NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 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, all time — NPA 325
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 61
SOUTHWESTERN BELL 39
NEW CINGULAR WIRELESS PCS, LLC - IL 35
ONVOY, LLC - TX 32
24
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
2022-06-16 325-275 0–9 XXXall 10 · 3 holders which blocks → PAETEC ITEL, LLC 829J ABILENE TX
2022-02-15 325-324 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BALLINGER TX
2022-02-02 325-352 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ABILENE TX
2021-11-12 325-314 0XXX1XXX7XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H ANSON TX
2021-11-12 325-316 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H COLORADOCY TX
2021-11-11 325-299 0XXX1XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H STAMFORD TX
2021-11-11 325-306 0XXX1XXX6XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ROTAN TX
2021-09-28 325-297 1XXX2XXX4XXX5XXX6XXX7XXX which blocks → NUSO, LLC 478J SAN ANGELO TX
2021-09-28 325-298 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J ABILENE TX
2021-09-03 325-355 5XXX which blocks → SKYE TELECOM LLC DBA SKYETEL 622J SAN ANGELO TX
2021-09-03 325-433 0–9 XXXall 10 · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J ABILENE TX
2021-09-03 325-488 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J BROWNWOOD TX
2021-07-27 325-296 0XXX1XXX2XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H COLEMAN TX
2021-07-20 325-295 0XXX2XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - TX 903C MORAN TX
2021-05-10 325-699 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H WINTERS TX
2021-05-10 325-799 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H ROWENA TX
2021-05-07 325-292 0XXX4XXX · 2 holders which blocks → TELNYX LLC 073H SAN ANGELO TX
2021-05-07 325-293 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → TELNYX LLC 073H SNYDER TX
2021-05-06 325-867 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → COMMIO, LLC 939H SAN ANGELO TX
2021-04-14 325-901 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H ABILENE TX
2021-01-15 325-567 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BANGS TX
2021-01-15 325-789 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H JUNCTION TX
2021-01-11 325-336 8XXX which blocks → FRACTEL, LLC 965H BIG VALLEY TX
2021-01-11 325-533 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C MILES TX
2021-01-08 325-290 0XXX1XXX2XXX3XXX5XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C OZONA TX
2021-01-08 325-291 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C STERLINGCY TX
2020-12-18 325-910 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - TX 903C BRADY TX
2020-12-16 325-532 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C ALBANY TX
2020-12-08 325-310 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C ABILENE TX
2020-12-08 325-610 0XXX2XXX3XXX4XXX6XXX which blocks → ONVOY, LLC - TX 903C SAN ANGELO TX
2020-10-26 325-322 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C LLANO TX
2020-09-28 325-289 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J ABILENE TX
2020-09-21 325-747 0–9 XXXwhole prefix which blocks → CSC VOICE, LLC 612K SAN ANGELO TX
2020-09-17 325-287 1XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → IP HORIZON LLC 515J SAN ANGELO TX
2020-08-20 325-345 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H BAIRD TX
2020-07-10 325-577 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H ELDORADO TX
2020-03-26 325-222 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H SAN ANGELO TX
2019-12-17 325-285 1XXX which blocks → TELNYX LLC 073H SAN ANGELO TX
2019-12-02 325-283 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H ABILENE TX
2019-10-07 325-710 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H SAN ANGELO TX
2019-09-30 325-274 0–9 XXXall 10 · 5 holders which blocks → TAYLOR TELEPHONE COOP, INC. DBA TAYLOR TELECOM 474J ABILENE TX
2019-09-20 325-758 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H BRONTE TX
2019-09-20 325-842 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H SWEETWATER TX
2019-09-17 325-900 0XXX9XXX which blocks → FRACTEL, LLC 965H MERKEL TX
2019-07-22 325-420 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C ROBERT LEE TX
2019-07-22 325-440 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C CARLSBAD TX
2019-07-22 325-550 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C EDEN TX
2019-07-22 325-666 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C WINTERS TX
2019-07-22 325-770 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C JUNCTION TX
2019-07-22 325-880 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C MENARD TX

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.