NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-09-03 430-465 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H WHITEHOUSE TX
2020-09-03 437-273 not yet reported which blocks → Bell Mobility 6574 Toronto —
2020-09-03 469-887 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ROCKWALL TX
2020-09-03 469-890 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F GRANDPRARI TX
2020-09-03 469-946 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LEWISVILLE TX
2020-09-03 475-303 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J GREENWICH CT
2020-09-03 501-439 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 ENGLAND AR
2020-09-03 505-499 4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H ZUNI NM
2020-09-03 505-799 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H VANDERWGON NM
2020-09-03 515-842 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H VAN METER IA
2020-09-03 539-336 6XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H CEDARCREST OK
2020-09-03 539-356 7XXX9XXX which blocks → FRACTEL, LLC 965H HITCHITA OK
2020-09-03 539-465 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H AFTON OK
2020-09-03 539-946 3XXX which blocks → FRACTEL, LLC 965H FORAKER OK
2020-09-03 561-532 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 JUPITER FL
2020-09-03 575-786 7XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H RODEO NM
2020-09-03 575-842 3XXX5XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MAGDALENA NM
2020-09-03 575-945 0XXX2XXX3XXX5XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LOGAN NM
2020-09-03 608-389 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - WI 007F BARABOO WI
2020-09-03 682-348 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FORT WORTH TX
2020-09-03 682-758 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H ARLINGTON TX
2020-09-03 720-769 0–9 XXXall 10 · 2 holders which blocks → VONAGE AMERICA LLC 197D DENVER CO
2020-09-03 737-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H PAIGE TX
2020-09-03 737-877 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BUDA TX
2020-09-03 737-946 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H ADAMSVILLE TX
2020-09-03 830-288 2XXX6XXX8XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CENTER PT TX
2020-09-03 830-314 1XXX2XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 COMFORT TX
2020-09-03 857-755 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H QUINCY MA
2020-09-03 873-485 not yet reported which blocks → TELUS Quebec 2243 Arundel —
2020-09-03 873-488 not yet reported which blocks → TELUS Quebec 2243 Weedon —
2020-09-03 901-558 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 MEMPHIS TN
2020-09-03 916-530 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2020-09-03 949-604 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SADLBK VLY CA
2020-09-03 954-231 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C DEERFLDBCH FL
2020-09-03 954-287 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C CORAL SPG FL
2020-09-03 985-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HOUMA LA
2020-09-02 210-934 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C SANANTONIO TX
2020-09-02 239-488 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BONITA SPG FL
2020-09-02 239-667 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H IMMOKALEE FL
2020-09-02 239-799 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NAPLES FL
2020-09-02 239-899 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H FTMYERSBCH FL
2020-09-02 240-736 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 LAUREL236 MD
2020-09-02 307-225 0–9 XXXall 10 · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K LARAMIE WY
2020-09-02 313-479 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DETROITZN6 MI
2020-09-02 313-513 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C DETROITZN1 MI
2020-09-02 313-631 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C DETROITZN2 MI
2020-09-02 313-634 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C DETROITZN3 MI
2020-09-02 313-763 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C DETROITZN5 MI
2020-09-02 316-370 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WICHITA KS
2020-09-02 321-346 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H TITUSVILLE FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.