NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/18/2026
Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.
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| Assigned | NPA-NXX | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|
| 2010-03-31 | 408-673 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SNJS WEST | CA |
| 2010-03-12 | 424-254 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | REDONDO | CA |
| 2010-03-04 | 646-998 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2010-02-19 | 252-696 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | SCOTLDNECK | NC |
| 2010-02-17 | 606-431 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ELKHORN CY | KY |
| 2010-02-15 | 702-246 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAUGHLIN | NV |
| 2010-02-09 | 912-559 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA | 7435 | JESUP | GA |
| 2010-02-03 | 818-855 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | VAN NUYS | CA |
| 2010-01-27 | 484-772 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | READING | PA |
| 2010-01-27 | 631-318 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | AMAGANSETT | NY |
| 2010-01-21 | 480-779 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2010-01-13 | 772-252 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - FL | 8664 | FORTPIERCE | FL |
| 2009-12-14 | 808-419 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | WAILUKU | HI |
| 2009-12-08 | 808-339 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HILO | HI |
| 2009-12-08 | 808-729 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HONOLULU | HI |
| 2009-12-08 | 808-975 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LIHUE | HI |
| 2009-11-30 | 970-818 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | FT COLLINS | CO |
| 2009-11-12 | 615-679 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TN | 7977 | NASHVILLE | TN |
| 2009-11-06 | 201-878 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NJ | 7134 | JERSEYCITY | NJ |
| 2009-11-02 | 917-243 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2009-10-29 | 803-560 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC | 8534 | LK WYLIE W | SC |
| 2009-10-27 | 252-712 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | AYDEN | NC |
| 2009-10-27 | 252-805 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | STANTONSBG | NC |
| 2009-10-26 | 424-253 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BEVERLYHLS | CA |
| 2009-10-16 | 585-282 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | FAIRPORT | NY |
| 2009-10-16 | 716-529 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WILLIAMSVL | NY |
| 2009-10-15 | 252-680 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | FOUNTAIN | NC |
| 2009-10-02 | 224-737 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HALF DAY | IL |
| 2009-09-30 | 585-456 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2009-09-30 | 716-279 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | BUFFALO | NY |
| 2009-09-25 | 585-625 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | ROCHESTER | NY |
| 2009-09-25 | 716-242 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BUFFALO | NY |
| 2009-09-25 | 910-518 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC | 7835 | BEULAVILLE | NC |
| 2009-09-23 | 484-426 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ALLENTOWN | PA |
| 2009-09-09 | 720-358 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HUDSON | CO |
| 2009-09-02 | 412-416 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PTTSBGZON1 | PA |
| 2009-08-25 | 814-651 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | ERIE | PA |
| 2009-08-24 | 757-346 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA | 7238 | COURTLAND | VA |
| 2009-08-21 | 385-351 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MIDVALE | UT |
| 2009-08-17 | 304-500 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | BERKELYSPG | WV |
| 2009-08-14 | 747-224 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | NORTHRIDGE | CA |
| 2009-08-05 | 336-419 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | GREENSBORO | NC |
| 2009-06-15 | 480-339 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2009-06-15 | 623-240 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2009-06-04 | 484-355 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | READING | PA |
| 2009-06-02 | 702-522 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LAS VEGAS | NV |
| 2009-05-12 | 571-293 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | LEESBURG | VA |
| 2009-04-24 | 267-427 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA | 7434 | PENNSBURG | PA |
| 2009-04-07 | 251-287 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7221 | MOBILE | AL |
| 2009-04-02 | 334-523 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AL | 7221 | MONTGOMERY | AL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/18/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.