NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

23 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 737
ONVOY, LLC - TX 14
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 4
NEW CINGULAR WIRELESS PCS, LLC - IL 2
EXIANT COMMUNICATIONS LLC 1
BANDWIDTH.COM CLEC, LLC - TX 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
2017-12-11 737-229-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-11 737-229-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-12-08 737-216-7XXX 7000–7999Assigned PEERLESS NETWORK OF TEXAS, LLC - TX 177F TAYLOR TX
2017-11-21 737-224-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-11-21 737-224-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-11-21 737-224-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-11-21 737-224-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-11-21 737-224-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-11-21 737-224-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2017-11-21 737-224-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2017-11-13 737-414-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BUDA TX
2017-11-13 737-414-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BUDA TX
2017-11-13 737-414-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BUDA TX
2017-11-13 737-615-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-11-13 737-615-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-11-13 737-615-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-10-31 737-615-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2017-10-30 737-224-6XXX 6000–6999Assigned AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2017-10-30 737-224-7XXX 7000–7999Assigned AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2017-10-30 737-224-8XXX 8000–8999Assigned AUSTIN BESTLINE COMPANY 7551 AUSTIN TX
2017-10-25 737-228-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-10-25 737-228-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-10-25 737-228-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2017-10-20 737-240-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GEORGETOWN TX
2017-10-20 737-757-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LEANDER TX
2017-10-10 737-206-5XXX 5000–5999Assigned ONVOY, LLC - TX 903C BASTROP TX
2017-10-03 737-240-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2017-09-28 737-228-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2017-09-20 737-228-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-09-20 737-228-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-09-20 737-228-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-09-20 737-228-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2017-09-19 737-227-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WIMBERLEY TX
2017-08-31 737-212-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-218-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2017-08-31 737-218-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-220-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-220-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-241-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-241-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-443-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2017-08-31 737-747-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BURNET TX
2017-08-29 737-221-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN MARCOS 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.