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
2021-07-20 346-484 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C SHELDON TX
2021-07-20 346-485 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HUFFMAN TX
2021-07-20 351-225 2XXX3XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - MA 892D BERLIN MA
2021-07-20 401-373 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - RI 977E CENTREDALE RI
2021-07-20 437-328 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-07-20 437-891 not yet reported which blocks → Fibernetics Corporation 464D Toronto —
2021-07-20 438-769 not yet reported which blocks → Fibernetics Corporation 464D Montreal —
2021-07-20 563-314 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DORCHESTER IA
2021-07-20 563-317 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOSPGGROVE IA
2021-07-20 582-758 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRACTEL, LLC 965H ALEXANDRIA PA
2021-07-20 582-842 0XXX1XXX3XXX5XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H KANE PA
2021-07-20 586-325 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C NEWBALTIMR MI
2021-07-20 616-314 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C ADA MI
2021-07-20 617-518 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MA 892D CHARLESTN MA
2021-07-20 619-936 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2021-07-20 682-355 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
2021-07-20 775-479 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PARADISVLY NV
2021-07-20 782-589 not yet reported which blocks → Fibernetics Corporation 464D Kennetcook —
2021-07-20 782-590 not yet reported which blocks → Fibernetics Corporation 464D Ketch Harbour —
2021-07-20 782-591 not yet reported which blocks → Fibernetics Corporation 464D LaHave —
2021-07-20 782-592 not yet reported which blocks → Fibernetics Corporation 464D Lake Charlotte —
2021-07-20 782-593 not yet reported which blocks → Fibernetics Corporation 464D Lunenburg —
2021-07-20 839-205 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - SC 5258 LEXINGTON SC
2021-07-20 845-529 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H CLINTONCOR NY
2021-07-20 945-206 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C FARMERSVL TX
2021-07-19 470-857 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - GA 7435 ATLANTA NE GA
2021-07-19 520-553 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CASAGRANDE AZ
2021-07-19 531-345 3XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H LINDSAY NE
2021-07-19 531-356 7XXX9XXX which blocks → FRACTEL, LLC 965H BUTTE NE
2021-07-19 548-331 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Simcoe —
2021-07-19 548-843 not yet reported which blocks → Brooke Telecom Co-operative Ltd. 692G Petrolia —
2021-07-19 563-310 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HAWKEYE IA
2021-07-19 563-312 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOSTNATION IA
2021-07-19 575-261 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 RESERVE NM
2021-07-19 575-269 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 QUEMADO NM
2021-07-19 641-246 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORA SPG IA
2021-07-19 641-249 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LINEVILLE IA
2021-07-19 641-719 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEMONS IA
2021-07-19 657-513 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2021-07-19 672-588 not yet reported which blocks → Fido Solutions Inc. 5643 Abbotsford —
2021-07-19 707-908 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BENICIA CA
2021-07-19 724-233 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J WAMPUM PA
2021-07-19 762-312 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 THOMASTON GA
2021-07-19 825-819 not yet reported which blocks → Iristel Inc. 154E Red Deer —
2021-07-19 825-824 not yet reported which blocks → Iristel Inc. 154E Fort McMurray —
2021-07-19 825-870 not yet reported which blocks → Iristel Inc. 154E Jasper —
2021-07-19 873-643 not yet reported which blocks → Bell Mobility 6574 Sherbrooke —
2021-07-19 873-961 not yet reported which blocks → SSi Micro Ltd. 940G Chisasibi —
2021-07-19 873-962 not yet reported which blocks → SSi Micro Ltd. 940G Wemindji —
2021-07-19 928-410 0XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GANADO AZ

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.