NumberResearch Membership · Data 09/28/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19
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
2019-10-11 779-758 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H JOLIET IL
2019-10-11 857-356 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2019-10-11 902-510 not yet reported which blocks → Iristel Inc. 154E Caledonia —
2019-10-11 902-517 not yet reported which blocks → Iristel Inc. 154E Antigonish —
2019-10-11 902-518 not yet reported which blocks → Iristel Inc. 154E Bridgewater —
2019-10-11 912-494 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D ST GEORGE GA
2019-10-11 985-334 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MANDEVILLE LA
2019-10-10 224-317 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 LAKEFOREST IL
2019-10-10 224-348 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ALGONQUIN IL
2019-10-10 224-933 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H ROUND LAKE IL
2019-10-10 224-977 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NORTHBROOK IL
2019-10-10 231-400 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C ALANSON MI
2019-10-10 231-500 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C WHITEHALL MI
2019-10-10 240-873 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D BUCKEYSTN MD
2019-10-10 240-874 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - MD 876D THURMONT MD
2019-10-10 240-875 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MD 876D MOUNT AIRY MD
2019-10-10 252-300 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - NC 638E GRIFTON NC
2019-10-10 252-400 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - NC 638E ATLANTIC NC
2019-10-10 252-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - NC 638E SNOW HILL NC
2019-10-10 302-550 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - DE 969E LEWES DE
2019-10-10 302-770 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - DE 969E MILTON DE
2019-10-10 307-300 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - WY 450F POWELL WY
2019-10-10 314-788 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H ST LOUIS MO
2019-10-10 331-356 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H BARTLETT IL
2019-10-10 351-222 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D MERRIMAC MA
2019-10-10 351-300 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MA 892D HARVARD MA
2019-10-10 413-414 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MA 892D HINSDALE MA
2019-10-10 413-415 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - MA 892D AMHRSTFKLN MA
2019-10-10 430-710 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H TEXARKANA TX
2019-10-10 431-276 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2019-10-10 463-710 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H INDIANAPLS IN
2019-10-10 479-900 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AR 348F FAYETTEVL AR
2019-10-10 501-770 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AR 348F WRIGHTSVL AR
2019-10-10 501-790 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - AR 348F PARON AR
2019-10-10 513-810 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H CINCINNATI OH
2019-10-10 517-300 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C ONSTED MI
2019-10-10 548-488 not yet reported which blocks → Iristel Inc. 154E London —
2019-10-10 548-489 not yet reported which blocks → Iristel Inc. 154E London —
2019-10-10 567-710 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H LIMA OH
2019-10-10 581-909 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2019-10-10 586-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C NEWBALTIMR MI
2019-10-10 630-349 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D ELMHURST IL
2019-10-10 647-481 not yet reported which blocks → Bell Mobility 6574 Toronto —
2019-10-10 659-444 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E TRUSSVILLE AL
2019-10-10 659-666 0–9 XXXall 10 · 8 holders which blocks → ONVOY, LLC - AL 604E FAYETTE AL
2019-10-10 659-777 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - AL 604E DETROIT AL
2019-10-10 659-900 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E SULLIGENT AL
2019-10-10 659-999 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - AL 604E WINFIELD AL
2019-10-10 667-660 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - MD 876D MARION MD
2019-10-10 667-661 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MD 876D SNOW HILL MD

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.