NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

4 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 254
ONVOY, LLC - TX 4
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
2021-07-27 254-439 2XXX3XXX4XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - TX 903C THORNTON TX
2021-07-27 254-478 6XXX7XXX which blocks → ONVOY, LLC - TX 903C ZABCIKVL TX
2021-07-26 254-866 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H TROY TX
2021-07-21 254-476 4XXX6XXX7XXX which blocks → ONVOY, LLC - TX 903C HEIDENHEMR TX
2021-07-16 254-567 0XXX1XXX8XXX · 3 holders which blocks → FRACTEL, LLC 965H IREDELL TX
2021-07-13 254-468 0XXX2XXX8XXX · 2 holders which blocks → ONVOY, LLC - TX 903C HOLLAND TX
2021-07-13 254-473 3XXX4XXX which blocks → ONVOY, LLC - TX 903C MOFFAT TX
2021-07-13 254-474 4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - TX 903C OENAVILLE TX
2021-07-13 254-475 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C REAGAN TX
2021-07-06 254-448 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C BARTLETT TX
2021-07-06 254-467 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C EDDY TX
2021-06-22 254-464 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C MOODY TX
2021-05-25 254-438 0XXX1XXX2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CSC VOICE, LLC 612K FLORENCE TX
2021-05-10 254-667 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H CRANFILSGP TX
2021-05-10 254-674 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BELTON TX
2021-05-10 254-966 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BURLINGTON TX
2021-04-26 254-437 0XXX1XXX2XXX3XXX · 2 holders which blocks → TELNYX LLC 073H HILLSBORO TX
2021-03-18 254-429 0–9 XXXall 10 · 5 holders which blocks → STRATUS NETWORKS 495J WACO TX
2021-03-08 254-922 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KILLEEN TX
2021-01-27 254-509 0XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - TX 903C BREMOND TX
2021-01-27 254-810 0XXX1XXX2XXX8XXX · 3 holders which blocks → ONVOY, LLC - TX 903C JONESBORO TX
2021-01-21 254-852 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H CISCO TX
2021-01-15 254-451 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H CHINA SPG TX
2021-01-15 254-453 0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - TX 903C IRENE TX
2021-01-08 254-428 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - TX 903C EASTLAND TX
2021-01-04 254-427 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - TX 903C LAGUNA PK TX
2020-12-21 254-599 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H COPPERASCV TX
2020-12-08 254-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C WACO TX
2020-11-17 254-419 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KILLEEN TX
2020-11-12 254-952 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C KILLEEN TX
2020-11-04 254-418 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
2020-10-29 254-545 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C BRECKENRDG TX
2020-09-28 254-416 0–9 XXXall 10 · 4 holders which blocks → IP HORIZON LLC 515J WACO TX
2020-09-04 254-408 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 COPPERASCV TX
2020-08-28 254-362 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 478J WACO TX
2020-07-30 254-397 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
2020-07-09 254-588 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MERIDIAN TX
2020-06-22 254-544 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H SO BOSQUE TX
2020-06-11 254-391 0–9 XXXall 10 · 6 holders which blocks → CSC WIRELESS, LLC 425J WACO TX
2020-06-10 254-425 0XXX2XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - TX 903C POTTSVILLE TX
2020-06-10 254-524 0XXX2XXX4XXX5XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C FLAT TX
2020-05-14 254-465 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H LORENA TX
2020-05-14 254-766 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H WORTHAM TX
2020-05-14 254-788 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H LEROY TX
2020-05-14 254-877 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → FRACTEL, LLC 965H GHOLSON TX
2020-04-28 254-389 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
2020-03-31 254-373 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WACO TX
2020-02-20 254-504 9XXX which blocks → HD CARRIER LLC 321J WACO TX
2020-01-28 254-370 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 KILLEEN TX
2020-01-24 254-369 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN 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.