NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 27
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Oct 2026 Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 469-375 1XXX8XXX · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DALLAS TX
— 469-376 not yet reported which blocks → ONE RING NETWORKS II, INC. D/B/A ONE RING NETWORKS 3726 KAUFMAN TX
— 469-377 0XXX1XXX6XXX · 3 holders which blocks → PEOPLES COMMUNICATION, INC. -TX 135H ROCKWALL TX
— 469-384 2XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FRISCO TX
— 469-385 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DALLAS TX
— 469-392 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MILFORD TX
— 469-396 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 MCKINNEY TX
— 469-398 2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 DALLAS TX
— 469-399 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K DALLAS TX
— 469-400 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MCKINNEY TX
— 469-402 not yet reported which blocks → ONVOY, LLC - TX 903C ROCKWALL TX
— 469-403 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
— 469-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 469-417 8XXX9XXX which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX
— 469-420 0XXX5XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-424 4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCKINNEY TX
— 469-426 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 IRVING TX
— 469-429 1XXX5XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - TX 903C PLANO TX
— 469-433 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 ROCKWALL TX
— 469-437 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 RED OAK TX
— 469-438 not yet reported which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
— 469-441 not yet reported which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
— 469-442 5XXX6XXX7XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 IRVING TX
— 469-445 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
— 469-446 none assigned yet which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
— 469-448 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 PROSPER TX
— 469-449 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GRANDPRARI TX
— 469-452 0XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCKINNEY TX
— 469-453 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
— 469-454 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CEDAR HILL TX
— 469-458 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
— 469-461 4XXX6XXX7XXX which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 DALLAS TX
— 469-464 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 LEWISVILLE TX
— 469-467 not yet reported which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 PLANO TX
— 469-471 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - TX 903C GRANDPRARI TX
— 469-472 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C IRVING TX
— 469-477 not yet reported which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-480 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F DALLAS TX
— 469-481 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C PROSPER TX
— 469-483 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 MIDLOTHIAN TX
— 469-484 4XXX6XXX7XXX8XXX · 2 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 DALLAS TX
— 469-487 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GRANDPRARI TX
— 469-499 3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 IRVING TX
— 469-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 469-517 not yet reported which blocks → ONVOY, LLC - TX 903C WAXAHACHIE TX
— 469-519 not yet reported which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ALLEN TX
— 469-521 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CARROLLTON TX
— 469-522 2XXX3XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 DALLAS TX
— 469-523 not yet reported which blocks → ONVOY, LLC - TX 903C CEDAR HILL TX
— 469-524 3XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL TELEPHONE COMPANY - TX 7726 IRVING TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.