NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

36 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 346
ONVOY, LLC - TX 21
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 9
PAETEC ITEL, LLC 2
BANDWIDTH.COM CLEC, LLC - TX 2
TELNYX LLC 1
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-09-07 346-241-9XXX 9000–9999Assigned ONVOY, LLC - TX 903C HOUSTON TX
2016-09-02 346-236-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2016-09-02 346-236-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2016-09-01 346-237-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-09-01 346-237-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-09-01 346-237-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-09-01 346-241-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-09-01 346-816-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARCOLA TX
2016-08-30 346-215-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C ALVIN TX
2016-08-30 346-236-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C TOMBALL TX
2016-08-30 346-336-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TOMBALL TX
2016-08-29 346-220-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-08-29 346-831-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-08-29 346-831-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-08-25 346-762-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 RICHMNRNBG TX
2016-08-24 346-233-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BAYTOWN TX
2016-08-24 346-801-4XXX 4000–4999Assigned METROPCS, INC. 5562 BEACH CITY TX
2016-08-22 346-412-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2016-08-22 346-412-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2016-08-22 346-978-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANGHAMCRK TX
2016-08-22 346-978-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANGHAMCRK TX
2016-08-17 346-241-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2016-08-17 346-241-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2016-08-17 346-708-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F LANGHAMCRK TX
2016-08-17 346-708-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F LANGHAMCRK TX
2016-08-17 346-708-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F LANGHAMCRK TX
2016-08-15 346-320-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-08-15 346-320-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-08-15 346-320-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-08-09 346-773-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HSTNSUBURB TX
2016-07-28 346-773-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-07-27 346-707-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F VLY LODGE TX
2016-07-22 346-222-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F LA PORTE TX
2016-07-22 346-229-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-07-22 346-229-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-07-22 346-260-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F SATSUMA TX
2016-07-22 346-260-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F SATSUMA TX
2016-07-22 346-410-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-07-22 346-410-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-07-22 346-760-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BARKER TX
2016-07-22 346-760-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BARKER TX
2016-07-22 346-843-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F RICHMNRNBG TX
2016-07-21 346-368-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SUGAR LAND TX
2016-07-21 346-831-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2016-07-21 346-978-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2016-07-19 346-236-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F TOMBALL TX
2016-07-19 346-301-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F SPLENDORA TX
2016-07-19 346-323-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F HUMBLE TX
2016-07-19 346-352-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2016-07-19 346-352-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.