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 903
SOUTHWESTERN BELL 130
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 96
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 89
NEW CINGULAR WIRELESS PCS, LLC - IL 70
LEVEL 3 COMMUNICATIONS, LLC - TX 64
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
— 903-459 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 MILLER GRV TX
— 903-461 0XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 GREENVILLE TX
— 903-462 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 DENISON TX
— 903-463 not yet reported which blocks → SOUTHWESTERN BELL 9533 DENISON TX
— 903-464 1XXX2XXX3XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DENISON TX
— 903-465 not yet reported which blocks → SOUTHWESTERN BELL 9533 DENISON TX
— 903-466 0XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MT VERNON TX
— 903-467 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORSICANA TX
— 903-468 1XXX2XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 COMMERCE TX
— 903-469 not yet reported which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 MURCHISON TX
— 903-470 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C LONGVIEW TX
— 903-472 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL TX
— 903-473 9XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 EMORY TX
— 903-474 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 EMORY TX
— 903-475 1XXX2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 LONGVIEW TX
— 903-476 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 DORCHESTER TX
— 903-477 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ATHENS TX
— 903-478 7XXX which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 SLOCUM TX
— 903-479 not yet reported which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 MARTINS ML TX
— 903-482 3XXX4XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 VANALSTYNE TX
— 903-483 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F KILGORE TX
— 903-484 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BENWHEELER TX
— 903-485 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 SHIRLEY TX
— 903-486 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BONHAM TX
— 903-487 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHERMAN TX
— 903-488 1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 COMO TX
— 903-489 5XXX7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 MALAKOFF TX
— 903-493 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 CORSICANA TX
— 903-496 0XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 WOLFE CITY TX
— 903-497 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 MINEOLA TX
— 903-498 not yet reported which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 KEMP TX
— 903-499 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 CAYUGA TX
— 903-507 not yet reported which blocks → SOUTHWESTERN BELL 9533 TYLER TX
— 903-508 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 TYLER TX
— 903-509 not yet reported which blocks → SOUTHWESTERN BELL 9533 TYLER TX
— 903-510 not yet reported which blocks → SOUTHWESTERN BELL 9533 TYLER TX
— 903-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 903-520 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TYLER TX
— 903-521 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TYLER TX
— 903-522 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILGORE TX
— 903-523 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 GORDONVL TX
— 903-524 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WINFIELD TX
— 903-525 6XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 TYLER TX
— 903-526 9XXX which blocks → SOUTHWESTERN BELL 9533 TYLER TX
— 903-527 6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 CADDOMILLS TX
— 903-528 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 TYLER TX
— 903-529 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 MARQUEZ TX
— 903-530 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TYLER TX
— 903-531 not yet reported which blocks → SOUTHWESTERN BELL 9533 TYLER TX
— 903-532 0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 HOWE 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.