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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2010-09-23 512-360-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F SMITHVILLE TX
2010-09-23 512-588-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BURNET TX
2010-09-22 512-614-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2010-09-16 512-518-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-16 512-518-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-16 512-518-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-16 512-518-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-10 512-518-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C AUSTIN TX
2010-09-09 512-518-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-08 512-550-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-09-08 512-550-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-09-08 512-550-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-09-08 512-550-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-08-30 512-582-1XXX 1000–1999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2010-08-30 512-758-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-08-30 512-758-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-08-30 512-777-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-08-27 512-400-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 BUDA TX
2010-08-26 512-534-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-08-26 512-534-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-08-23 512-948-7XXX 7000–7999Assigned CSC VOICE, LLC 612K GEORGETOWN TX
2010-08-18 512-999-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2010-08-18 512-999-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BASTROP TX
2010-08-17 512-861-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J AUSTIN TX
2010-08-10 512-861-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-08-10 512-861-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-08-06 512-861-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-08-05 512-489-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BRIGGS TX
2010-08-05 512-607-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F DRIPPNGSPG TX
2010-08-05 512-842-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F WIMBERLEY TX
2010-08-05 512-861-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-08-04 512-578-0XXX 0000–0999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2010-08-04 512-578-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2010-08-04 512-578-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2010-08-04 512-578-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2010-08-04 512-578-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2010-08-04 512-578-7XXX 7000–7999Assigned SOUTHWESTERN BELL 9533 AUSTIN TX
2010-08-03 512-948-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GEORGETOWN TX
2010-07-29 512-861-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C AUSTIN TX
2010-07-27 512-566-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LAMPASAS TX
2010-07-27 512-955-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2010-07-27 512-955-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2010-07-26 512-516-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2010-07-26 512-943-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F GEORGETOWN TX
2010-07-20 512-534-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-07-20 512-534-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-07-16 512-550-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-07-16 512-550-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-07-16 512-550-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-07-16 512-550-9XXX 9000–9999Assigned 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.