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
2004-10-15 512-607-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 DRIPPNGSPG TX
2004-10-15 512-772-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BASTROP TX
2004-10-14 512-227-5XXX 5000–5999Assigned METROPCS, INC. 5562 LOCKHART TX
2004-10-14 512-262-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KYLE TX
2004-10-14 512-312-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BUDA TX
2004-10-14 512-690-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LEANDER TX
2004-10-14 512-718-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2004-10-13 512-402-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-09-17 512-623-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2004-09-15 512-809-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2004-09-08 512-586-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-09-08 512-586-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-09-08 512-586-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-09-08 512-586-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-09-08 512-586-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-09-07 512-233-8XXX 8000–8999Assigned METROPCS, INC. 5562 AUSTIN TX
2004-08-11 512-377-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2004-08-11 512-402-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2004-08-11 512-809-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2004-08-10 512-291-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-08-10 512-291-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-08-10 512-291-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-08-10 512-351-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-08-10 512-382-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-08-10 512-382-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-07-30 512-351-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2004-07-26 512-215-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-07-26 512-215-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-07-26 512-215-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2004-07-22 512-809-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2004-07-16 512-351-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-07-16 512-351-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-07-16 512-351-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-07-16 512-351-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-07-13 512-215-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-215-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-215-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-215-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-215-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-697-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-697-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-697-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-13 512-697-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2004-07-09 512-276-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2004-07-07 512-772-0XXX 0000–0999Assigned AUSTIN BESTLINE COMPANY 7551 BASTROP TX
2004-06-18 512-489-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BRIGGS TX
2004-06-16 512-417-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2004-06-14 512-262-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K KYLE TX
2004-06-10 512-299-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2004-06-10 512-299-6XXX 6000–6999Assigned 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.