NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2012-07-17 518-660 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 HUDSON NY
2012-07-17 647-943 not yet reported which blocks → Zayo Canada Inc. 8304 Toronto —
2012-07-17 707-392 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VACAVILLE CA
2012-07-17 716-670 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 DERBY NY
2012-07-17 845-660 0–9 XXXall 10 · 7 holders which blocks → AT&T - LOCAL 7421 AMENIA NY
2012-07-17 873-622 not yet reported which blocks → Videotron Ltd. 8306 Woburn —
2012-07-17 873-623 not yet reported which blocks → Videotron Ltd. 8306 Waterville —
2012-07-16 251-262 0–9 XXXall 10 · 6 holders which blocks → MCC TELEPHONY OF THE SOUTH, LLC - AL 773F JACKSON AL
2012-07-16 469-316 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2012-07-16 651-318 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MN 5256 HASTINGS MN
2012-07-16 832-718 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 HOUSTON TX
2012-07-16 859-412 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KY 6500 COVINGTON KY
2012-07-16 917-485 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN11 NY
2012-07-13 224-302 0–9 XXXall 10 · 7 holders which blocks → ILLINOIS BELL TEL CO 9329 WAUKEGAN IL
2012-07-13 234-240 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 MARLBORO OH
2012-07-13 323-477 0–9 XXXall 10 · 5 holders which blocks → METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2012-07-13 440-405 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 BRECKSVL OH
2012-07-13 470-204 0–9 XXXall 10 · 8 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 GRIFFIN GA
2012-07-13 559-369 0–9 XXXall 10 · 6 holders which blocks → WIDE VOICE, LLC - CA 252F FRESNO CA
2012-07-13 586-343 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROSEVILLE MI
2012-07-13 608-518 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 LA CROSSE WI
2012-07-13 810-228 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2012-07-13 810-259 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FLINT MI
2012-07-13 810-285 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2012-07-13 918-986 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J TULSA OK
2012-07-12 313-229 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2012-07-12 313-352 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN5 MI
2012-07-12 812-832 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SCOTTSBURG IN
2012-07-11 319-359 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY LLC 593K IOWA CITY IA
2012-07-10 319-678 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 IOWA CITY IA
2012-07-10 431-251 not yet reported which blocks → Bell West Inc. 2933 Portage La Prairie —
2012-07-10 579-477 not yet reported which blocks → ISP Telecom Inc. 4727 Ste-Therese —
2012-07-10 579-478 not yet reported which blocks → ISP Telecom Inc. 4727 Mirabel-Aeroport —
2012-07-10 579-479 not yet reported which blocks → ISP Telecom Inc. 4727 Ste-Anne-des-Plaines —
2012-07-10 807-632 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Thunder Bay —
2012-07-10 819-489 not yet reported which blocks → ISP Telecom Inc. 4727 Trois-Rivieres —
2012-07-10 919-588 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 KENLY NC
2012-07-09 256-336 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS LLC - AL 7451 HUNTSVILLE AL
2012-07-09 480-349 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2012-07-09 587-296 not yet reported which blocks → TELUS 8084 Calgary —
2012-07-09 602-638 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2012-07-06 405-772 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J OKLA CITY OK
2012-07-06 717-706 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 CARLISLE PA
2012-07-06 812-913 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K NEW ALBANY IN
2012-07-05 224-303 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKEGAN IL
2012-07-05 484-277 0–9 XXXall 10 · 6 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 LEESPORT PA
2012-07-05 570-761 0–9 XXXall 10 · 7 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 DALLAS PA
2012-07-05 614-694 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K REYNOLDSBG OH
2012-07-05 717-726 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMMONWEALTH TELEPHONE COMPANY LLC 0161 LEWISBERRY PA
2012-07-05 720-357 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 DENVER CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.