NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-09-02 570-405 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - PA 547E ASHLAND PA
2016-09-02 587-665 not yet reported which blocks → Videotron Ltd. 787G Calgary —
2016-09-02 602-603 0–9 XXXall 10 · 4 holders which blocks → VONAGE AMERICA LLC 197D PHOENIX AZ
2016-09-02 669-282 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CAMPBELL CA
2016-09-02 709-996 not yet reported which blocks → TELUS Integrated Communications 2782 Long Pond —
2016-09-02 778-488 not yet reported which blocks → Iristel Inc. 154E North Vancouver —
2016-09-02 778-660 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2016-09-02 782-338 not yet reported which blocks → TELUS Integrated Communications 2782 Lunenburg —
2016-09-02 782-355 not yet reported which blocks → TELUS Integrated Communications 2782 Charlottetown —
2016-09-02 786-789 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C MIAMI FL
2016-09-02 786-913 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C MIAMI FL
2016-09-02 804-207 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - VA 138E CARTERSVL VA
2016-09-02 804-361 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E IRVINGTON VA
2016-09-02 804-369 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - VA 138E LIVELY VA
2016-09-02 804-374 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - VA 138E MANAKIN VA
2016-09-02 804-376 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E POWHATAN VA
2016-09-02 804-390 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - VA 138E CALLAO VA
2016-09-02 804-391 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E COLONILBCH VA
2016-09-02 804-392 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E ENON VA
2016-09-02 804-395 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E FARNHAM VA
2016-09-02 804-468 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - VA 138E HAGUE VA
2016-09-02 804-568 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - VA 138E MATHEWS VA
2016-09-02 915-283 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 EL PASO TX
2016-09-02 929-379 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G NWYRCYZN06 NY
2016-09-02 929-380 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 551G NWYRCYZN09 NY
2016-09-02 929-388 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G NWYRCYZN04 NY
2016-09-02 970-652 0–9 XXXall 10 · 3 holders which blocks → QWEST CORPORATION 9636 GREELEY CO
2016-09-01 225-351 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - LA 749E ROUGON LA
2016-09-01 225-513 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - LA 749E JACKSON LA
2016-09-01 405-581 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 EARLSBORO OK
2016-09-01 515-300 0–9 XXXall 10 · 2 holders which blocks → QWEST CORPORATION 9631 DES MOINES IA
2016-09-01 520-340 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 CASAGRANDE AZ
2016-09-01 539-286 0–9 XXXall 10 · 8 holders which blocks → T-MOBILE USA, INC. 6529 OKMULGEE OK
2016-09-01 587-819 not yet reported which blocks → Iristel Inc. 154E Red Deer —
2016-09-01 816-609 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 KANSASCITY MO
2016-08-31 209-306 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SANANDREAS CA
2016-08-31 236-320 not yet reported which blocks → Shaw Telecom Inc. 497E Chase —
2016-08-31 236-321 not yet reported which blocks → Shaw Telecom Inc. 497E Sicamous —
2016-08-31 236-322 not yet reported which blocks → Shaw Telecom Inc. 497E Tofino —
2016-08-31 346-816 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARCOLA TX
2016-08-31 365-802 not yet reported which blocks → Iristel Inc. 154E Oshawa —
2016-08-31 405-480 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ANADARKO OK
2016-08-31 424-537 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 SNMN MRVS CA
2016-08-31 425-362 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-08-31 431-303 not yet reported which blocks → Iristel Inc. 154E Portage La Prairie —
2016-08-31 484-510 0–9 XXXall 10 · 7 holders which blocks → NUSO, LLC 551G BETHLEHEM PA
2016-08-31 559-207 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CLOVIS CA
2016-08-31 605-504 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9631 SIOUX FLS SD
2016-08-31 641-307 0XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GUTHRIECTR IA
2016-08-31 650-448 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MT VIEW CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.