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
2016-01-28 346-616-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HUMBLE TX
2016-01-26 346-310-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HOUSTON TX
2016-01-19 346-321-0XXX 0000–0999Assigned METROPCS, INC. 5562 CHANNELVW TX
2016-01-19 346-321-1XXX 1000–1999Assigned METROPCS, INC. 5562 CHANNELVW TX
2016-01-19 346-321-2XXX 2000–2999Assigned METROPCS, INC. 5562 CHANNELVW TX
2016-01-18 346-717-0XXX 0000–0999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-1XXX 1000–1999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-2XXX 2000–2999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-5XXX 5000–5999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-6XXX 6000–6999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-7XXX 7000–7999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-18 346-717-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-14 346-309-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SUGAR LAND TX
2016-01-14 346-319-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2016-01-14 346-701-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HOUSTON TX
2016-01-13 346-770-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-13 346-770-5XXX 5000–5999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-13 346-770-6XXX 6000–6999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-13 346-770-7XXX 7000–7999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-13 346-770-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-13 346-770-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-01-12 346-310-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-01-07 346-215-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 ALVIN TX
2016-01-07 346-215-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 ALVIN TX
2016-01-07 346-215-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 ALVIN TX
2016-01-07 346-319-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-01-07 346-319-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-01-06 346-402-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CLEVELAND TX
2016-01-06 346-818-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 CYPRESS TX
2016-01-06 346-831-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2016-01-06 346-831-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2016-01-05 346-252-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HSTNSUBURB TX
2016-01-05 346-252-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 HSTNSUBURB TX
2015-12-31 346-999-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C HUFFMAN TX
2015-12-29 346-251-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BARKER TX
2015-12-29 346-307-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KATY TX
2015-12-29 346-307-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 KATY TX
2015-12-29 346-321-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHANNELVW TX
2015-12-29 346-321-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHANNELVW TX
2015-12-29 346-321-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHANNELVW TX
2015-12-29 346-321-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHANNELVW TX
2015-12-29 346-402-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLEVELAND TX
2015-12-29 346-815-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 APOLLO TX
2015-12-28 346-260-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SATSUMA TX
2015-12-28 346-260-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SATSUMA TX
2015-12-28 346-260-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SATSUMA TX
2015-12-23 346-220-0XXX 0000–0999Assigned ONVOY, LLC - TX 903C SPRING 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.