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
2021-08-31 213-871 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2021-08-31 216-425 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C CLEVELAND OH
2021-08-31 224-416 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E WAUKEGAN IL
2021-08-31 253-367 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2021-08-31 272-446 0–9 XXXall 10 · 4 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 WILKSBARRE PA
2021-08-31 341-205 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2021-08-31 343-576 not yet reported which blocks → Bell Mobility 6574 Ottawa-Hull —
2021-08-31 346-498 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2021-08-31 365-420 not yet reported which blocks → Beanfield Technologies Inc. 575G Ajax-Pickering —
2021-08-31 424-899 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H INGLEWOOD CA
2021-08-31 437-396 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-08-31 475-290 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F DANBURY CT
2021-08-31 530-780 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 REDDING CA
2021-08-31 559-610 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 VISALIA CA
2021-08-31 559-620 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SELMA CA
2021-08-31 580-804 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 WOODWARD OK
2021-08-31 618-761 0XXX1XXX8XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HOFFMAN IL
2021-08-31 618-766 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K IRVINGTON IL
2021-08-31 618-769 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K BARTELSO IL
2021-08-31 618-794 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANITE CY IL
2021-08-31 618-796 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALTON IL
2021-08-31 667-678 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D COLUMBIA MD
2021-08-31 680-422 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H FAYETTEVL NY
2021-08-31 707-860 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SANTA ROSA CA
2021-08-31 707-912 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ST HELENA CA
2021-08-31 708-796 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LA GRANGE IL
2021-08-31 725-259 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 LAS VEGAS NV
2021-08-31 742-201 not yet reported which blocks → Beanfield Technologies Inc. 575G Blackstock —
2021-08-31 742-202 not yet reported which blocks → Beanfield Technologies Inc. 575G Bowmanville —
2021-08-31 742-203 not yet reported which blocks → Beanfield Technologies Inc. 575G Brooklin —
2021-08-31 747-330 0–9 XXXall 10 · 3 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 GLENDALE CA
2021-08-31 840-209 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARROWHEAD CA
2021-08-31 848-314 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PERTHAMBOY NJ
2021-08-31 865-416 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 KNOXVILLE TN
2021-08-31 901-645 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H MEMPHIS TN
2021-08-31 909-818 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MENTONE CA
2021-08-31 914-507 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WSCHSTZN08 NY
2021-08-31 945-218 0–9 XXXall 10 · 4 holders which blocks → LEAP TELECOM, LLC 616J DALLAS TX
2021-08-31 951-593 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HEMT HEMT CA
2021-08-30 720-655 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2021-08-30 725-258 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2021-08-30 814-953 4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - PA 4007 YOUNGSVL PA
2021-08-30 828-617 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NUSO, LLC 478J ASHEVILLE NC
2021-08-27 234-326 0XXX1XXX2XXX3XXX4XXX · 4 holders which blocks → ONVOY, LLC - OH 464C ROOTSTOWN OH
2021-08-27 256-909 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 HARTSELLE AL
2021-08-27 458-274 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CENTRAL PT OR
2021-08-27 479-458 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGDALE AR
2021-08-27 507-803 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANKATO MN
2021-08-27 548-356 not yet reported which blocks → Fibernetics Corporation 464D Cargill —
2021-08-27 548-357 not yet reported which blocks → Fibernetics Corporation 464D Chatsworth —

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.