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
2021-09-03 516-919 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J NASSAUZN02 NY
2021-09-03 517-297 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HILLSDALE MI
2021-09-03 517-633 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ADRIAN MI
2021-09-03 520-563 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → IP HORIZON LLC 515J BENSON AZ
2021-09-03 520-564 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J DOUGLAS AZ
2021-09-03 520-567 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J HAYDEN AZ
2021-09-03 520-569 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J SAN MANUEL AZ
2021-09-03 520-581 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → IP HORIZON LLC 515J TOMBSTONE AZ
2021-09-03 520-583 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J WHITLOW AZ
2021-09-03 567-365 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C BOWLNGGREN OH
2021-09-03 616-315 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2021-09-03 616-341 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GRAND RPDS MI
2021-09-03 659-299 0XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E LINCOLN AL
2021-09-03 659-399 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - AL 604E WARRIOR AL
2021-09-03 659-499 0XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E FLATWOOD AL
2021-09-03 659-674 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PINSON AL
2021-09-03 659-699 0XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E LISMAN AL
2021-09-03 659-799 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AL 604E PINSON AL
2021-09-03 680-228 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 SENECA FLS NY
2021-09-03 689-250 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J WINTERPARK FL
2021-09-03 689-251 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ORLANDO FL
2021-09-03 737-678 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DRIPPNGSPG TX
2021-09-03 737-762 0–9 XXXall 10 · 9 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SMITHVILLE TX
2021-09-03 765-694 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LAFAYETTE IN
2021-09-03 786-813 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 MIAMI FL
2021-09-03 830-347 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 MARBLE FLS TX
2021-09-03 839-206 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 NEWBERRY SC
2021-09-03 863-290 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → IP HORIZON LLC 515J INDIANLAKE FL
2021-09-03 863-296 0–9 XXXall 10 · 6 holders which blocks → IP HORIZON LLC 515J LAKE WALES FL
2021-09-03 904-984 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J JACKSONVL FL
2021-09-03 907-215 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J ANCHORAGE AK
2021-09-03 928-426 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J PRESCOTT AZ
2021-09-03 928-430 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J SOMERTON AZ
2021-09-02 239-744 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J FORT MYERS FL
2021-09-02 352-756 0–9 XXXall 10 · 4 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J GAINESVL FL
2021-09-02 352-844 0–9 XXXall 10 · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J OCALA FL
2021-09-02 386-477 0–9 XXXall 10 · 3 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J LIVE OAK FL
2021-09-02 386-488 1XXX2XXX3XXX8XXX · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J DAYTONABCH FL
2021-09-02 442-365 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VTVL APVY CA
2021-09-02 516-915 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NASSAUZN09 NY
2021-09-02 657-520 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ANA CA
2021-09-02 661-580 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PLDL PLDL CA
2021-09-02 904-709 0–9 XXXall 10 · 9 holders which blocks → IP HORIZON LLC 515J PNTVDRABCH FL
2021-09-02 904-734 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J MIDDLEBURG FL
2021-09-02 904-740 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J MAXVILLE FL
2021-09-02 949-692 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAGUNA BCH CA
2021-09-01 218-880 0XXX1XXX7XXX8XXX9XXX · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J MOORHEAD MN
2021-09-01 240-798 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - MD 876D GAITHERSBG MD
2021-09-01 240-807 0–9 XXXall 10 · 6 holders which blocks → USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD 4720 CUMBERLAND MD
2021-09-01 240-809 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D SMITHSBURG MD

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.