NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-06-29 805-803 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SANTAMARIA CA
2018-06-29 873-542 not yet reported which blocks → Videotron Ltd. 8306 Wotton —
2018-06-29 907-872 0XXX which blocks → OPTIMERA INC. 158J UNALASKA AK
2018-06-29 910-310 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CHADBOURN NC
2018-06-29 989-263 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E BEAVERTON MI
2018-06-28 236-330 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2018-06-28 319-207 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 MORLEY IA
2018-06-28 352-604 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E GROVELAND FL
2018-06-28 365-588 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Dunnville —
2018-06-28 431-339 not yet reported which blocks → Bell Mobility 6574 Selkirk —
2018-06-28 438-341 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-06-28 563-236 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ANDREW IA
2018-06-28 563-240 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 LAMOTTE IA
2018-06-28 563-266 2XXX5XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BERNARD IA
2018-06-28 563-268 2XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 BALDWIN IA
2018-06-28 563-269 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CASCADE IA
2018-06-28 563-270 0XXX2XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 CENTER JCT IA
2018-06-28 563-273 2XXX3XXX6XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 ONSLOW IA
2018-06-28 563-274 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OTTERCREEK IA
2018-06-28 581-749 not yet reported which blocks → Videotron Ltd. 8306 Saint-Henri-de-Levis —
2018-06-28 647-394 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-06-28 717-973 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F MIFFLINTN PA
2018-06-28 725-206 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2018-06-28 825-407 not yet reported which blocks → TELUS 8084 Calgary —
2018-06-28 873-533 not yet reported which blocks → TELUS Quebec 2243 St-Sebastien (Frontenac Co.) —
2018-06-28 873-540 not yet reported which blocks → Videotron Ltd. 8306 Chartierville —
2018-06-28 873-541 not yet reported which blocks → Videotron Ltd. 8306 Sawyerville —
2018-06-28 928-260 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E WIKIEUP AZ
2018-06-27 346-345 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2018-06-27 438-340 not yet reported which blocks → Bell Mobility 6574 Montreal —
2018-06-27 469-491 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CARROLLTON TX
2018-06-27 612-398 0–9 XXXall 10 · 3 holders which blocks → ADVANCED TELECOM SOLUTIONS, LLC 181J TWINCITIES MN
2018-06-27 808-746 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - HI 003J HILO HI
2018-06-27 831-889 0–9 XXXall 10 · 5 holders which blocks → UTILITY TELECOM GROUP, LLC - CA 9262 SANTA CRUZ CA
2018-06-26 249-507 not yet reported which blocks → Iristel Inc. 154E Sault Ste. Marie —
2018-06-26 434-206 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CLARKSVL VA
2018-06-26 434-273 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 SOBRUNSWIK VA
2018-06-26 434-302 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 JARRATT VA
2018-06-26 434-313 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 LAWRENCEVL VA
2018-06-26 540-281 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BLUEMONT VA
2018-06-26 540-306 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BOYCE VA
2018-06-26 540-472 0–9 XXXall 10 · 4 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 BROKENBURG VA
2018-06-26 540-501 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 CRIGLERSVL VA
2018-06-26 540-502 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 GAINESBORO VA
2018-06-26 540-503 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 GORE VA
2018-06-26 540-506 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 MARSHALL VA
2018-06-26 540-513 0–9 XXXall 10 · 6 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 ORANGE VA
2018-06-26 540-516 0–9 XXXall 10 · 2 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 SHENANDHPK VA
2018-06-26 540-517 0–9 XXXall 10 · 3 holders which blocks → CORETEL VIRGINIA, LLC - VA 5832 SPERRYVL VA
2018-06-26 540-528 0–9 XXXwhole prefix which blocks → CORETEL VIRGINIA, LLC - VA 5832 THE PLAINS VA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.