NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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. 38
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
— 254-359 not yet reported which blocks → ALENCO COMMUNICATIONS, INC. 2090 DONIE TX
— 254-364 6XXX which blocks → TEXAS WINDSTREAM, LLC 2153 IREDELL TX
— 254-368 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KILLEEN TX
— 254-371 none assigned yet which blocks → T-MOBILE USA, INC. 6529 COPPERASCV TX
— 254-372 6XXX which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 POTTSVILLE TX
— 254-375 6XXX7XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 KOSSE TX
— 254-377 not yet reported which blocks → GLOBALSTAR USA, INC. 3685 WACO TX
— 254-378 not yet reported which blocks → GLOBALSTAR USA, INC. 3685 WACO TX
— 254-379 9XXX which blocks → METROPCS, INC. 5562 WACO TX
— 254-381 not yet reported which blocks → GLOBALSTAR USA, INC. 3685 WACO TX
— 254-384 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F VALLEY ML TX
— 254-385 8XXX which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 THORNTON TX
— 254-386 none assigned yet which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 HAMILTON TX
— 254-388 not yet reported which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-392 6XXX7XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KILLEEN TX
— 254-394 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 KILLEEN TX
— 254-395 0XXX which blocks → WINDSTREAM SUGAR LAND, LLC 2147 TEHUACANA TX
— 254-396 7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLEN ROSE TX
— 254-398 not yet reported which blocks → TELETOUCH COMMUNICATIONS, INC. 6591 WACO TX
— 254-399 not yet reported which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-403 0XXX1XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DE LEON TX
— 254-404 none assigned yet which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 GATESVILLE TX
— 254-405 6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WACO TX
— 254-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 254-412 0XXX2XXX4XXX6XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-420 6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WACO TX
— 254-421 5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 TEMPLE TX
— 254-422 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 MARLIN TX
— 254-424 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 WACO TX
— 254-426 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MARLIN TX
— 254-435 0XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MERIDIAN TX
— 254-442 0XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 CISCO TX
— 254-445 5XXX which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 DUBLIN TX
— 254-447 2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 WACO TX
— 254-455 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - TX 903C CAMERON TX
— 254-456 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 OGLESBY TX
— 254-458 not yet reported which blocks → T-MOBILE USA, INC. 6529 KILLEEN TX
— 254-461 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H WACO TX
— 254-462 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 KILLEEN TX
— 254-463 not yet reported which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 JONESBORO TX
— 254-470 1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 OGLESBY TX
— 254-471 not yet reported which blocks → CENTRAL TEXAS TEL. COOP., INC. 2052 EVANT TX
— 254-472 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 MEXIA TX
— 254-482 4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CAMERON TX
— 254-486 not yet reported which blocks → VALOR TELECOMM TX, LD-TX #2 DBA WINDSTREAM COMM SW 1181 CRAWFORD TX
— 254-487 4XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF EASTERN TEXAS, INC. 2084 FLAT TX
— 254-492 1XXX3XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F WACO TX
— 254-494 9XXX which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 TURNERSVL TX
— 254-501 not yet reported which blocks → BRIGHTSPEED OF TEXAS, INC. 2114 KILLEEN TX
— 254-506 not yet reported which blocks → HELMSCO, INC. 6833 MEXIA TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.