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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-11-02 458-275 0XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CRESWELL OR
2021-11-02 464-333 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HARVEY IL
2021-11-02 464-444 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BEECHER IL
2021-11-02 464-600 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H FOREST IL
2021-11-02 464-666 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H CALUMET CY IL
2021-11-02 464-777 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H WILLOW SPG IL
2021-11-02 464-800 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H TINLEYPARK IL
2021-11-02 464-888 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ORLAND IL
2021-11-02 531-279 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NE 5807 GENOA NE
2021-11-02 629-270 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H NASHVILLE TN
2021-11-02 669-499 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SNJS NORTH CA
2021-11-02 682-363 0XXX1XXX3XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F ROANOKE TX
2021-11-02 719-414 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CO 026D LAS ANIMAS CO
2021-11-02 737-312 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C KYLE TX
2021-11-02 769-273 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H JACKSON MS
2021-11-02 913-408 0–9 XXXall 10 · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY KS
2021-11-02 945-230 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2021-11-02 956-646 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DONNA TX
2021-11-02 956-663 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C EDINBURG TX
2021-11-01 223-267 0–9 XXXall 10 · 5 holders which blocks → D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE 6846 HANOVER PA
2021-11-01 229-283 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 FITZGERALD GA
2021-11-01 321-376 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL
2021-11-01 346-520 0–9 XXXall 10 · 2 holders which blocks → CALLWORKS CORPORATION 475J HOUSTON TX
2021-11-01 445-219 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHPHSBZN39 PA
2021-11-01 448-201 0–9 XXXwhole prefix which blocks → POWERTEL JACKSONVILLE LICENSES, INC. 7472 BONIFAY FL
2021-11-01 559-607 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E DINUBA CA
2021-11-01 659-245 0XXX1XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → COMMIO, LLC 939H VERNON AL
2021-11-01 667-358 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 EASTON MD
2021-11-01 708-773 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H CHICAGOHTS IL
2021-11-01 737-309 0–9 XXXall 10 · 3 holders which blocks → CALLWORKS CORPORATION 475J AUSTIN TX
2021-11-01 742-889 not yet reported which blocks → ISP Telecom Inc. 4727 Wainfleet —
2021-11-01 742-890 not yet reported which blocks → ISP Telecom Inc. 4727 Wellandport —
2021-11-01 865-422 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KNOXVILLE TN
2021-11-01 934-221 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SMITHTOWN NY
2021-11-01 945-229 0–9 XXXall 10 · 6 holders which blocks → CALLWORKS CORPORATION 475J DALLAS TX
2021-11-01 947-238 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTHFIELD MI
2021-10-29 231-396 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C CADILLAC MI
2021-10-29 346-519 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F CHANNELVW TX
2021-10-29 442-370 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 INDIO CA
2021-10-29 586-326 0XXX3XXX4XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C RICHMOND MI
2021-10-29 615-623 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F GALLATIN TN
2021-10-29 615-639 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F DICKSON TN
2021-10-29 615-652 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F PORTLAND TN
2021-10-29 616-342 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C HUDSONVL MI
2021-10-29 618-807 0XXX9XXX · 2 holders which blocks → COMMIO, LLC 939H ALHAMBRA IL
2021-10-29 618-809 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 MT VERNON IL
2021-10-29 618-866 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BELLEVILLE IL
2021-10-29 618-955 5XXX9XXX · 2 holders which blocks → FRACTEL, LLC 965H ADDIEVILLE IL
2021-10-29 619-943 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-10-29 629-269 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F HENDERSNVL TN

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.