NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

3 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 512
HD CARRIER LLC 2
INTRADO COMMUNICATIONS, 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
2005-09-21 512-718-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2005-09-16 512-394-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-09-16 512-608-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-09-16 512-608-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-09-16 512-638-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-09-16 512-878-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN MARCOS TX
2005-09-13 512-227-7XXX 7000–7999Assigned METROPCS, INC. 5562 LOCKHART TX
2005-09-12 512-308-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2005-09-08 512-378-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-09-02 512-355-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BERTRAM TX
2005-09-02 512-607-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DRIPPNGSPG TX
2005-09-02 512-722-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WIMBERLEY TX
2005-08-31 512-241-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-31 512-968-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-08-29 512-450-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2005-08-29 512-450-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2005-08-11 512-215-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-243-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-330-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-344-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-358-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-358-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-382-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-394-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-11 512-394-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-08-10 512-638-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-08-10 512-718-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BASTROP TX
2005-08-10 512-878-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN MARCOS TX
2005-08-09 512-763-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 GEORGETOWN TX
2005-08-05 512-686-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GEORGETOWN TX
2005-08-04 512-788-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-08-04 512-788-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-08-01 512-276-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-206-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-207-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-226-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-264-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-264-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-363-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-363-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-366-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-27 512-366-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.