NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
— 325-468 1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 MILES TX
— 325-469 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 EOLA TX
— 325-473 1XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRONTE TX
— 325-475 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 LONDON TX
— 325-481 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-482 4XXX7XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-483 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 DOOLEMLSVW TX
— 325-484 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WATER VLY TX
— 325-486 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 325-512 not yet reported which blocks → TX
— 325-513 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ABILENE TX
— 325-514 1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ABILENE TX
— 325-523 0XXX1XXX8XXX · 3 holders which blocks → TELNYX LLC 073H LORAINE TX
— 325-525 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TELNYX LLC 073H PAINT ROCK TX
— 325-529 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 POTOSI TX
— 325-530 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 SONORA TX
— 325-537 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 HAWLEY TX
— 325-548 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 HAMBY TX
— 325-554 8XXX which blocks → TAYLOR TEL. COOP., INC. 2151 TUSCOLA TX
— 325-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TX
— 325-572 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 BUFFALOGAP TX
— 325-573 not yet reported which blocks → SOUTHWESTERN BELL 9533 SNYDER TX
— 325-574 0XXX3XXX4XXX5XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 SNYDER TX
— 325-575 4XXX7XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SNYDER TX
— 325-576 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 HAMLIN TX
— 325-583 not yet reported which blocks → TAYLOR TEL. COOP., INC. 2151 LAWN TX
— 325-597 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRADY TX
— 325-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 325-617 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CSC VOICE, LLC 612K SAN ANGELO TX
— 325-622 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 CHEROKEE TX
— 325-623 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 LOCKER TX
— 325-624 not yet reported which blocks → COLEMAN COUNTY TEL. COOP., INC. 2057 BURKETT TX
— 325-625 0XXX6XXX7XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 COLEMAN TX
— 325-627 3XXX4XXX5XXX6XXX8XXX which blocks → SOUTHWESTERN BELL 9533 ABILENE TX
— 325-628 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 BEND TX
— 325-632 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 MERTZON TX
— 325-636 none assigned yet which blocks → COLEMAN COUNTY TEL. COOP., INC. 2057 VALERA TX
— 325-641 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BROWNWOOD TX
— 325-642 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNWOOD TX
— 325-643 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BROWNWOOD TX
— 325-644 0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WESTBROOK TX
— 325-646 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BROWNWOOD TX
— 325-647 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BROWNWOOD TX
— 325-648 0XXX1XXX5XXX8XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 GOLDTHWAIT TX
— 325-649 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BROWNWOOD TX
— 325-650 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN ANGELO TX
— 325-651 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-653 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX
— 325-654 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SAN ANGELO TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.