NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 281
SOUTHWESTERN BELL 283
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 66
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 57
NEW CINGULAR WIRELESS PCS, LLC - IL 50
WINDSTREAM SUGAR LAND, LLC 38
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
2026-02-06 281-625 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2025-12-03 281-722 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2024-11-20 281-473 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HSTNSUBURB TX
2023-09-28 281-270 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C BARKER TX
2023-01-06 281-281 0–9 XXXall 10 · 2 holders which blocks → USFON, INC. - TX 473F HSTNSUBURB TX
2022-04-28 281-805 0–9 XXXwhole prefix which blocks → ONVOY, LLC - TX 903C HSTNSUBURB TX
2022-03-03 281-790 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 SPRING TX
2021-01-04 281-699 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C CROSBY TX
2020-12-22 281-697 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C SUGAR LAND TX
2020-12-18 281-696 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2020-10-02 281-868 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BAYTOWN TX
2020-07-06 281-626 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C ROSHARON TX
2019-04-30 281-729 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J DICKINSON TX
2019-02-08 281-505 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 KATY TX
2019-01-10 281-562 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 BAMMEL TX
2017-11-02 281-623 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2017-10-17 281-939 0–9 XXXall 10 · 5 holders which blocks → SOUTHWESTERN BELL 9533 SPRING TX
2017-05-01 281-365 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2015-08-11 281-612 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J FRIENDSWD TX
2014-06-09 281-771 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C SPRING TX
2014-02-26 281-967 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2014-02-17 281-906 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2013-06-18 281-662 0–9 XXXwhole prefix which blocks → METROPCS, INC. 5562 CHANNELVW TX
2013-05-23 281-223 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J CLEVELAND TX
2012-10-02 281-512 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HSTNSUBURB TX
2012-09-11 281-665 0–9 XXXall 10 · 4 holders which blocks → CONSOLIDATED COMMUNICATIONS OF TEXAS COMPANY 2109 KATY TX
2012-08-21 281-624 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J BAMMEL TX
2011-07-29 281-908 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-07-29 281-928 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-07-05 281-254 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-05-13 281-407 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2010-04-22 281-887 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 SATSUMA TX
2009-03-18 281-737 0–9 XXXwhole prefix which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 SATSUMA TX
2008-03-26 281-475 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2007-11-27 281-832 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2007-10-16 281-979 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2007-09-05 281-713 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2007-09-04 281-409 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2007-09-04 281-900 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2007-08-03 281-896 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 HSTNSUBURB TX
2007-07-10 281-714 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2007-06-26 281-995 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HOUSTON TX
2007-06-22 281-865 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HOUSTON TX
2007-06-07 281-888 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2007-05-04 281-889 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2007-04-10 281-918 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J BEACH CITY TX
2007-04-02 281-917 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BAYTOWN TX
2007-01-25 281-904 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2006-12-18 281-806 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND TX
2006-11-21 281-501 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HOUSTON 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.