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
2021-09-27 341-210 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2021-09-27 352-910 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J LEESBURG FL
2021-09-27 365-371 not yet reported which blocks → Fibernetics Corporation 464D Binbrook —
2021-09-27 365-372 not yet reported which blocks → Fibernetics Corporation 464D Hagersville —
2021-09-27 365-373 not yet reported which blocks → Fibernetics Corporation 464D West Lincoln —
2021-09-27 365-374 not yet reported which blocks → Fibernetics Corporation 464D Winona —
2021-09-27 365-812 not yet reported which blocks → Fibernetics Corporation 464D Blackstock —
2021-09-27 365-813 not yet reported which blocks → Fibernetics Corporation 464D Hampton —
2021-09-27 365-814 not yet reported which blocks → Fibernetics Corporation 464D Newtonville —
2021-09-27 365-815 not yet reported which blocks → Fibernetics Corporation 464D Orono —
2021-09-27 475-291 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2021-09-27 475-296 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2021-09-27 475-297 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F NEWTOWN CT
2021-09-27 502-218 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 LAWRENCEBG KY
2021-09-27 548-540 not yet reported which blocks → Fibernetics Corporation 464D Atwood —
2021-09-27 548-541 not yet reported which blocks → Fibernetics Corporation 464D Dublin —
2021-09-27 548-542 not yet reported which blocks → Fibernetics Corporation 464D Harriston —
2021-09-27 548-543 not yet reported which blocks → Fibernetics Corporation 464D Mitchell —
2021-09-27 548-544 not yet reported which blocks → Fibernetics Corporation 464D Monkton —
2021-09-27 548-545 not yet reported which blocks → Fibernetics Corporation 464D Palmerston —
2021-09-27 548-546 not yet reported which blocks → Fibernetics Corporation 464D Shakespeare —
2021-09-27 548-547 not yet reported which blocks → Fibernetics Corporation 464D St. Marys —
2021-09-27 548-549 not yet reported which blocks → Fibernetics Corporation 464D Tavistock —
2021-09-27 571-545 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN17 VA
2021-09-27 572-203 0XXX1XXX3XXX4XXX · 2 holders which blocks → CSC VOICE, LLC 612K NOBLE OK
2021-09-27 572-215 0XXX1XXX2XXX5XXX · 3 holders which blocks → CSC VOICE, LLC 612K WAYNE OK
2021-09-27 657-523 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 GARDEN GRV CA
2021-09-27 659-243 0–9 XXXall 10 · 3 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 PELL CITY AL
2021-09-27 662-758 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AIRUS, INC. - MS 459H KOSCIUSKO MS
2021-09-27 667-351 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2021-09-27 680-477 0XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H OWASCO NY
2021-09-27 775-484 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 478J RENO NV
2021-09-27 872-290 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN10 IL
2021-09-27 901-445 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TN 124F COVINGTON TN
2021-09-27 912-603 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BRUNSWICK GA
2021-09-27 930-250 0XXX1XXX2XXX3XXX4XXX · 2 holders which blocks → NUSO, LLC 478J TERREHAUTE IN
2021-09-27 934-344 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H WADING RIV NY
2021-09-27 949-704 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E TRABUCO CA
2021-09-27 959-261 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 SOUTHINGTN CT
2021-09-24 249-295 not yet reported which blocks → TekSavvy Solutions Inc 548H Pefferlaw —
2021-09-24 249-296 not yet reported which blocks → TekSavvy Solutions Inc 548H Udora —
2021-09-24 256-936 0–9 XXXall 10 · 5 holders which blocks → AIRUS, INC. - AL 476H HUNTSVILLE AL
2021-09-24 256-939 0–9 XXXall 10 · 2 holders which blocks → AIRUS, INC. - AL 476H CULLMAN AL
2021-09-24 365-547 not yet reported which blocks → TekSavvy Solutions Inc 548H Kleinburg —
2021-09-24 365-548 not yet reported which blocks → TekSavvy Solutions Inc 548H Maple —
2021-09-24 365-549 not yet reported which blocks → TekSavvy Solutions Inc 548H Markham —
2021-09-24 365-554 not yet reported which blocks → TekSavvy Solutions Inc 548H Newmarket —
2021-09-24 365-561 not yet reported which blocks → TekSavvy Solutions Inc 548H Mount Albert —
2021-09-24 365-562 not yet reported which blocks → TekSavvy Solutions Inc 548H Nobleton —
2021-09-24 365-563 not yet reported which blocks → TekSavvy Solutions Inc 548H Oak Ridges —

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.