NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2023-02-09 639-479 not yet reported which blocks → Access Communications Co-operative Limited 280H Birch Hills —
2023-02-09 639-530 not yet reported which blocks → Access Communications Co-operative Limited 280H Aberdeen —
2023-02-09 640-245 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J ATLNTIC CY NJ
2023-02-09 640-246 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J TRENTON NJ
2023-02-09 705-468 not yet reported which blocks → Iristel Inc. 154E Gravenhurst —
2023-02-09 742-788 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Wainfleet —
2023-02-09 742-881 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Port Colborne —
2023-02-09 742-883 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Welland —
2023-02-09 742-885 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Georgetown —
2023-02-09 743-256 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 HIGH POINT NC
2023-02-09 806-819 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 LOCKNEY TX
2023-02-09 859-316 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J RICHMOND KY
2023-02-09 980-407 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 CONCORD NC
2023-02-09 986-249 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J IDAHOFALLS ID
2023-02-09 986-251 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J MOSCOW ID
2023-02-08 309-919 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J PEKIN IL
2023-02-08 334-865 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J MONTGOMERY AL
2023-02-08 346-615 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C KATY TX
2023-02-08 351-238 0XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ORANGE MA
2023-02-08 440-859 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MADISON OH
2023-02-08 447-243 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 732J QUINCY IL
2023-02-08 447-245 2XXX which blocks → NUSO, LLC 732J CHAMPAURBN IL
2023-02-08 479-496 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J FORT SMITH AR
2023-02-08 513-513 0–9 XXXwhole prefix which blocks → ONVOY, LLC - OH 464C CINCINNATI OH
2023-02-08 513-990 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 HAMILTON OH
2023-02-08 548-677 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Arthur —
2023-02-08 548-707 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Palmerston —
2023-02-08 548-828 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Listowel —
2023-02-08 548-933 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Linwood —
2023-02-08 548-955 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Drayton —
2023-02-08 585-516 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BATAVIA NY
2023-02-08 608-870 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J STOUGHTON WI
2023-02-08 608-871 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - WI 225C LA CROSSE WI
2023-02-08 608-891 0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WI 225C VIROQUA WI
2023-02-08 608-893 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J MADISON WI
2023-02-08 618-915 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 COLLINSVL IL
2023-02-08 618-916 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 732J HERRIN IL
2023-02-08 618-929 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 COLLINSVL IL
2023-02-08 667-424 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ODENTON MD
2023-02-08 716-682 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC- NY 384C LANCASTER NY
2023-02-08 779-363 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → NUSO, LLC 732J ROCKFORD IL
2023-02-08 779-364 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J STREATOR IL
2023-02-08 786-917 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J MIAMI FL
2023-02-08 786-919 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NORTH DADE FL
2023-02-08 825-755 not yet reported which blocks → Iristel Inc. 154E Calgary —
2023-02-08 859-347 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J LEXINGTON KY
2023-02-08 859-370 0XXX1XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H BURGIN KY
2023-02-07 223-306 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 732J YORK PA
2023-02-07 239-416 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORT MYERS FL
2023-02-07 272-309 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 732J SCRANTON PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.