24 | PA 445 Implementation for 215/267 NPA Rescinded - 445 NPA Code Reclaimed |
| PL-331 | 2003-06-02 | Recovery of NPA Codes 880, 881, 882 (Paid Toll-Free Service) Scheduled for April 1, 2004 |
| PL-329 | 2003-03-03 | Non-Dialable Toll Points Release of NPA Codes 886 and 889 on July 1, 2003 |
| PL-328 | 2002-11-25 | 505 NPA; Petition for Approval of Relief Plan Dismissed - New Mexico |
| PL-327 | 2002-10-29 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for the 812 NPA (Indiana) |
| PL-326 | 2002-10-22 | 801 NPA; 2-way Split Creating 385, Delayed until March 2005 (Utah) |
| PL-325 | 2002-06-03 | 689 NPA Implementation Suspended (Central Florida) |
| PL-324 | 2002-04-30 | Revised Dialing Plan for the 616 and 269 NPAs (Michigan) |
| PL-323 | 2002-04-30 | 689 NPA To Overlay 407 and 321 NPAs (Central Florida) |
| PL-322 | 2002-04-24 | 915 NPA Split, Creating 432 and 325 NPAs (Texas) |
| PL-321 | 2002-04-12 | Supplemental Information NPA Overlay 954/754 NPA (Southeast Florida) |
| PL-320 | 2002-03-29 | Mandatory Dialing Postponed - 248/947 NPA Overlay (Michigan) |
| PL-319 | 2002-03-28 | 540/276 NPA Split - Extended Permissive For Additional Wireless Codes (Virginia) |
| PL-318 | 2002-03-27 | Supplemental Information NPA Overlay 954/754 NPA (Southeast Florida) |
| PL-317 | 2002-03-25 | Suspension of 614/380 NPA Overlay (Ohio) |
| PL-316 | 2002-03-25 | Suspension of 513/283 NPA Overlay (Ohio) |
| PL-314 | 2002-02-14 | New York 212/646, 718/347 and 917 Mandatory 10D Dialing Implementation |
| PL-312 | 2002-01-11 | 505 NPA Split Suspended (New Mexico) |
| PL-311 | 2001-11-20 | 561 NPA Split, Creating 772 NPA (Florida) |
| PL-310 | 2001-11-15 | Revised Dialing Plan for the 501 and 479 NPAs (Arkansas) |
| PL-309 | 2001-10-31 | Amended 219 NPA Split Creating 574 and 260 NPAs (Indiana) |
| PL-308 | 2001-10-29 | Delayed Introduction of the 385 NPA (Utah) |
| PL-307 | 2001-10-26 | 941NPA Split, Creating 239 NPA (Southwest Florida) |
| PL-306 | 2001-10-19 | 919/984 NPA Overlay Deferred (North Carolina) |
| PL-305 | 2001-10-17 | Mandatory Dialing Date Established for NPAs 847 and 224 (Illinois) |
| PL-304 | 2001-10-05 | Suspension Relief in the 816 NPA (Missouri) |
| PL-303 | 2001-10-05 | Suspension of the 314 NPA Relief (Missouri) |
| PL-302 | 2001-09-26 | Amended 501 NPA Split Creating 479 NPA (Arkansas) |
| PL-301 | 2001-09-11 | 504/985 Split - Extended Permissive Dialing for Wireless (Louisiana) |
| PL-300 | 2001-09-11 | Extended Permissive Dialing Ends for 516/631 NPAs (New York) |
| PL-299 | 2001-09-04 | Rationing in NPAs 410, 443, and 667 (Maryland) |
| PL-298 | 2001-08-29 | Suspension of 564 Overlay (Washington) |
| PL-297 | 2001-08-17 | Revison of PL-290; Creating 380 NPA (Ohio) |
| PL-296 | 2001-08-17 | 219 NPA Split; Creating 574 and 260 NPA's (Indiana) |
| PL-295 | 2001-08-16 | 501 NPA Split; Creating 479 NPA (Arkansas) |
| PL-294 | 2001-08-07 | 616 NPA Split; Creating 269 NPA (Michigan) |
| PL-293 | 2001-08-06 | Supplemental Information NPA Overlay 787/939 (Puerto Rico) |
| PL-292 | 2001-08-06 | 505 NPA Split, Creating 575 NPA (New Mexico) |
| PL-289 | 2001-07-16 | Suspension of 205/659 NPA Relief (Alabama) |
| PL-288 | 2001-07-13 | Supplemental Information NPA SPLIT 912/478/229 Georgia |
| PL-287 | 2001-07-12 | Permissive Seven or Ten Digit Dialing 305 NPA (Keys Area) |
| PL-285 | 2001-06-07 | Correction 540/276 NPA Split (Virginia) |
| PL-282 | 2001-06-05 | 810 / 586 NPA Split (Michigan) - Wireless NXX Grandfathering |
| PL-281 | 2001-05-14 | Rationing in NPAs 412, 724, and 878 (Pennsylvania) |
| PL-278 | 2001-05-07 | Correction to PL 270, 716-585 Split (New York) |
| PL-276 | 2001-05-02 | Suspension of 512/737 NPA Relief (Texas) |
| PL-275 | 2001-05-01 | 540 NPA Split; Creating 276 NPA (Virginia) |
| PL-274 | 2001-04-30 | Correction to the Dialing Plan for NPAs 445 and 835 (Pennsylvania) |
| PL-273 | 2001-04-30 | 810 / 586 NPA Split - Wireless NXX Grandfathering (Michigan) |
| PL-270 | 2001-04-17 | 716 NPA Split, Creating 585 NPA (New York) |
| PL-268 | 2001-03-27 | 520 NPA Split, Creating 928 NPA (Arizona) |
| PL-267 | 2001-03-20 | Deferral of the 445 and 835 Overlay NPAs (Pennsylvania) |
| PL-265 | 2001-03-01 | 810 NPA Split, Creating 586 NPA (Michigan) |
| PL-263 | 2001-02-27 | Country Code 670 Assigned to East Timor |
| PL-260 | 2001-01-29 | DeBary Rate Center Moves from 407 NPA to 386 NPA (Florida) |
| PL-257 | 2001-01-22 | 804 NPA Split; Creating 434 NPA (Virginia) |
| PL-255 | 2001-01-03 | Update on the Introduction of NPAs 475 and 959 (Connecticut) |
| PL-254 | 2001-01-02 | 334 NPA Split, Creating 251 NPA (Alabama) |
| PL-253 | 2001-01-02 | 319 NPA Split, Creating 563 NPA (Iowa) |
| PL-252 | 2000-12-29 | 904 NPA Split, Creating 386 NPA (Northeast Florida) |
| PL-251 | 2000-11-21 | Revised Permissive Dialing Period for the 517 / 989 (MI) NPA Split |
| PL-250 | 2000-11-10 | 310 NPA Splits, Creating 424 NPA (California) |
| PL-248 | 2000-11-06 | 801 NPA Split Delayed (Utah) |
| PL-247 | 2000-10-30 | 901 NPA Split, Creating 731 NPA (Tennessee) |
| PL-245 | 2000-10-26 | 316 Numbering Plan Area (NPA) Split, Creating 620 NPA (Kansas) |
| PL-244 | 2000-10-26 | 517 NPA Split, Creating 989 NPA (Michigan) |
| PL-242 | 2000-10-20 | 504 NPA Split, Creating 985 NPA (Louisiana) |
| PL-241 | 2000-10-12 | Correction to Assignment Procedures for the Remaining Central Office Codes in 215 and 267 NPAs, and in the 610 and 484 NPAs (Pennsylvania) |
| PL-240 | 2000-09-19 | Urgent Reminder: Mandatory Dialing for Wireless Codes in the 337 NPA (Louisiana) |
| PL-238 | 2000-07-27 | Suspension of Splits of the 707 & 760 NPAs (California) |
| PL-232 | 2000-06-07 | Revised Mandatory Dialing Date for the 914/845 Split (New York) |
| PL-231 | 2000-05-31 | 801 NPA Split, Creating 385 NPA (Utah) |
| PL-230 | 2000-05-31 | Suspension of 619 / 935 NPA Split (California) |
| PL-228 | 2000-04-24 | 515 NPA Split, Creating New 641 NPA (Iowa) |
| PL-227 | 2000-04-24 | Suspension of Relief in the 248, 313 and 734 NPAs (Michigan) |
| PL-226 | 2000-04-20 | Suspension of Relief in the 517 NPA (Michigan) |
| PL-225 | 2000-04-19 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for the 541 NPA (Oregon) |
| PL-224 | 2000-04-17 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for the 901 NPA (Tennessee) |
| PL-223 | 2000-03-31 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for the 678 NPA (Georgia) |
| PL-212R | 2000-03-20 | 517 NPA Split, Creating 989 NPA (Michigan) |
| PL-221 | 2000-03-10 | Suspension of Code Assignments in the 586 NPA Michigan |
| PL-220 | 2000-03-02 | Introduction of Interchangeable Central Office Codes in the 808 NPA (Hawaii) |
| PL-216 | 2000-02-24 | Permissive Dialing Extended for Eleven Central Office Codes in the 602 NPA (Arizona) |
| PL-215 | 2000-02-24 | 909/951 NPA Split Suspended Temporarily (California) |
| PL-214 | 2000-02-23 | NPA Codes 844, 833, 822 Assigned for Toll Free Service |
| PL-211 | 2000-02-09 | 914 NPA Split, Creating 845 NPA (New York) |
| PL-210 | 2000-02-01 | 707 NPA Splits, Creating 369 and 627 NPAs (California) |
| PL-208 | 2000-01-21 | Extraordinary NPA - Specific Jeopardy Conservation Procedures Announced for the 787 NPA (Puerto Rico) |
| PL-207 | 2000-01-21 | Extraordinary NPA - Specific Jeopardy Conservation Procedures Announced for the 540 NPA (Virginia) |
| PL-206 | 2000-01-14 | Overlays Suspended in the 408, 415, 510, 650, 714 & 909 NPAs |
| PL-205 | 1999-12-29 | 606 NPA Split, Creating 859 NPA - Kentucky |
| PL-203 | 1999-12-10 | Permissive Dialing Extended for the 503 / 971 Concentrated Overlay (Oregon) |
| PL-202 | 1999-12-06 | 912 NPA split, Creating 229 and 478 NPAs - Georgia |
| PL-201 | 1999-12-06 | 409 NPA split, Creating 936 and 979 NPAs - Texas |
| PL-200 | 1999-11-29 | 612 NPA split, Creating 763 and 952 (Minnesota) |
| PL-199 | 1999-11-29 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 484 and 610 NPAs (Pennsylvannia) |
| PL-198 | 1999-11-29 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 412 NPA (Pennsylvannia) |
| PL-197 | 1999-11-29 | Assignment of NPA codes 866 and 855 for Toll-Free Service |
| PL-196 | 1999-10-29 | NANP- Overlay of 360 Numbering Plan Area (NPA) with 564 NPA (Washington) |
| PL-194 | 1999-10-24 | NANP- Split of 760 Numbering Plan Area (NPA) with 442 NPA - California |
| PL-193 | 1999-10-24 | NANP- Overlay of 650 Numbering Plan Area (NPA) with 764 NPA - California |
| PL-192 | 1999-09-02 | NANP - Overlay of 810 Numbering Plan Area (NPA) with 586 NPA - Michigan |
| PL-191 | 1999-08-26 | NANP- Overlay of 415 Numbering Plan Area (NPA) with 628 NPA - California |
| PL-190 | 1999-08-26 | NANP- Overlay of 510 Numbering Plan Area (NPA) with 341 NPA - California |
| PL-189 | 1999-08-26 | NANP- Split of 909 Numbering Plan Area (NPA) with 951 NPA and subsequent Overlay of 909 Numbering Plan Area (NPA) with 752 NPA - California |
| PL-187 | 1999-07-28 | Urgent Reminder: Mandatory dialing for the Louisiana 225/504 Wireless Codes |
| PL-186 | 1999-07-27 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 817 NPA (Texas) |
| PL-184 | 1999-07-22 | Geographic Split of 516 (New York) Numbering Plan Area (NPA); addition of 631 NPA |
| PL-183 | 1999-07-22 | Geographic Split of 423 (Tennessee) Numbering Plan Area (NPA); addition of 865 NPA |
| PL-182 | 1999-07-21 | Concentrated Overlay of 503 (Oregon) NPA with 971 NPA |
| PL-181 | 1999-07-21 | Urgent reminder to update networks for the 602 NPA Split in Phoenix, Arizona with the new 623 and 480 NPAs |
| PL-180 | 1999-07-19 | Geographic Split of 941 (Florida) Numbering Plan Area (NPA); addition of 863 NPA |
| PL-179 | 1999-06-01 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 704 NPA (North Carolina) |
| PL-178 | 1999-06-01 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 810 NPA (Michigan) |
| PL-177 | 1999-06-01 | Overlay of 703 (Virginia) Numbering Plan Area (NPA) |
| PL-176 | 1999-05-11 | Urgent reminder to Industry to update networks for the 403 NPA Split in Alberta, Canada with new 780 NPA |
| PL-175 | 1999-05-07 | Overlay of 212 (New York) Numbering Plan Area (NPA) |
| PL-174 | 1999-05-06 | Geographic Split of 414 (Wisconsin) Numbering Plan Area (NPA); addition of 262 NPA |
| PL-173 | 1999-05-05 | Geographic Split of 609 (New Jersey) Numbering Plan (NPA); addition of 856 NPA |
| PL-172 | 1999-04-26 | 710 Numbering Plan Area (NPA) for the U.S. Government |
| PL-171 | 1999-04-22 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 561 NPA (Florida) |
| PL-170 | 1999-04-22 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 954 NPA (Florida) |
| PL-169 | 1999-04-22 | NANP Overlay of 714 NPA with 657 NPA in Southern California |
| PL-168 | 1999-04-07 | NANP Split Boundary Extension Concentrated Overlay of 407 (Florida) NPA with 321 NPA |
| PL-167 | 1999-03-11 | Geographic Split of 616 (Michigan) Numbering Plan Area (NPA) |
| PL-166 | 1999-03-04 | Geographic Split of 601 (Mississippi) Numbering Plan Area (NPA) |
| PL-165 | 1999-02-23 | Geographic Split of 314 (Missouri) Numbering Plan Area (NPA) |
| PL-164 | 1999-02-23 | Update of Jeopardy Procedures for Numbering Plan Area (NPA) 314 in Missouri; this notice updates PL-147 |
| PL-163 | 1999-02-23 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 603 NPA (New Hampshire) |
| PL-162 | 1999-02-23 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 716 NPA (New York) |
| PL-161 | 1999-02-23 | Reminder of July 1, 1999 date for the Introduction of the 469 NPA for Dallas, Texas to overlay existing 214/972 NPAs; Please refer to PL-142 |
| PL-160 | 1999-02-23 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 760 NPA (California) |
| PL-159 | 1999-02-23 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 707 NPA (California) |
| PL-158 | 1999-02-23 | Update of Jeopardy Procedures for Numbering Plan Area (NPA) 512 in Texas; this notice updates PL-099 |
| PL-156 | 1999-02-22 | Mandatory dialing for the Louisiana 225/504 Wireless Codes; update to PL-123 |
| PL-155 | 1999-02-01 | NANP-Split of 502 Numbering Plan Area (NPA) in Kentucky |
| PL-154 | 1999-02-01 | NANP - Split of 512 (Texas) Numbering Plan Area (NPA) |
| PL-153 | 1999-02-01 | NANP-Split of the 602 (Arizona) Numbering Plan Area (NPA) and the Addition of the 480 and 623 NPA's |
| PL-149 | 1999-01-25 | NANP- Overlay of 408 Numbering Plan Area (NPA) with 669 NPA - California |
| PL-148 | 1999-01-08 | Reissue of the 403 NPA Split in Alberta, Canada, to add new Test Numbers, NXX listing, and Permissive Dialing Dates (first issued in PL-084 on September 2, 1998.) |
| PL-147 | 1998-11-23 | Jeopardy Declared for 314 in Missouri |
| PL-146 | 1998-11-18 | Introduction of Interchangeable Central Office Codes in Nebraska |
| PL-144 | 1998-10-19 | Extraordinary NPA-Specific Conservation Procedures for 403 NPA in Alberta |
| PL-142 | 1998-10-15 | Elimination of 214/972 Split Line and Introduction of 469 Overlay for Dallas, Texas |
| PL-137 | 1998-10-05 | Extraordinary Jeopardy Procedures for 714 NPA in California |
| PL-139 | 1998-10-05 | Automatic Number Identification Digits (ANI II) for Pay Phone Compensation |
| PL-138 | 1998-10-05 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for Connecticut NPAs 203 & 860 |
| PL-136 | 1998-07-31 | NANP-Split of 717 (Pennsylvania) Numbering Plan Area (NPA) |
| PL-135 | 1998-07-31 | NANP-Overlay of 610 (Pennsylvania) Numbering Plan Area (NPA) with 484 NPA |
| PL-134 | 1998-07-31 | NANP-Overlay of 215 (Pennsylvania) Numbering Plan Area (NPA) with 267 NPA |
| PL-133 | 1998-07-29 | Reminder notification for Numbering Plan Area (NPA) 813 (Florida) Permissive dialing beginning July 1, 1998 |
| PL-132 | 1998-07-24 | Extraordinary Jeopardy Procedures for 616 NPA in Michigan |
| PL-131 | 1998-07-24 | Extraordinary Jeopardy Procedures for 601 NPA in Mississippi |
| PL-130 | 1998-07-24 | Extraordinary Jeopardy Procedures for 818 NPA in California |
| PL-129 | 1998-07-24 | Extraordinary Jeopardy Procedures for 650 NPA in California |
| PL-128 | 1998-06-30 | NANP-Phased three-way split of 619 (California) Numbering Plan Area (NPA) with 858 & 935 NPAs |
| PL-127 | 1998-06-30 | NANP-Overlay of 847 (Illinois) Numbering Plan Area (NPA) with 224 NPA |
| PL-126 | 1998-06-12 | Extension of Permissive Dialing Period for Utah 801 and 435 NPA Relief; Reference PL-NANP-065 |
| PL-123 | 1998-06-09 | NANP-Split of 504 (Louisiana) Numbering Plan Area (NPA) |
| PL-122 | 1998-06-09 | Extraordinary Jeopardy Procedures for 508, 617, 781 and 978 Numbering Plan Area (NPA) in Massachusetts |
| PL-125 | 1998-05-26 | NANP-Overlay of 310 (California) Numbering Plan Area (NPA) with 424 NPA |
| PL-124 | 1998-05-26 | Extraordinary Jeopardy Procedures for 914 Numbering Plan Area (NPA) in New York |
| PL-121 | 1998-04-21 | NANP Split of 813 (Florida) Numbering Plan Area (NPA); This supersedes PL-NANP-109 that advised of an 813 NPA Overlay. |
| PL-120 | 1998-04-21 | NANP Split of 612 (Minnesota) Numbering Plan Area (NPA) |
| PL-119 | 1998-04-09 | Notification of Assignment of 882 NPA for Inbound Foreign Billed Calls to Toll-Free Numbers |
| PL-118 | 1998-03-25 | NANP-Split of 702 (Nevada) Numbering Plan Area (NPA) |
| PL-117 | 1998-03-24 | NANP-Overlay of 303 (Colorado) Numbering Plan Area (NPA) with 720 NPA |
| PL-116 | 1998-03-06 | NANP-Concentrated Overlay of 305 Numbering Plan Areas (NPA) in Florida |
| PL-115 | 1998-03-02 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 909 NPA (California) |
| PL-114 | 1998-03-02 | BellSouth Operation Support Systems Update and the Alabama and North Carolina NPA Splits |
| PL-112 | 1998-02-27 | NANP-Split of 919 (North Carolina) Numbering Plan Area (NPA) |
| PL-111 | 1998-02-12 | NANP-Split of 805 (California) Numbering Plan Area (NPA) |
| PL-110 | 1998-02-03 | NANP-Split of 205 (Alabama) Numbering Plan Area (NPA) |
| PL-105 | 1998-01-08 | NANP-Split of 704 (North Carolina) Numbering Plan Area (NPA) |
| PL-109 | 1998-01-06 | NANP-Overlay of 813 (Florida) Numbering Plan Area (NPA) |
| PL-108 | 1998-01-05 | NPA Test Number Change for the New 530 Numbering Plan Area (NPA) in California |
| PL-107 | 1997-12-23 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 813 NPA (Florida) |
| PL-106 | 1997-12-23 | Transfer of NANP Administration Responsibilities to Lockheed Martin IMS |
| PL-104 | 1997-12-10 | Additional Changes to the Split of 508 & 617 NPAs (Massachusetts) |
| PL-100 | 1997-12-10 | NANP-Split of 910 (North Carolina) Numbering Plan Area (NPA) - Revised |
| PL-103 | 1997-11-21 | NANP-Introduction of New 784 (St. Vincent and the Grenadines) Numbering Plan Area (NPA) |
| PL-102 | 1997-11-21 | NANP-Overlay of 770 and 404 Numbering Plan Areas (NPA) in Georgia |
| PL-101 | 1997-11-19 | Revisions to the Split of 614 (Ohio) Numbering Plan Area (NPA) |
| PL-099 | 1997-11-10 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 512 NPA (Texas) |
| PL-098 | 1997-11-06 | NANP-Split of 209 (California) Numbering Plan Area (NPA) |
| PL-097 | 1997-10-30 | Extraordinary NPA-Specific Conservation Procedures for 516 NPA (New York) |
| PL-095 | 1997-10-07 | Extension in the Permissive Dialing Period for the 508 and 617 NPA Relief Plans (Massachusetts) |
| PL-094 | 1997-10-06 | Changes to Extraordinary NPA-Specific Conservation Procedures for 215 and 717 NPAs (Pennsylvania) |
| PL-093 | 1997-10-06 | Changes to Extraordinary NPA-Specific Jeopardy Conservation Procedures for the 972 NPA (Texas) |
| PL-092 | 1997-09-25 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for 281 and 713 Numbering Plan Areas in Houston, Texas |
| PL-091 | 1997-09-23 | NANP-Split of 412 (Pennsylvania) Numbering Plan Area (NPA) |
| PL-089 | 1997-09-12 | Automatic Number Identification Digits (ANI II) for Pay Phone Compensation |
| PL-088 | 1997-09-11 | NANP – Split of 614 (Ohio) Numbering Plan Area (NPA) |
| PL-085 | 1997-09-11 | NANP-Split of 405 (Oklahoma) Numbering Plan Area (NPA) |
| PL-087 | 1997-09-05 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for North Carolina and South Carolina Numbering Plan Areas |
| PL-086 | 1997-09-05 | NANP-Split of 803 (South Carolina) Numbering Plan Area (NPA) |
| PL-084 | 1997-09-02 | NANP-Split of 403 (Alberta) Numbering Plan Area (NPA) |
| PL-082 | 1997-09-02 | Extraordinary NPA-Specific Conservation Procedures for 610 NPA (Pennsylvania) |
| PL-081 | 1997-08-15 | NANP-Split of 615 (Tennessee) Numbering Plan Area (NPA) |
| PL-080 | 1997-08-13 | Changes in Test Numbers and Effective Dates for California NPA Splits |
| PL-079 | 1997-07-31 | NANP-Split of 601 (Mississippi) Numbering Plan Area (NPA) |
| PL-077 | 1997-07-28 | NANP-Split of 816 (Missouri) Numbering Plan Area (NPA) |
| PL-076 | 1997-07-17 | NANP-Split of 514 (Quebec) Numbering Plan Area (NPA) |
| PL-074 | 1997-07-02 | NANP-Assignment of 877 NPA for Toll-Free Services |
| PL-072 | 1997-06-23 | NANP-Split of 916 (California) Numbering Plan Area (NPA) |
| PL-071 | 1997-06-20 | Changes to the 415 and 714 NPA (California) Relief Plans |
| PL-070 | 1997-06-16 | Extraordinary NPA-Specific Conservation Procedures for 908 NPA (New Jersey) |
| PL-069 | 1997-06-16 | NANP-Split of 617 (Massachusetts) Numbering Plan Area (NPA) |
| PL-068 | 1997-06-16 | NANP-Split of 508 (Massachusetts) Numbering Plan Area (NPA) |
| PL-067 | 1997-06-10 | Extraordinary NPA-Specific Conservation Procedures for 210 NPA (Texas) |
| PL-066 | 1997-05-30 | NANP-Split of 313 (Michigan) Numbering Plan Area (NPA) |
| PL-065 | 1997-05-30 | NANP- Split of 801 (Utah) Numbering Plan Area (NPA) |
| PL-064 | 1997-05-22 | Change in Test Number for Split of 817 NPA (Texas) |
| PL-063 | 1997-05-22 | NANP- Split of 408 (California) Numbering Plan Area (NPA) |
| PL-062 | 1997-05-19 | NANP- Split of 213 (California) Numbering Plan Area (NPA) |
| PL-061 | 1997-05-19 | NANP- Split of 510 (California) Numbering Plan Area (NPA) |
| PL-060 | 1997-05-13 | Announcement of Jeopardy Procedures for 510 and 916 NPAs (California) |
| PL-059 | 1997-05-12 | NANP-Split of 904 (Florida) Numbering Plan Area (NPA) |
| PL-058 | 1997-05-12 | Extraordinary NPA-Specific Conservation Procedures for 972 NPA (Texas) |
| PL-057 | 1997-05-05 | Extraordinary NPA-Specific Conservation Procedures for 770 NPA (Georgia) |
| PL-056 | 1997-04-29 | NANP-Introduction of New 340 (U.S. Virgin Islands) Numbering Plan Area (NPA) |
| PL-055 | 1997-04-29 | Extraordinary NPA-Specific Conservation Procedures for 215 and 412 NPAs (Pennsylvania) |
| PL-054 | 1997-04-28 | Extraordinary NPA-Specific Jeopardy Conservation Procedures Announced for Seven California Number Plan Areas (NPAs) |
| PL-053 | 1997-04-24 | NANP-Split of 913 (Kansas) Numbering Plan Area (NPA) |
| PL-052 | 1997-04-22 | Important Notice of Delay in Implementation of NPA Relief for the 412 NPA (Pennsylvania) |
| PL-047 | 1997-03-14 | Extraordinary NPA-Specific Conservation Procedures for 508 and 617 NPAs (Massachusetts) |
| PL-045 | 1997-03-12 | NANP-Split of 216 (Ohio) Numbering Plan Area (NPA) |
| PL-044 | 1997-03-06 | NANP-Split of 714 (California) Numbering Plan Area (NPA) |
| PL-043 | 1997-02-25 | Assignment of Service Codes 311 and 711 |
| PL-042 | 1997-02-25 | Extraordinary NPA-Specific Conservation Procedures for 501 NPA (Arkansas) |
| PL-041 | 1997-02-24 | Extraordinary NPA-Specific Conservation Procedures for 717 NPA (Pennsylvania) |
| PL-040 | 1997-02-18 | Reissuance of Notification of NANP-Split of 414 (Wisconsin) Numbering Plan Area (NPA) to Correct End Permissive Date |
| PL-037 | 1997-01-23 | NANP-Split of 908 (New Jersey) Numbering Plan Area (NPA) |
| PL-036 | 1997-01-23 | NANP-Split of 201 (New Jersey) Numbering Plan Area (NPA) |
| PL-038 | 1997-01-23 | North American Numbering Plan Area Codes - 1997 Update |
| PL-035 | 1997-01-22 | NANP-Split of 210 (Texas) Numbering Plan Area (NPA) |
| PL-034 | 1997-01-22 | NANP-Split of 817 (Texas) Numbering Plan Area (NPA) |
| PL-033 | 1997-01-22 | NANP-Split of 501 (Arkansas) Numbering Plan Area (NPA) |
| PL-032 | 1997-01-15 | NANP-Split of 414 (Wisconsin) Numbering Plan Area (NPA) |
| PL-029 | 1997-01-15 | NANP-Introduction of New 649 (Turks and Caicos Islands) Numbering Plan Area (NPA) |
| PL-028 | 1997-01-02 | NANP-Split of 818 (California) Numbering Plan Area (NPA) |
| PL-027 | 1996-12-19 | Extraordinary NPA-Specific Conservation Procedures for 310, 415, 619 and 714 NPAs (California) |
| PL-024 | 1996-11-25 | NANP-Introduction of New 473 (Grenada) Numbering Plan Area (NPA) |
| PL-022 | 1996-11-22 | NANP-Split of 415 (California) Numbering Plan Area (NPA) |
| PL-020 | 1996-11-08 | NANP-Introduction of New 284 (British Virgin Islands) Numbering Plan Area (NPA) |
| PL-019 | 1996-10-31 | NANP-Split of 206 (Washington State) Numbering Plan Area (NPA) |
| PL-018 | 1996-10-31 | NANP-Overlay of 412 (Pennsylvania) Numbering Plan Area (NPA) |
| PL-015 | 1996-10-15 | NANP-Introduction of New 264 (Anguilla) Numbering Plan Area (NPA) |
| PL-014 | 1996-10-09 | NANP-Introduction of New 876 (Jamaica) Numbering Plan Area (NPA) |
| PL-012 | 1996-10-08 | NANP-Split of 810 (Michigan) Numbering Plan Area (NPA) |
| PL-013 | 1996-09-30 | NANP-Introduction of New 867 (Yukon & Northwest Territories) Numbering Plan Area (NPA) |
| PL-011 | 1996-09-13 | Change in Test Number for the New 869 (St. Kitts & Nevis) Numbering Plan Area (NPA) |
| PL-010 | 1996-09-04 | NANP-Introduction of New 670 (CNMI) Numbering Plan Area (NPA) |
| PL-009 | 1996-09-03 | NANP-Split of 317 (Indiana) Numbering Plan Area (NPA) |
| PL-006 | 1996-08-05 | NANP-Split of 713 (Texas) Numbering Plan Area (NPA) |
| PL-005 | 1996-08-05 | NANP-Split of 214 (Texas) Numbering Plan Area (NPA) |
| PL-004 | 1996-08-05 | NANP- Introduction of New 671 (Guam) Numbering Plan Area (NPA) |
| IL-96-07-004 | 1996-07-17 | Correction to 301 NPA (Maryland) Relief Plan Contact Information |
| PL-003 | 1996-07-12 | NANP-Introduction of New 767 (Dominica) Numbering Plan Area (NPA) |
| PL-002 | 1996-07-11 | NANP-Introduction of New 345 (Cayman Islands) Numbering Plan Area (NPA) |
| PL-001 | 1996-07-02 | NANP-Introduction of New 869 (St. Kitts and Nevis) Numbering Plan Area (NPA) |
| IL-96-06-011 | 1996-06-28 | NANP-Split of 513 (Ohio) Numbering Plan Area (NPA) |
| IL-96-06-009 | 1996-06-21 | NANP-Overlay of 301 (Maryland) Numbering Plan Area (NPA) |
| IL-96-06-008 | 1996-06-21 | NANP-Overlay of 410 (Maryland) Numbering Plan Area (NPA) |
| IL-96-06-001 | 1996-06-04 | NANP-Introduction of New 868 (Trinidad & Tobago) Numbering Plan Area (NPA) |
| PL-000 | 1996-05-13 | NANP-Introduction of North American Numbering Plan (NANP) Planning Letters |
| IL-96-04-016 | 1996-04-30 | Designation of Universal IntraLATA Presubscribed Carrier Verification Number |
| IL-96-04-010 | 1996-04-22 | NANP-Introduction of New 664 (Montserrat) Numbering Plan Area (NPA) |
| IL-96-04-009 | 1996-04-22 | NANP-Split of 619 (California) Numbering Plan Area (NPA) |
| IL-96-04-014 | 1996-04-01 | NANP-Introduction of New 758 (St. Lucia) Numbering Plan Area (NPA) |
| IL-96-03-005 | 1996-03-26 | NANP-Introduction of New 268 (Antigua & Barbuda) Numbering Plan Area (NPA) |
| IL-96-02-014 | 1996-02-29 | NANP-Split of 312 (Illinois) Numbering Plan Area (NPA) |
| IL-96-02-013 | 1996-02-29 | NANP-SPLIT OF 804 (VIRGINIA) NUMBERING PLAN AREA (NPA) |
| IL-96-02-004 | 1996-02-08 | NANP-SPLIT OF 407 NUMBERING PLAN AREA (NPA) |
| IL-96-01-017 | 1996-01-30 | REVISIONS TO THE SPLIT OF 612 (MINNESOTA) NUMBERING PLAN AREA (NPA) |
| IL-96-01-012 | 1996-01-25 | NANP-SPLIT OF 310 (CALIFORNIA) NUMBERING PLAN AREA (NPA) |
| IL-96-01-016 | 1996-01-01 | NORTH AMERICAN NUMBERING PLAN NUMBERING PLAN AREA CODES - 1996 UPDATE |
| IL-95-12-007 | 1995-12-11 | NANP-ASSIGNMENT OF 880 AND 881 NPAS FOR INBOUND FOREIGN BILLED CALLS TO TOLL-FREE NUMBERS |
| IL-95-12-006 | 1995-12-11 | NANP-INTRODUCTION OF 246 (BARBADOS) NUMBERING PLAN AREA (NPA) |
| IL-95-12-005 | 1995-12-11 | NANP-INTRODUCTION OF NEW 787 (PUERTO RICO) NUMBERING PLAN AREA (NPA) |
| IL-95-11-009 | 1995-11-17 | NANP-INTRODUCTION OF 242 (BAHAMAS) NUMBERING PLAN AREA (NPA) |
| IL-95-11-008 | 1995-11-17 | NANP-SPLIT OF 216 (OHIO) NUMBERING PLAN AREA (NPA) |
| IL-95-11-007 | 1995-11-17 | NANP CAPACITY EXPANSION STUDY BY THE INC |
| IL-95-09-008 | 1995-09-27 | NANP-SPLIT OF 904 (FLORIDA) NUMBERING PLAN AREA (NPA) |
| IL-95-09-007 | 1995-09-15 | NANP-SPLIT OF 612 (MINNESOTA) NUMBERING PLAN AREA (NPA) |
| IL-95-08-015 | 1995-08-31 | NANP-SPLIT OF 314 (MISSOURI) NUMBERING PLAN AREA (NPA) |
| IL-95-08-011 | 1995-08-23 | NANP-SPLIT OF 305 (FLORIDA) NUMBERING PLAN AREA (NPA) |
| IL-95-08-007 | 1995-08-17 | NANP-SPLIT OF 604 (BRITISH COLUMBIA) NUMBERING PLAN AREA (NPA) |
| IL-95-07-015 | 1995-07-27 | NANP-SPLIT OF 708 (ILLINOIS) NUMBERING PLAN AREA (NPA) |
| IL-95-06-008 | 1995-06-22 | NANP-SPLIT OF 404 (GEORGIA) NUMBERING PLAN AREA (NPA) |
| IL-95-06-004 | 1995-06-08 | NANP-STATUS OF CARRIER IDENTIFICATION CODE (CIC) EXPANSION |
| IL-95-05-010 | 1995-05-25 | NANP-ASSIGNMENT OF 888 NPA FOR TOLL-FREE SERVICES |
| IL-95-05-007 | 1995-05-19 | NANP-SPLIT OF 503 (OREGON) NUMBERING PLAN AREA (NPA) |
| IL-95-05-004 | 1995-05-05 | NANP-EXTENSION OF PERMISSIVE DIALING FOR 360 NPA (WASHINGTON STATE) |
| IL-95-04-007 | 1995-04-21 | NANP-ADVANCE OF 703 NPA (VIRGINIA) PERMISSIVE DIALING PERIOD |
| IL-95-04-002 | 1995-04-06 | NANP-SPLIT OF 203 (CONNECTICUT) NUMBERING PLAN AREA (NPA) |
| IL-95-03-006 | 1995-03-14 | NANP-SPLIT OF 803 (SOUTH CAROLINA) NUMBERING PLAN AREA (NPA) |
| IL-95-03-002 | 1995-03-08 | NANP-OVERLAY OF 214 (TEXAS) NUMBERING PLAN AREA (NPA) |
| IL-95-01-018 | 1995-01-31 | NORTH AMERICAN NUMBERING PLAN NUMBERING PLAN AREA CODES - 1995 UPDATE |
| IL-94-12-008 | 1994-12-28 | NANP-OVERLAY OF 310 (CALIFORNIA) NUMBERING PLAN AREA (NPA) |
| IL-94-12-007 | 1994-12-28 | NANP-ASSIGNMENT AND PROTECTION OF ADDITIONAL PCS NPA CODES |
| IL-94-11-018 | 1994-11-22 | NANP-SPLIT OF 615 (TENNESSEE) NUMBERING PLAN AREA (NPA) |
| IL-94-11-016 | 1994-11-16 | NANP-INTRODUCTION OF NEW 441 (BERMUDA) NUMBERING PLAN AREA (NPA) |
| IL-94-11-014 | 1994-11-16 | NANP-RETURN OF 800-555 TO THE 800 SMS |
| IL-94-09-013 | 1994-09-21 | NANP-SPLIT OF 813 (FLORIDA) NUMBERING PLAN AREA (NPA) |
| IL-94-09-012 | 1994-09-21 | NANP-SPLIT OF 303 (COLORADO) NUMBERING PLAN AREA (NPA) |
| IL-94-08-012 | 1994-08-19 | NANP-OVERLAY OF 713 (TEXAS) NUMBERING PLAN AREA (NPA) |
| IL-94-08-005 | 1994-08-09 | NANP-SPLIT OF 703 (VIRGINIA) NUMBERING PLAN AREA (NPA) |
| IL-94-08-004 | 1994-08-09 | NANP-OVERLAY OF 708 (ILLINOIS) NUMBERING PLAN AREA (NPA) |
| IL-94-05-005 | 1994-05-19 | NANP-ASSIGNMENT OF SERVICE ACCESS CODE (SAC) 500 FOR PCS |
| IL-94-05-004 | 1994-05-13 | NANP-APPROVAL OF 555 NXX ASSIGNMENT GUIDELINES AND IMPLEMENTATION TIMELINE |
| IL-94-01-033 | 1994-01-26 | NANP-SPLIT OF 205 (ALABAMA) NUMBERING PLAN AREA (NPA) |
| IL-94-01-030 | 1994-01-21 | NANP-SPLIT OF 602 (ARIZONA) NUMBERING PLAN AREA (NPA) |
| IL-94-01-029 | 1994-01-21 | NANP-SPLIT OF 206 (WASHINGTON STATE) NUMBERING PLAN AREA (NPA) |
| IL-94-01-002 | 1994-01-03 | OPENING OF 710 NUMBERING PLAN AREA (NPA) CODE |
| IL-94-01-001 | 1994-01-03 | STATUS OF NUMBERING IN THE NANP SERVED AREA |
| IL-93-08-002 | 1993-08-02 | ASSIGNMENT OF NPA CODE "456" FOR INTERNATIONAL CARRIER IDENTIFICATION |
| IL-93-04-026 | 1993-04-15 | INTRODUCTION OF SERVICE ACCESS CODE (SAC) 600 IN CANADA |
| IL-93-04-016 | 1993-04-09 | UPDATED INFORMATION ON THE GEORGIA 404/706 SPLIT AND THE CALIFORNIA 714/909 SPLIT |
| IL-93-01-017 | 1993-01-13 | STATUS OF NUMBERING PLAN AREA (NPA) CODES IN WORLD ZONE 1 |
| IL-93-01-008 | 1993-01-08 | NORTH AMERICAN NUMBERING PLAN ADMINISTRATOR'S PROPOSAL ON THE FUTURE OF NUMBERING IN WORLD ZONE 1 - SECOND EDITION |
| IL-93-01-001 | 1993-01-05 | NANP-SPLIT OF 215 (PENNSYLVANIA) NUMBERING PLAN AREA (NPA) |
| IL-92-11-022 | 1992-11-23 | NANP-SPLIT OF 313 (MICHIGAN) NUMBERING PLAN AREA (NPA) |
| IL-92-11-024 | 1992-11-13 | NANP-SPLIT OF 919 (NORTH CAROLINA) NUMBERING PLAN AREA (NPA) |
| IL-92-10-017 | 1992-10-20 | FUTURE WORK PLAN: NANPA'S PROPOSAL ON THE FUTURE OF NUMBERING IN WORLD ZONE 1 |
| IL-92-09-046 | 1992-10-01 | NANP-SPLIT OF 416 (ONTARIO, CANADA) NUMBERING PLAN AREA (NPA) |
| IL-92-03-068 | 1992-03-01 | NANP-SPLIT OF 512 (SOUTH TEXAS) NUMBERING PLAN AREA (NPA) |
| IL-92-02-022 | 1992-02-18 | NANP-SPLIT OF 714 (CALIFORNIA) NUMBERING PLAN AREA (NPA) |
| IL-92-01-013 | 1992-01-06 | NORTH AMERICAN NUMBERING PLAN ADMINISTRATOR'S PROPOSAL ON THE FUTURE OF NUMBERING IN WORLD ZONE 1 |
| IL-91-10-058 | 1991-10-30 | NANP-SPLIT OF THE 404 NUMBERING PLAN AREA (NPA) AND DIALING PROCEDURE CHANGES IN THE 912 NPA IN THE STATE OF GEORGIA |
| IL-91-08-009 | 1991-08-07 | NANP-REVISED NPA MAP SHOWING NEW NPAS SCHEDULED TO BE INTRODUCED IN 1992 AND 1993 |
| IL-91-08-001 | 1991-08-01 | NANP-INTRODUCTION OF THE 917 NUMBERING PLAN AREA (NPA) IN NEW YORK CITY AND TRANSFER OF THE BRONX, NEW YORK, FROM THE 212 NPA TO THE 718 NPA |
| IL-91-06-044 | 1991-06-27 | NANP - CORRECTIVE CONSIDERATIONS FOR ELIMINATION OF BLOCKED NETWORK CALLS FROM CERTAIN CUSTOMER PREMISES EQUIPMENT |
| IL-91-05-035 | 1991-05-17 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE TEXAS 713 NPA |
| IL-91-05-028 | 1991-05-13 | INTEGRATION OF PUBLIC NON-LEC ISDNS INTO THE NORTH AMERICAN NUMBERING PLAN |
| IL-91-03-009 | 1991-03-12 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE 714 NPA |
| IL-91-02-030 | 1991-02-14 | NANP - REVISED NPA MAP SHOWING NEW NPAS SCHEDULED TO BE INTRODUCED IN 1991 |
| IL-91-01-045 | 1991-01-29 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE 206 NPA |
| IL-90-12-050 | 1990-12-28 | NANP - REMINDER OF FEBRUARY 1, 1991 DATE FOR ELIMINATION OF THE USE OF THE 706 AND 905 NPA CODES FOR CALLS TO MEXICO |
| IL-90-12-049 | 1990-12-28 | NANP - SPLIT OF THE 301 (MARYLAND) NUMBERING PLAN AREA (NPA) |
| IL-90-08-055 | 1990-08-31 | NANP - SPLIT OF 213 (CALIFORNIA) NUMBERING PLAN AREA |
| IL-90-08-052 | 1990-08-31 | NANP - REMINDER OF NUMBERING PLAN AREA (NPA) CODE SPLITS IN TEXAS AND NEW JERSEY |
| IL-90-07-004 | 1990-07-09 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE 215 NPA |
| IL-90-06-023 | 1990-06-13 | NANP - REVISED DATE FOR SPLIT OF 415 (CALIFORNIA) NUMBERING PLAN AREA |
| IL-90-04-003 | 1990-04-03 | NANP - INTRODUCTION OF DIALING PROCEDURE CHANGES IN THE 202 AND PORTIONS OF THE 301 AND 703 NUMBERING PLAN AREA (NPAS) |
| IL-90-04-002 | 1990-04-03 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE 205 NPA |
| IL-90-04-001 | 1990-04-03 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE 512 NPA |
| IL-89-12-022 | 1989-12-13 | NANP - INTERCHANGEABLE CENTRAL OFFICE CODES IN THE MICHIGAN 313 NPA |
| IL-89-10-072 | 1989-10-31 | NANP - INTRODUCTION OF INTERCHANGEABLE CENTRAL OFFICE CODES IN THE 919 NPA |
| IL-89-10-049 | 1989-10-19 | NANP - REVISED NPA MAPS SHOWING NEW NPAS SCHEDULED TO BE INTRODUCED IN 1989 AND 1990 |
| IL-89-10-048 | 1989-10-19 | NANP - INTERCHANGEABLE CENTRAL OFFICE CODES IN THE TORONTO, ONTARIO, CANADA 416 NPA |
| IL-89-10-047 | 1989-10-19 | NANP - INTERCHANGEABLE CENTRAL OFFICE CODES IN THE ARIZONA 602 NPA |
| IL-89-09-010 | 1989-09-01 | NANP - SPLIT OF THE 201 NUMBERING PLAN AREA |
| IL-89-05-038 | 1989-05-26 | NANP - RELIEF OF THE 214 NUMBERING PLAN AREA |
| IL-89-04-028 | 1989-04-21 | 312 NUMBERING PLAN AREA (NPA) CODE SPLIT IN ILLINOIS |
| IL-89-02-014 | 1989-02-06 | NANP-INTERCHANGEABLE CENTRAL OFFICE CODES IN 404 NPA |
| IL-88-06-012 | 1988-06-07 | NORTH AMERICAN NUMBERING AND DIALING PLANS |
| IL-88-04-015 | 1988-04-08 | NANP - SPLIT OF THE 312 NUMBERING PLAN AREA |
| IL-87-07-003 | 1987-07-02 | NANP - SPLIT OF THE 617 NUMBERING PLAN AREA |
| IL-87-03-045 | 1987-03-27 | NANP - SPLIT OF THE 303 NUMBERING PLAN AREA |
| IL-87-03-033 | 1987-03-20 | NANP - SPLIT OF THE 305 NUMBERING PLAN AREA |
| IL-781-84-04-031 | 1984-04-06 | NANP – SPLIT OF THE 212 NUMBERING PLAN AREA |
All documents are official NANPA planning letters (Tier A sources). This page consolidates every letter we have on record for this event; it is updated automatically when new letters are detected, with sensitive changes held for editorial review first.