NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2002-04-30 504-520 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWORLEANS LA
2002-04-30 509-833 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 YAKIMA WA
2002-04-30 509-845 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PASCO WA
2002-04-30 574-971 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GOSHEN IN
2002-04-30 612-291 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2002-04-30 612-292 not yet reported which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MN 8405 TWINCITIES MN
2002-04-30 719-422 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 TRINIDAD CO
2002-04-30 719-423 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CO 6118 PUEBLO CO
2002-04-30 720-286 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2002-04-30 754-264 0XXX1XXX7XXX8XXX · 3 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 DEERFLDBCH FL
2002-04-30 774-253 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WORCESTER MA
2002-04-30 814-414 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 ALTOONA PA
2002-04-30 814-753 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 STATECOLLG PA
2002-04-30 814-791 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 CURWENSVL PA
2002-04-30 850-387 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 PANAMACITY FL
2002-04-30 850-388 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 VERNON FL
2002-04-30 850-389 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 DESTIN FL
2002-04-30 850-390 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 PENSACOLA FL
2002-04-30 850-391 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 TALLAHASSE FL
2002-04-30 859-757 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KY 4369 COVINGTON KY
2002-04-30 864-649 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → PAETEC ITEL, LLC 829J GAFFNEY SC
2002-04-30 865-684 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 KNOXVILLE TN
2002-04-30 865-685 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TN 4806 OAK RIDGE TN
2002-04-30 907-347 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FAIRBANKS AK
2002-04-30 912-472 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 TYBEE IS GA
2002-04-30 920-422 not yet reported which blocks → METRO SOUTHWEST PCS, LLP 9759 APPLETON WI
2002-04-29 218-260 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 DULUTH MN
2002-04-29 218-293 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 HIBBING MN
2002-04-29 218-297 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 BRAINERD MN
2002-04-29 218-303 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 MOORHEAD MN
2002-04-29 218-321 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 FERGUS FLS MN
2002-04-29 218-325 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 DETROITLKS MN
2002-04-29 225-304 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 TELECOM OF LOUISIANA, LLC - LA 7488 DENHAM SPG LA
2002-04-29 225-570 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 ZACHARY LA
2002-04-29 228-273 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 TELECOM OF MISSISSIPPI, LLC - MS 220C BILOXI MS
2002-04-29 228-284 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GULFPORT MS
2002-04-29 228-447 0XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OCEAN SPG MS
2002-04-29 228-471 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PASCAGOULA MS
2002-04-29 228-671 none assigned yet which blocks → METROPCS, INC. 5562 BAYSTLOUIS MS
2002-04-29 231-668 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2002-04-29 231-903 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUSKEGON MI
2002-04-29 251-418 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MCINTOSH AL
2002-04-29 251-517 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 FAIRHOPE AL
2002-04-29 316-665 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 WICHITA KS
2002-04-29 316-842 0XXX1XXX3XXX6XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - KS 2240 NEWTON KS
2002-04-29 318-295 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 BUNKIE LA
2002-04-29 318-303 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 RAYVILLE LA
2002-04-29 318-402 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 SHREVEPORT LA
2002-04-29 318-450 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MONROE LA
2002-04-29 318-461 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - LA 3232 MANSFIELD LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.