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
2016-05-19 346-352-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C HOUSTON TX
2016-05-19 346-718-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J HOUSTON TX
2016-05-17 346-814-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-05-17 346-814-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-05-17 346-814-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRING TX
2016-05-17 346-907-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-05-17 346-907-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HSTNSUBURB TX
2016-05-16 346-258-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C SHELDON TX
2016-05-16 346-258-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C SHELDON TX
2016-05-11 346-368-1XXX 1000–1999Assigned METROPCS, INC. 5562 SUGAR LAND TX
2016-05-11 346-368-9XXX 9000–9999Assigned METROPCS, INC. 5562 SUGAR LAND TX
2016-05-06 346-352-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-05-06 346-352-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HOUSTON TX
2016-05-06 346-907-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HSTNSUBURB TX
2016-05-04 346-236-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2016-04-29 346-352-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7239 HOUSTON TX
2016-04-29 346-808-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TOMBALL TX
2016-04-29 346-818-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2016-04-29 346-818-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CYPRESS TX
2016-04-28 346-347-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ALVIN TX
2016-04-27 346-233-8XXX 8000–8999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2016-04-27 346-233-9XXX 9000–9999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAYTOWN TX
2016-04-27 346-857-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2016-04-27 346-857-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 RICHMNRNBG TX
2016-04-20 346-262-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-262-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2016-04-20 346-617-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 DICKINSON TX
2016-04-19 346-238-0XXX 0000–0999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-19 346-238-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 HOUSTON TX
2016-04-15 346-831-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SPRING TX
2016-04-14 346-714-0XXX 0000–0999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-04-14 346-714-1XXX 1000–1999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-04-14 346-714-2XXX 2000–2999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-04-14 346-714-3XXX 3000–3999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-04-14 346-714-4XXX 4000–4999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2016-04-14 346-714-5XXX 5000–5999Assigned AERIAL COMMUNICATIONS, INC. 6701 BAMMEL 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.