NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

33 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 18
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
2018-07-19 346-762-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 RICHMNRNBG TX
2018-07-18 346-348-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HOUSTON TX
2018-07-18 346-348-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HOUSTON TX
2018-07-17 346-273-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2018-07-17 346-349-0XXX 0000–0999Assigned AERIAL COMMUNICATIONS, INC. 6701 CHANNELVW TX
2018-07-17 346-349-1XXX 1000–1999Assigned AERIAL COMMUNICATIONS, INC. 6701 CHANNELVW TX
2018-07-17 346-349-2XXX 2000–2999Assigned AERIAL COMMUNICATIONS, INC. 6701 CHANNELVW TX
2018-07-17 346-349-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 CHANNELVW TX
2018-07-17 346-349-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 CHANNELVW TX
2018-07-13 346-325-0XXX 0000–0999Assigned AERIAL COMMUNICATIONS, INC. 6701 SATSUMA TX
2018-07-13 346-341-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 STAFFORD TX
2018-07-13 346-341-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 STAFFORD TX
2018-07-13 346-414-5XXX 5000–5999Assigned AERIAL COMMUNICATIONS, INC. 6701 CLEVELAND TX
2018-07-13 346-414-6XXX 6000–6999Assigned AERIAL COMMUNICATIONS, INC. 6701 CLEVELAND TX
2018-07-06 346-306-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-07-06 346-306-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-07-02 346-348-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2018-07-02 346-348-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2018-07-02 346-348-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F HOUSTON TX
2018-06-29 346-261-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F PORTER TX
2018-06-29 346-342-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-06-29 346-342-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-06-29 346-342-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-06-29 346-342-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-06-29 346-342-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2018-06-28 346-345-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2018-06-28 346-345-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HUMBLE TX
2018-06-28 346-347-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F ALVIN TX
2018-06-28 346-347-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F ALVIN TX
2018-06-25 346-282-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHANNELVW TX
2018-06-21 346-341-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 STAFFORD TX
2018-06-18 346-325-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SATSUMA TX
2018-06-18 346-329-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAMMEL TX
2018-06-18 346-329-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAMMEL TX
2018-06-18 346-332-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2018-06-18 346-332-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2018-06-15 346-306-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-06-15 346-306-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-06-15 346-306-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-06-15 346-306-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 LANGHAMCRK TX
2018-06-13 346-335-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2018-06-08 346-328-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2018-06-08 346-328-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2018-05-31 346-257-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J KATY TX
2018-05-31 346-258-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F SHELDON TX
2018-05-30 346-341-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J STAFFORD TX
2018-05-30 346-342-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HSTNSUBURB TX
2018-05-18 346-343-0XXX 0000–0999Assigned WINDSTREAM SUGAR LAND, LLC 2147 SUGAR LAND TX
2018-05-18 346-343-1XXX 1000–1999Assigned WINDSTREAM SUGAR LAND, LLC 2147 SUGAR LAND TX
2018-05-18 346-343-2XXX 2000–2999Assigned WINDSTREAM SUGAR LAND, LLC 2147 SUGAR LAND 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.