NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 830-424 8XXX which blocks → GUADALUPE VALLEY TEL. COOP., INC. 2083 LEESVILLE TX
— 830-426 0XXX which blocks → SOUTHWESTERN BELL 9533 HONDO TX
— 830-427 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 MARION TX
— 830-429 0XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SOMERSET TX
— 830-433 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SEGUIN TX
— 830-437 3XXX which blocks → GUADALUPE VALLEY TEL. COOP., INC. 2083 COST TX
— 830-438 not yet reported which blocks → GUADALUPE VALLEY TEL. COOP., INC. 2083 BULVERDE TX
— 830-452 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TELNYX LLC 073H CHRISTINE TX
— 830-456 none assigned yet which blocks → METROPCS, INC. 5562 FREDECKSBG TX
— 830-457 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 BIG WELLS TX
— 830-459 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KERRVILLE TX
— 830-460 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 BANDERA TX
— 830-466 not yet reported which blocks → VALLEY TEL. COOP., INC. 2159 SAN MIGUEL TX
— 830-468 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ASHERTON TX
— 830-469 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 DEL RIO TX
— 830-476 2XXX3XXX5XXX7XXX8XXX · 4 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 MEDINALAKE TX
— 830-480 0XXX1XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLEASANTON TX
— 830-481 1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 NEWBRANFLS TX
— 830-484 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 2154 POTH TX
— 830-494 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 LULING TX
— 830-500 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C NEWBRANFLS TX
— 830-505 1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PEARSALL TX
— 830-510 0XXX1XXX2XXX3XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 PIPE CREEK TX
— 830-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 830-513 3XXX4XXX5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EAGLE PASS TX
— 830-514 2XXX which blocks → ONVOY, LLC - TX 903C KENEDY TX
— 830-515 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NEWBRANFLS TX
— 830-521 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 CASTROVL TX
— 830-529 1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 PIPE CREEK TX
— 830-532 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 CAMPBELLTN TX
— 830-534 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GILLETT TX
— 830-535 2XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 PIPE CREEK TX
— 830-537 not yet reported which blocks → GUADALUPE VALLEY TEL. COOP., INC. 2083 SABINA TX
— 830-538 0XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CASTROVL TX
— 830-540 1XXX5XXX which blocks → GUADALUPE VALLEY TEL. COOP., INC. 2083 SATURN TX
— 830-541 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DEVINE TX
— 830-542 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FLORESVL TX
— 830-547 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 SEGUIN TX
— 830-549 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SEGUIN TX
— 830-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TX
— 830-557 0XXX2XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-560 0XXX2XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 SEGUIN TX
— 830-562 not yet reported which blocks → HILL COUNTRY TEL. COOP., INC. 2086 TARPLEY TX
— 830-563 0XXX4XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 BRACKETTVL TX
— 830-569 none assigned yet which blocks → SOUTHWESTERN BELL 9533 PLEASANTON TX
— 830-570 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLEASANTON TX
— 830-579 3XXX6XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 CAMPBELLTN TX
— 830-580 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F JOURDANTON TX
— 830-581 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LAVERNIA TX
— 830-582 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 NIXON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.