NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-08-02 365-230 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Brampton —
2018-08-02 365-231 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Brampton —
2018-08-02 513-547 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F TRENTON OH
2018-08-02 513-548 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MASON OH
2018-08-02 581-419 not yet reported which blocks → Videotron Ltd. 8306 Donnacona —
2018-08-02 587-374 not yet reported which blocks → Iristel Inc. 154E Fort McMurray —
2018-08-02 774-374 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MARLBORO MA
2018-08-02 828-818 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BLOWING RK NC
2018-08-02 873-630 not yet reported which blocks → Telebec Ltee. 8239 Val-D'Or —
2018-08-02 971-332 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 SALEM OR
2018-08-01 309-332 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D STANFORD IL
2018-08-01 618-668 0XXX1XXX2XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC 224C GOLCONDA IL
2018-08-01 757-571 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FRANKLIN VA
2018-08-01 815-551 0XXX1XXX2XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC 224C LANARK IL
2018-08-01 902-970 not yet reported which blocks → Iristel Inc. 154E Amherst —
2018-07-31 272-223 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HAZLETON PA
2018-07-31 272-224 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 POTTSVILLE PA
2018-07-31 424-418 not yet reported which blocks → SHELCOMM 0051 BEVERLYHLS CA
2018-07-31 442-299 not yet reported which blocks → SHELCOMM 0051 VTVL HSPR CA
2018-07-31 562-389 not yet reported which blocks → SHELCOMM 0051 ALAMITOS CA
2018-07-31 603-403 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ROCHESTER NH
2018-07-31 626-477 not yet reported which blocks → SHELCOMM 0051 ALHAMBRA CA
2018-07-31 657-362 not yet reported which blocks → SHELCOMM 0051 ANAHEIM CA
2018-07-31 661-419 not yet reported which blocks → SHELCOMM 0051 HI VISTA CA
2018-07-31 747-280 not yet reported which blocks → SHELCOMM 0051 NO HOLLYWD CA
2018-07-31 802-210 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VT 451F ST ALBANS VT
2018-07-31 805-992 not yet reported which blocks → SHELCOMM 0051 MOORPARK CA
2018-07-31 820-201 not yet reported which blocks → SHELCOMM 0051 OXNARD CA
2018-07-31 848-268 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DUNELLEN NJ
2018-07-31 908-438 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ELIZABETH NJ
2018-07-31 909-508 not yet reported which blocks → SHELCOMM 0051 POMONA CA
2018-07-31 949-479 not yet reported which blocks → SHELCOMM 0051 IRVINE CA
2018-07-31 951-469 not yet reported which blocks → SHELCOMM 0051 TEMECULA CA
2018-07-30 216-243 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F CLEVELAND OH
2018-07-30 239-932 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C LEHIGHACRS FL
2018-07-30 551-282 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F WESTWOOD NJ
2018-07-30 614-812 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 DUBLIN OH
2018-07-30 641-384 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 BELMOND IA
2018-07-30 720-610 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 DENVER CO
2018-07-30 785-590 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - KS 205F ALTA VISTA KS
2018-07-30 786-786 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - FL 937C HOMESTEAD FL
2018-07-30 786-788 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C NORTH DADE FL
2018-07-30 929-483 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN09 NY
2018-07-30 937-744 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K TIPP CITY OH
2018-07-30 939-294 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 ARROYO PR
2018-07-30 939-295 0–9 XXXwhole prefix which blocks → SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2018-07-30 984-230 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E SMITHFIELD NC
2018-07-30 985-283 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F PEARLRIVER LA
2018-07-27 531-455 0XXX1XXX3XXX4XXX5XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E TALMAGE NE
2018-07-26 213-396 not yet reported which blocks → SHELCOMM 0051 LSAN DA 02 CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.