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
2012-06-11 216-239 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLEVELAND OH
2012-06-11 267-300 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PHPHSBZN43 PA
2012-06-11 401-409 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 CAROLINA RI
2012-06-11 413-307 0–9 XXXall 10 · 5 holders which blocks → AT&T - LOCAL 7421 ADAMS MA
2012-06-11 518-554 0–9 XXXall 10 · 6 holders which blocks → SLIC NETWORK SOLUTIONS, INC. - NY 193C TUPPERLAKE NY
2012-06-11 585-397 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 ROCHESTER NY
2012-06-11 719-367 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D PEYTON CO
2012-06-11 814-376 0XXX1XXX2XXX3XXX4XXX6XXX7XXX · 5 holders which blocks → IDT AMERICA, CORP. - PA 213C PHILIPSBG PA
2012-06-11 918-570 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2012-06-11 918-863 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TULSA OK
2012-06-11 918-871 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TAHLEQUAH OK
2012-06-11 978-541 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 ATHOL MA
2012-06-08 234-214 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 CANTON OH
2012-06-08 240-708 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 LAUREL238 MD
2012-06-08 289-832 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Maple —
2012-06-08 289-865 not yet reported which blocks → Primus Telecommunications Canada Inc. 201A Malton —
2012-06-08 423-268 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JOHNSON CY TN
2012-06-08 423-602 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G CHATTNOOGA TN
2012-06-08 438-382 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2012-06-08 438-494 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2012-06-08 604-427 not yet reported which blocks → Shaw Telecom Inc. 497E Langley —
2012-06-08 646-653 0–9 XXXall 10 · 3 holders which blocks → WIDE VOICE, LLC - NY 705G NWYRCYZN01 NY
2012-06-08 778-455 not yet reported which blocks → Shaw Telecom Inc. 497E Duncan —
2012-06-08 848-216 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 EMILLSTONE NJ
2012-06-08 915-215 0–9 XXXall 10 · 2 holders which blocks → SOUTHWESTERN BELL 9533 EL PASO TX
2012-06-07 253-545 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9638 AUBURN WA
2012-06-07 267-800 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E PHLDLPHZN1 PA
2012-06-07 269-224 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J BATTLE CRK MI
2012-06-07 302-401 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - DE 4801 DOVER DE
2012-06-07 385-336 0–9 XXXall 10 · 4 holders which blocks → FIRSTDIGITAL COMMUNICATIONS, LLC 716D LEHI UT
2012-06-07 424-283 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2012-06-07 484-999 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA 967E W CHESTER PA
2012-06-07 540-509 0–9 XXXall 10 · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F PULASKI VA
2012-06-07 702-842 0XXX1XXX2XXX4XXX9XXX which blocks → PEERLESS NETWORK OF NEVADA, LLC - NV 408F LAKE MEAD NV
2012-06-07 856-888 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F HADDONFLD NJ
2012-06-07 862-333 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F BLOOMFIELD NJ
2012-06-07 862-444 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F ORANGE NJ
2012-06-07 862-666 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F POMPTONLKS NJ
2012-06-07 908-888 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF NEW JERSEY, LLC - NJ 264F CHESTER NJ
2012-06-07 916-462 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J RSVL MAIN CA
2012-06-06 267-245 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 DOYLESTOWN PA
2012-06-06 336-864 0–9 XXXall 10 · 6 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 EDEN NC
2012-06-06 561-320 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E JUPITER FL
2012-06-06 785-315 7XXX which blocks → NEX-TECH WIRELESS, LLC 122D ASSARIA KS
2012-06-06 786-505 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E MIAMI FL
2012-06-06 813-330 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E TAMPAEST FL
2012-06-06 828-569 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HICKORY NC
2012-06-05 208-742 0–9 XXXall 10 · 6 holders which blocks → CUSTER TELEPHONE BROADBAND SERVICES LLC - ID 646G SALMON ID
2012-06-05 234-212 0–9 XXXall 10 · 8 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 TWINSBURG OH
2012-06-05 234-213 0XXX1XXX3XXX · 3 holders which blocks → WINDSTREAM WESTERN RESERVE, INC. 0666 AURORA OH

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.