NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

3 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 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
2011-03-21 512-400-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BUDA TX
2011-03-21 512-400-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BUDA TX
2011-03-21 512-666-6XXX 6000–6999Assigned EVOLVE CELLULAR, INC. 139F AUSTIN TX
2011-03-21 512-994-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-03-21 512-994-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-03-21 512-994-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-03-21 512-994-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-03-14 512-489-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BRIGGS TX
2011-03-11 512-999-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2011-03-11 512-999-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2011-03-09 512-986-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LEANDER TX
2011-03-01 512-520-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-03-01 512-520-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-03-01 512-582-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-03-01 512-582-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-03-01 512-582-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-02-26 512-900-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2011-02-26 512-900-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2011-02-23 512-591-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F GEORGETOWN TX
2011-02-18 512-614-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J AUSTIN TX
2011-02-17 512-337-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LEANDER TX
2011-02-16 512-582-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2011-02-16 512-582-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-02-16 512-582-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-02-16 512-582-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-02-08 512-900-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2011-01-28 512-402-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2011-01-27 512-200-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-200-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-200-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-222-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-337-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F LEANDER TX
2011-01-27 512-400-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BUDA TX
2011-01-27 512-402-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-402-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-01-27 512-508-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F GEORGETOWN TX
2011-01-26 512-638-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2011-01-26 512-763-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2011-01-26 512-985-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BASTROP TX
2011-01-25 512-667-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2011-01-18 512-994-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-01-14 512-520-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-01-14 512-520-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-01-14 512-520-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN 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.