NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
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
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
2012-07-05 740-909 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CHESHIRCTR OH
2012-07-05 772-444 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G JENSEN BCH FL
2012-07-03 210-819 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2012-07-03 336-895 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - NC 8389 GREENSBORO NC
2012-07-03 417-720 0–9 XXXall 10 · 5 holders which blocks → MCC TELEPHONY LLC 593K SPRINGFLD MO
2012-07-03 502-892 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF KENTUCKY, LLC - KY 7260 FRANKFORT KY
2012-07-03 913-333 0–9 XXXall 10 · 4 holders which blocks → AVID COMMUNICATIONS, LLC - KS 742D KANSASCITY KS
2012-07-03 918-416 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 TELECOM OF OKLAHOMA, LLC - OK 7632 CATOOSA OK
2012-07-02 513-926 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2012-07-02 904-528 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF FLORIDA, LP - FL 7635 JACKSONVL FL
2012-07-02 929-225 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN13 NY
2012-06-29 216-777 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F CLEVELAND OH
2012-06-29 270-367 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM KENTUCKY EAST, INC. - LONDON 9691 CANEYVILLE KY
2012-06-29 270-390 0–9 XXXall 10 · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K RADCLIFF KY
2012-06-29 415-687 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAUSALITO CA
2012-06-29 442-223 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NEWBERRY CA
2012-06-29 475-200 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F HUNTINGTON CT
2012-06-29 626-328 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2012-06-29 772-247 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E STUART FL
2012-06-29 803-814 0–9 XXXall 10 · 4 holders which blocks → FAIRFIELD COMMUNICATIONS, INC. - SC 863A COLUMBIA SC
2012-06-29 832-686 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HSTNSUBURB TX
2012-06-29 858-251 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LA JOLLA CA
2012-06-29 859-869 0–9 XXXall 10 · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOONE KY
2012-06-29 863-246 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E POINCIANA FL
2012-06-29 928-494 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F SEDONA AZ
2012-06-28 587-703 not yet reported which blocks → Videotron Ltd. 787G Calgary —
2012-06-28 602-842 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2012-06-28 647-590 not yet reported which blocks → Videotron Ltd. 8306 Toronto —
2012-06-28 720-430 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 DENVER CO
2012-06-28 778-762 not yet reported which blocks → Iristel Inc. 154E Nanaimo —
2012-06-28 910-589 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 WILMINGTON NC
2012-06-28 980-523 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 CHARLOTTE NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.