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
2019-07-02 414-867 0–9 XXXall 10 · 5 holders which blocks → COMMIO, LLC 939H MILWAUKZN1 WI
2019-07-02 437-374 not yet reported which blocks → Iristel Inc. 154E Toronto —
2019-07-02 437-375 not yet reported which blocks → Iristel Inc. 154E Toronto —
2019-07-02 470-519 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ATLANTA NE GA
2019-07-02 479-364 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BENTONVL AR
2019-07-02 661-669 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BIG BUTTE CA
2019-07-02 682-290 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WEATHERFD TX
2019-07-02 712-361 0–9 XXXwhole prefix which blocks → LTE WIRELESS, INC. - IA 460J SCRANTON IA
2019-07-02 712-598 0–9 XXXwhole prefix which blocks → LTE WIRELESS, INC. - IA 460J ODEBOLT IA
2019-07-02 720-782 0–9 XXXall 10 · 2 holders which blocks → AT&T - LOCAL 7421 HUDSON CO
2019-07-02 901-403 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 ARLINGTON TN
2019-07-02 905-368 not yet reported which blocks → InnSysVoice Corp 383H Markham —
2019-07-02 970-753 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 FRUITA CO
2019-07-01 209-630 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 JAMESTOWN CA
2019-07-01 239-295 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FORT MYERS FL
2019-07-01 276-231 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F GALAX VA
2019-07-01 325-266 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F ABILENE TX
2019-07-01 657-388 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-07-01 681-272 0XXX1XXX2XXX3XXX6XXX · 3 holders which blocks → ONVOY, LLC - WV 449F UNION WV
2019-07-01 712-900 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - IA 221F HOLSTEIN IA
2019-07-01 940-292 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F VERNON TX
2019-06-28 312-847 0–9 XXXwhole prefix which blocks → ONVOY, LLC 224C CHICGOZN01 IL
2019-06-28 813-576 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TAMPANTH FL
2019-06-28 865-568 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TN 525E BENTCREEK TN
2019-06-27 228-277 0–9 XXXall 10 · 5 holders which blocks → VOIP INNOVATIONS, LLC 597F GULFPORT MS
2019-06-27 239-291 0–9 XXXall 10 · 6 holders which blocks → EXIANT COMMUNICATIONS LLC 114J FORT MYERS FL
2019-06-27 248-873 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2019-06-27 270-770 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F BOWLNGGREN KY
2019-06-27 385-308 0–9 XXXall 10 · 5 holders which blocks → VOIP INNOVATIONS, LLC 597F MIDVALE UT
2019-06-27 385-432 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - UT 3231 OGDEN UT
2019-06-27 479-362 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - AR 7277 BENTONVL AR
2019-06-27 681-275 0XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F UNIONRIDGE WV
2019-06-27 681-281 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - WV 449F MILTON WV
2019-06-27 681-308 0XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - WV 449F MATEWAN WV
2019-06-27 681-325 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - WV 449F BRANCHLAND WV
2019-06-27 681-366 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - WV 449F CHAPMANVL WV
2019-06-27 681-491 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WV 449F GILBERT WV
2019-06-27 912-431 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 STATESBORO GA
2019-06-27 972-799 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2019-06-26 223-263 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 RED LION PA
2019-06-26 236-702 not yet reported which blocks → Iristel Inc. 154E Burns Lake —
2019-06-26 267-993 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN43 PA
2019-06-26 343-429 not yet reported which blocks → Iristel Inc. 154E Carleton Place —
2019-06-26 343-806 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2019-06-26 505-420 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H ALBUQURQUE NM
2019-06-26 573-813 0XXX1XXX3XXX4XXX6XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 6123 E PRAIRIE MO
2019-06-26 825-802 not yet reported which blocks → Iristel Inc. 154E Calgary —
2019-06-26 825-803 not yet reported which blocks → Iristel Inc. 154E Calgary —
2019-06-26 825-804 not yet reported which blocks → Iristel Inc. 154E Canmore —
2019-06-26 873-531 not yet reported which blocks → TELUS Quebec 2243 Arthabaska —

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.