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
2011-11-15 512-730-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-11-08 512-642-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUTTO TX
2011-10-28 512-564-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAMPASAS TX
2011-10-28 512-571-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2011-10-27 512-362-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-10-27 512-527-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-10-27 512-730-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-10-14 512-265-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C BURNET TX
2011-10-14 512-277-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C BERTRAM TX
2011-10-14 512-359-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C LOCKHART TX
2011-10-14 512-379-6XXX 6000–6999Assigned ONVOY, LLC - TX 903C LEANDER TX
2011-10-14 512-412-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C BASTROP TX
2011-10-14 512-540-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C LAMPASAS TX
2011-10-14 512-829-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C DRIPPNGSPG TX
2011-10-14 512-842-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C WIMBERLEY TX
2011-10-14 512-931-3XXX 3000–3999Assigned ONVOY, LLC - TX 903C GEORGETOWN TX
2011-10-12 512-765-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2011-10-05 512-319-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-05 512-319-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2011-10-03 512-730-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J AUSTIN TX
2011-10-03 512-988-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2011-09-30 512-379-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LEANDER TX
2011-09-29 512-765-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-09-29 512-765-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-09-28 512-575-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SMITHVILLE TX
2011-09-20 512-277-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BERTRAM TX
2011-09-20 512-948-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GEORGETOWN TX
2011-09-13 512-765-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-09-13 512-765-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-09-13 512-765-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2011-09-01 512-362-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C AUSTIN TX
2011-09-01 512-843-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GEORGETOWN TX
2011-08-31 512-362-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-08-31 512-362-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2011-08-31 512-999-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2011-08-31 512-999-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2011-08-31 512-999-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2011-08-25 512-778-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 LIBERTY HL TX
2011-08-23 512-298-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-08-23 512-298-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-08-23 512-618-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN MARCOS TX
2011-08-23 512-815-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 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.