NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
2021-08-03 571-576 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E MANASSAS VA
2021-08-03 575-277 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS CRUCES NM
2021-08-03 579-493 not yet reported which blocks → Fibernetics Corporation 464D Sorel —
2021-08-03 579-494 not yet reported which blocks → Fibernetics Corporation 464D Pierreville —
2021-08-03 579-495 not yet reported which blocks → Fibernetics Corporation 464D St-Denis —
2021-08-03 579-496 not yet reported which blocks → Fibernetics Corporation 464D St-Pie-de-Guire —
2021-08-03 579-497 not yet reported which blocks → Fibernetics Corporation 464D St-Zephirin —
2021-08-03 579-498 not yet reported which blocks → Fibernetics Corporation 464D Yamaska —
2021-08-03 579-515 not yet reported which blocks → Fibernetics Corporation 464D St-Chrysostome —
2021-08-03 579-516 not yet reported which blocks → Fibernetics Corporation 464D St-Constant —
2021-08-03 579-517 not yet reported which blocks → Fibernetics Corporation 464D St-Remi —
2021-08-03 579-518 not yet reported which blocks → Fibernetics Corporation 464D Ste-Martine —
2021-08-03 582-558 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - PA 547E OIL CITY PA
2021-08-03 754-277 0–9 XXXall 10 · 3 holders which blocks → BARR TELL USA, LLC 632K FTLAUDERDL FL
2021-08-03 762-462 0XXX1XXX2XXX5XXX6XXX7XXX · 6 holders which blocks → ONVOY, LLC - GA 067D HOGANSVL GA
2021-08-03 762-662 0XXX1XXX2XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → ONVOY, LLC - GA 067D RUTLEDGE GA
2021-08-03 762-764 0XXX1XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → ONVOY, LLC - GA 067D DANIELSVL GA
2021-08-03 762-861 0XXX2XXX3XXX7XXX · 3 holders which blocks → ONVOY, LLC - GA 067D WARRENTON GA
2021-08-03 762-962 0XXX1XXX2XXX5XXX · 4 holders which blocks → ONVOY, LLC - GA 067D WOODBURY GA
2021-08-03 786-869 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, LLC 632K PERRINE FL
2021-08-03 802-306 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - VT 451F UNDERHILL VT
2021-08-03 872-287 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN03 IL
2021-08-02 564-222 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H SILVERDALE WA
2021-08-02 626-663 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H AZUSA CA
2021-08-02 626-772 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H COVINA CA
2021-08-02 626-880 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2021-08-02 626-978 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EL MONTE CA
2021-08-02 682-445 0–9 XXXall 10 · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ARLINGTON TX
2021-08-02 806-739 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 OLTON TX
2021-08-02 915-286 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C CLINT TX
2021-07-30 269-307 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C STURGIS MI
2021-07-30 305-990 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, LLC 632K KEYS FL
2021-07-30 314-794 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MO 093F OAKVILLE MO
2021-07-30 334-325 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F PRATTVILLE AL
2021-07-30 346-855 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H BAYTOWN TX
2021-07-30 413-428 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 AMHERST MA
2021-07-30 424-451 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN PEDRO CA
2021-07-30 442-362 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISTA CA
2021-07-30 561-695 0–9 XXXall 10 · 3 holders which blocks → BARR TELL USA, LLC 632K DELRAY BCH FL
2021-07-30 561-730 0–9 XXXall 10 · 5 holders which blocks → BARR TELL USA, LLC 632K JUPITER FL
2021-07-30 561-830 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, LLC 632K BOYNTONBCH FL
2021-07-30 586-334 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C ROSEVILLE MI
2021-07-30 785-612 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 5 holders which blocks → ONVOY, LLC - KS 205F PHILLIPSBG KS
2021-07-30 786-827 0–9 XXXall 10 · 5 holders which blocks → BARR TELL USA, LLC 632K HOMESTEAD FL
2021-07-30 786-861 0–9 XXXall 10 · 4 holders which blocks → BARR TELL USA, LLC 632K MIAMI FL
2021-07-30 936-466 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H NEWWAVERLY TX
2021-07-30 936-866 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H DAYTON TX
2021-07-30 979-946 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ANGLETON TX
2021-07-29 213-565 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2021-07-29 213-578 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.