NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2016-07-11 639-758 not yet reported which blocks → Distributel 081E Wawota —
2016-07-11 639-759 not yet reported which blocks → Distributel 081E Whitewood —
2016-07-11 639-761 not yet reported which blocks → Distributel 081E Wilcox —
2016-07-11 639-762 not yet reported which blocks → Distributel 081E Wolseley —
2016-07-11 660-470 0XXX9XXX · 2 holders which blocks → WINDSTREAM MISSOURI, INC. 1885 LACLEDE MO
2016-07-11 660-559 0XXX5XXX9XXX · 3 holders which blocks → WINDSTREAM MISSOURI, INC. 1885 MADISON MO
2016-07-11 682-360 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
2016-07-11 757-790 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WILLIAMSBG VA
2016-07-11 804-735 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 CHESTER VA
2016-07-11 916-883 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SCRM NORTH CA
2016-07-11 916-884 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LINCOLN CA
2016-07-11 972-469 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J FRISCO TX
2016-07-08 318-585 1XXX which blocks → ONVOY, LLC - LA 749E SHREVEPORT LA
2016-07-08 469-473 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FRISCO TX
2016-07-08 650-484 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2016-07-08 717-941 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 HARISBGZN1 PA
2016-07-08 814-250 0–9 XXXall 10 · 6 holders which blocks → ARMSTRONG TELECOMMUNICATIONS, INC. - PA 422C EDINBORO PA
2016-07-08 831-258 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SALINAS CA
2016-07-08 929-359 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
2016-07-07 343-803 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2016-07-07 470-340 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NW GA
2016-07-07 470-438 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 ATLANTA NW GA
2016-07-07 574-393 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 SOUTH BEND IN
2016-07-07 629-262 0–9 XXXall 10 · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 NASHVILLE TN
2016-07-07 639-489 not yet reported which blocks → Distributel 081E Aberdeen —
2016-07-07 639-490 not yet reported which blocks → Distributel 081E Allan —
2016-07-07 639-491 not yet reported which blocks → Distributel 081E Alvena —
2016-07-07 639-492 not yet reported which blocks → Distributel 081E Asquith —
2016-07-07 639-493 not yet reported which blocks → Distributel 081E Beechy —
2016-07-07 639-494 not yet reported which blocks → Distributel 081E Biggar —
2016-07-07 639-495 not yet reported which blocks → Distributel 081E Blaine Lake —
2016-07-07 639-496 not yet reported which blocks → Distributel 081E Borden —
2016-07-07 639-497 not yet reported which blocks → Distributel 081E Bruno —
2016-07-07 639-498 not yet reported which blocks → Distributel 081E Colonsay —
2016-07-07 639-499 not yet reported which blocks → Distributel 081E Cudworth —
2016-07-07 639-500 not yet reported which blocks → Distributel 081E Dalmeny —
2016-07-07 639-501 not yet reported which blocks → Distributel 081E Delisle —
2016-07-07 639-502 not yet reported which blocks → Distributel 081E Dinsmore —
2016-07-07 639-503 not yet reported which blocks → Distributel 081E Duck Lake —
2016-07-07 639-504 not yet reported which blocks → Distributel 081E Dundurn —
2016-07-07 639-505 not yet reported which blocks → Distributel 081E Hafford —
2016-07-07 639-506 not yet reported which blocks → Distributel 081E Hague —
2016-07-07 639-507 not yet reported which blocks → Distributel 081E Hanley —
2016-07-07 639-508 not yet reported which blocks → Distributel 081E Hepburn —
2016-07-07 639-509 not yet reported which blocks → Distributel 081E Langham —
2016-07-07 639-510 not yet reported which blocks → Distributel 081E Lanigan —
2016-07-07 639-512 not yet reported which blocks → Distributel 081E Lucky Lake —
2016-07-07 639-513 not yet reported which blocks → Distributel 081E Meacham —
2016-07-07 639-514 not yet reported which blocks → Distributel 081E Osler —
2016-07-07 639-515 not yet reported which blocks → Distributel 081E Outlook —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.