NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2022-01-26 240-921 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2022-01-26 240-923 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN6 MD
2022-01-26 254-683 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KILLEEN TX
2022-01-26 260-299 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF INDIANA, LLC - IN 279F FORT WAYNE IN
2022-01-26 272-464 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MTPLSANTML PA
2022-01-26 272-624 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MOUNTANTOP PA
2022-01-26 332-378 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NWYRCYZN01 NY
2022-01-26 346-549 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2022-01-26 364-867 5XXX6XXX · 2 holders which blocks → COMMIO, LLC 939H OWENSBORO KY
2022-01-26 430-866 2XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BENFRNKLIN TX
2022-01-26 437-264 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2022-01-26 437-265 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2022-01-26 437-267 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2022-01-26 437-268 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2022-01-26 437-269 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2022-01-26 442-522 0XXX2XXX5XXX · 3 holders which blocks → FRACTEL, LLC 965H PARKER DAM CA
2022-01-26 458-433 0XXX1XXX6XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VALE OR
2022-01-26 563-351 1XXX3XXX4XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 DURANT IA
2022-01-26 572-226 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F BINGER OK
2022-01-26 575-287 0XXX1XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NM 123F JAL NM
2022-01-26 641-508 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 OSCEOLA IA
2022-01-26 659-675 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JASPER AL
2022-01-26 662-923 0XXX1XXX3XXX7XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SO MOSCOW MS
2022-01-26 662-925 0XXX1XXX3XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RED BAY MS
2022-01-26 662-946 4XXX which blocks → TON80 COMMUNICATIONS, LLC 516J ARTESICWFD MS
2022-01-26 712-671 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - IA 9877 SHENANDOAH IA
2022-01-26 720-905 0–9 XXXall 10 · 5 holders which blocks → FIVE9, INC. 598J DENVER CO
2022-01-26 737-314 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2022-01-26 737-378 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KYLE TX
2022-01-26 743-770 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → COMMIO, LLC 939H REIDSVILLE NC
2022-01-26 769-366 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JACKSON MS
2022-01-26 779-466 3XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J EMINGTON IL
2022-01-26 805-997 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H OJAI CA
2022-01-26 828-603 0XXX1XXX2XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E LIBERTY-CH NC
2022-01-26 828-723 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORGANTON NC
2022-01-26 864-966 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FOUNTANINN SC
2022-01-26 910-360 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H LUMBERTON NC
2022-01-26 910-913 0XXX1XXX2XXX3XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E ELIZABTHTN NC
2022-01-26 940-639 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J VLY VIEW E TX
2022-01-26 941-466 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOCAGRANDE FL
2022-01-26 945-243 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-244 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-246 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-247 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2022-01-26 945-599 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TERRELL TX
2022-01-26 979-675 3XXX which blocks → TON80 COMMUNICATIONS, LLC 516J NEW ULM TX
2022-01-26 980-998 0–9 XXXall 10 · 2 holders which blocks → COMMIO, LLC 939H SALISBURY NC
2022-01-25 236-799 not yet reported which blocks → Iristel Inc. 154E Quesnel —
2022-01-25 239-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NAPLES FL
2022-01-25 252-580 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ELIZABTHCY NC

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.