NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
2010-09-09 832-535 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RICHMNRNBG TX
2010-09-09 867-336 not yet reported which blocks → Bell Mobility 6574 Whitehorse —
2010-09-09 902-324 not yet reported which blocks → Bell Mobility Aliant 329A Truro —
2010-09-09 919-888 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SANFORD NC
2010-09-09 971-277 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 PORTLAND OR
2010-09-08 203-726 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2010-09-08 252-301 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC 6324 AHOSKIE NC
2010-09-08 252-733 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E HAVELOCK NC
2010-09-08 276-335 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 WYTHEVILLE VA
2010-09-08 434-289 0XXX2XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 CREWE VA
2010-09-08 434-616 0–9 XXXall 10 · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 LYNCHBURG VA
2010-09-08 443-771 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 PRINCEFRCK MD
2010-09-08 513-439 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2010-09-08 530-802 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E GRVY MAIN CA
2010-09-08 540-259 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MINERAL VA
2010-09-08 540-838 0–9 XXXall 10 · 8 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 RADFORD VA
2010-09-08 571-612 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 HERNDON VA
2010-09-08 757-585 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WILLIAMSBG VA
2010-09-08 804-466 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 TAPPAHNNCK VA
2010-09-08 909-281 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BIGBEAR CY CA
2010-09-08 910-668 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E PEMBROKE NC
2010-09-08 910-708 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E SWANSBORO NC
2010-09-08 951-305 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2010-09-07 210-800 0–9 XXXall 10 · 4 holders which blocks → EVOLVE CELLULAR, INC. 139F SANANTONIO TX
2010-09-07 254-999 7XXX8XXX9XXX · 2 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D HILLSBORO TX
2010-09-07 302-520 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - DE 969E DELAWARECY DE
2010-09-07 315-565 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SYRACUSE NY
2010-09-07 438-890 not yet reported which blocks → TELUS Quebec 2243 Ile-Perrot —
2010-09-07 438-891 not yet reported which blocks → TELUS Quebec 2243 Lachine —
2010-09-07 438-892 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2010-09-07 438-893 not yet reported which blocks → TELUS Quebec 2243 Pointe-Claire —
2010-09-07 438-894 not yet reported which blocks → TELUS Quebec 2243 Roxboro —
2010-09-07 438-895 not yet reported which blocks → TELUS Quebec 2243 Ste-Genevieve —
2010-09-07 469-444 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LEWISVILLE TX
2010-09-07 514-430 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2010-09-07 514-431 not yet reported which blocks → Fido Solutions Inc. 5643 Montreal —
2010-09-07 518-333 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FTCOVINGTN NY
2010-09-07 581-247 not yet reported which blocks → TELUS Quebec 2243 Charny —
2010-09-07 581-248 not yet reported which blocks → TELUS Quebec 2243 Chicoutimi —
2010-09-07 581-249 not yet reported which blocks → TELUS Quebec 2243 Jonquiere —
2010-09-07 581-250 not yet reported which blocks → TELUS Quebec 2243 Levis —
2010-09-07 581-251 not yet reported which blocks → TELUS Quebec 2243 Loretteville —
2010-09-07 581-252 not yet reported which blocks → TELUS Quebec 2243 Riviere-du-Loup —
2010-09-07 581-253 not yet reported which blocks → TELUS Quebec 2243 St-Nicolas —
2010-09-07 581-254 not yet reported which blocks → TELUS Quebec 2243 Thetford Mines —
2010-09-07 587-896 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2010-09-07 587-897 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2010-09-07 587-898 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2010-09-07 587-899 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Calgary —
2010-09-07 604-558 not yet reported which blocks → Shaw Telecom Inc. 497E Vancouver —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.