NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 567
8X8, INC. 1
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
2021-11-22 567-463 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ASHLAND OH
2021-11-08 567-366 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PT CLINTON OH
2021-10-25 567-359 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANSFIELD OH
2021-10-25 567-500 0XXX1XXX2XXX5XXX · 4 holders which blocks → FRACTEL, LLC 965H ATTICA OH
2021-09-03 567-365 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OH 464C BOWLNGGREN OH
2021-06-24 567-358 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J SYLVANIA OH
2021-06-21 567-355 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C GALION OH
2021-06-09 567-499 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H ELIDA OH
2021-04-26 567-397 0XXX6XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MELMORE OH
2021-04-16 567-799 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DUNKIRK OH
2021-04-15 567-388 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H BLUFFTON OH
2021-04-15 567-566 0XXX1XXX2XXX5XXX6XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H BEAVERDAM OH
2021-04-15 567-577 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ADARIO OH
2021-04-15 567-588 0XXX1XXX2XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ADA OH
2021-04-15 567-599 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H GENOA OH
2021-04-15 567-688 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H CHESTERFLD OH
2021-04-15 567-699 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H ASHLAND OH
2021-04-15 567-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H TOLEDO OH
2021-04-13 567-927 0XXX3XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SYCAMORE OH
2021-04-13 567-981 0XXX which blocks → TWC IP ENABLED SERVICES, LLC 793K MCUTCHENVL OH
2021-04-06 567-550 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C MONTPELIER OH
2021-03-25 567-353 0XXX1XXX2XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → TELNYX LLC 073H DELPHOS OH
2020-12-23 567-346 0XXX1XXX2XXX3XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F MARENGO OH
2020-12-14 567-887 2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FREMONT OH
2020-10-22 567-332 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C FINDLAY OH
2020-10-06 567-329 0–9 XXXall 10 · 2 holders which blocks → IP HORIZON LLC 515J TOLEDO OH
2020-09-30 567-327 0–9 XXXall 10 · 3 holders which blocks → IP HORIZON LLC 515J MANSFIELD OH
2020-09-08 567-758 0XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FREMONT OH
2020-09-08 567-786 2XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H REDHAW OH
2020-09-08 567-842 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H LAKEVILLE OH
2020-09-01 567-326 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J TOLEDO OH
2020-08-04 567-317 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → HD CARRIER LLC 321J TOLEDO OH
2020-07-08 567-732 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H ELMORE OH
2020-07-08 567-788 0XXX4XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H MARIASTEIN OH
2020-07-08 567-896 0XXX2XXX6XXX7XXX · 3 holders which blocks → FRACTEL, LLC 965H PUT IN BAY OH
2020-07-08 567-946 3XXX4XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H CRIDERSVL OH
2020-06-02 567-313 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C CARDINGTON OH
2020-05-28 567-367 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OH 464C REPUBLIC OH
2020-05-28 567-399 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OH 464C ALGER OH
2020-05-28 567-405 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OH 464C CALEDONIA OH
2020-05-26 567-350 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C CAREY OH
2020-05-26 567-372 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C FOREST OH
2020-05-26 567-557 0XXX1XXX2XXX3XXX5XXX7XXX · 2 holders which blocks → ONVOY, LLC - OH 464C MILAN OH
2020-05-26 567-587 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - OH 464C MTBLANCHAD OH
2020-05-20 567-304 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J TOLEDO OH
2020-05-20 567-306 0–9 XXXall 10 · 2 holders which blocks → CSC WIRELESS, LLC 425J MANSFIELD OH
2020-04-06 567-282 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MANSFIELD OH
2020-02-24 567-667 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H EDON OH
2020-02-24 567-677 0XXX1XXX2XXX6XXX7XXX8XXX · 3 holders which blocks → ONVOY, LLC - OH 464C VAN BUREN OH
2020-02-14 567-362 0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H BETTSVILLE OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.