NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 903
SOUTHWESTERN BELL 130
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 96
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 89
NEW CINGULAR WIRELESS PCS, LLC - IL 70
LEVEL 3 COMMUNICATIONS, LLC - TX 64
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
2013-11-05 903-706 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K PARIS TX
2013-11-05 903-904 0–9 XXXall 10 · 5 holders which blocks → CSC VOICE, LLC 612K ATHENS TX
2013-11-04 903-398 0–9 XXXall 10 · 2 holders which blocks → PEOPLES COMMUNICATION, INC. -TX 135H HONEYGROVE TX
2013-10-31 903-554 0–9 XXXwhole prefix which blocks → PEOPLES COMMUNICATION, INC. -TX 135H GREENVILLE TX
2013-10-31 903-760 0–9 XXXwhole prefix which blocks → PEOPLES COMMUNICATION, INC. -TX 135H QUITMAN TX
2013-09-26 903-369 0–9 XXXwhole prefix which blocks → PEOPLES COMMUNICATION, INC. -TX 135H MINEOLA TX
2013-05-07 903-703 0XXX3XXX7XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLOSSOM TX
2013-04-26 903-688 not yet reported which blocks → AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX 0132 FROST TX
2013-04-04 903-502 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F CANTON TX
2013-04-04 903-518 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F BELLSSAVOY TX
2013-04-04 903-913 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F GRANDSALIN TX
2013-04-01 903-609 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARIS TX
2013-02-11 903-417 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW BOSTON TX
2012-09-27 903-414 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOWE TX
2012-09-27 903-419 0–9 XXXall 10 · 8 holders which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F POTTSBORO TX
2012-06-14 903-412 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SHIRLEY TX
2012-02-13 903-902 not yet reported which blocks → ETEX COMMUNCATIONS, LLC DBA ETEX TELECOM - TX 3196 GLADEWATER TX
2012-01-23 903-308 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F EMORY TX
2011-10-24 903-307 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SULPHURSPG TX
2011-10-17 903-202 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C WHITEHOUSE TX
2011-10-10 903-304 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BONHAM TX
2011-04-05 903-471 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL TX
2011-03-18 903-607 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 TYLER TX
2011-03-17 903-606 0–9 XXXwhole prefix which blocks → SOUTHWESTERN BELL 9533 TYLER TX
2011-03-01 903-600 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F RICE TX
2011-02-22 903-500 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → ONVOY, LLC - TX 903C LONGVIEW TX
2010-10-15 903-716 0–9 XXXall 10 · 5 holders which blocks → VALOR TELECOMM TX, LP-TX #1 DBA WINDSTREAM COMM SW 1163 TEXARKANA TX
2010-07-19 903-380 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MTPLEASANT TX
2010-05-14 903-910 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MABANK TX
2010-05-11 903-787 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TYLER TX
2010-01-20 903-402 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GILMER TX
2010-01-19 903-804 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ATHENS TX
2010-01-12 903-401 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PARIS TX
2010-01-12 903-999 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 6 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D MARTINS ML TX
2009-11-30 903-702 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MARSHALL TX
2009-10-22 903-204 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 MTPLEASANT TX
2009-10-16 903-410 not yet reported which blocks → COMCAST PHONE OF TEXAS, LLC - TX 8625 ELYSINFLDS TX
2009-10-16 903-937 not yet reported which blocks → COMCAST PHONE OF TEXAS, LLC - TX 8625 DE BERRY TX
2009-10-02 903-909 0XXX9XXX · 2 holders which blocks → COMCAST PHONE OF TEXAS, LLC - TX 8625 WASKOM TX
2009-08-18 903-336 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 TEXARKANA TX
2009-06-01 903-495 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PARIS TX
2009-04-16 903-708 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 PITTSBURG TX
2009-04-13 903-946 0–9 XXXall 10 · 4 holders which blocks → SOUTHWESTERN BELL 9533 PITTSBURG TX
2009-03-27 903-506 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 TEXARKANA TX
2009-03-10 903-805 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TYLER TX
2009-02-04 903-617 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TYLER TX
2008-12-16 903-740 0XXX1XXX which blocks → ONVOY, LLC - TX 903C LONGVIEW TX
2008-11-21 903-371 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F LONGVIEW TX
2008-09-29 903-906 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 WEAVER TX
2008-09-25 903-514 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 GUNTER TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.