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 251
WIDE VOICE, LLC - AL 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
2021-07-27 251-860 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H HUXFORD AL
2021-07-27 251-870 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MONROEVL AL
2021-07-27 251-890 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H REPTON AL
2021-07-26 251-830 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H BEATRICE AL
2021-07-26 251-840 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H EXCEL AL
2021-07-23 251-820 0XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ATMORE AL
2021-06-23 251-358 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2021-05-25 251-515 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E BAYMINETTE AL
2021-05-25 251-615 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E FAIRHOPE AL
2021-05-19 251-880 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E ATMORE AL
2021-05-05 251-354 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 GROVE HILL AL
2021-04-14 251-901 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MOBILE AL
2021-03-05 251-349 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL 6804 MOBILE AL
2021-03-05 251-353 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELNYX LLC 073H PETERMAN AL
2021-02-03 251-448 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H MCCULLOUGH AL
2021-02-03 251-449 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FINCHBURG AL
2021-01-25 251-339 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E GOSPORT AL
2021-01-25 251-390 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E BAYOUBATRE AL
2021-01-25 251-420 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - AL 604E BEATRICE AL
2021-01-25 251-430 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E COFFEEVL AL
2021-01-25 251-440 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - AL 604E FRISCOCITY AL
2021-01-25 251-480 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - AL 604E MONROEVL AL
2021-01-25 251-530 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - AL 604E PINE APPLE AL
2021-01-22 251-350 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E BAYMINETTE AL
2021-01-13 251-397 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AL 604E DAUPHIN IS AL
2021-01-06 251-337 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - AL 604E REPTON AL
2021-01-06 251-347 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - AL 604E URIAH AL
2020-12-21 251-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AL 604E MOBILE AL
2020-11-23 251-332 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2020-09-30 251-501 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J MOBILE AL
2020-09-23 251-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H IRNGTNSTEL AL
2020-09-23 251-724 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H MOBILE AL
2020-09-11 251-335 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NUSO, LLC 478J MELVIN AL
2020-08-26 251-329 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2020-08-05 251-346 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H EVERGREEN AL
2020-07-22 251-328 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J MOBILE AL
2020-07-13 251-465 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H MOBILE AL
2020-07-13 251-758 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H MT VERNON AL
2020-07-13 251-766 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H JACKSON AL
2020-07-13 251-842 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H PETERMAN AL
2020-07-13 251-877 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H FOWL RIVER AL
2020-06-11 251-336 0XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H MONROEVL AL
2020-06-11 251-810 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - AL 604E GRAND BAY AL
2020-06-03 251-326 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - AL 5255 MOBILE AL
2020-05-28 251-325 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BAYMINETTE AL
2020-05-12 251-291 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - AL 072F MELVIN AL
2020-04-27 251-323 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MOBILE AL
2020-03-31 251-319 0–9 XXXall 10 · 3 holders which blocks → INTRADO COMMUNICATIONS LLC 807C MOBILE AL
2019-12-02 251-356 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H FINCHBURG AL
2019-12-02 251-529 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H MOBILE AL

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.