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
2010-05-05 512-368-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C AUSTIN TX
2010-05-05 512-540-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 LAMPASAS TX
2010-05-03 512-368-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-05-03 512-368-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-05-03 512-368-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-04-23 512-222-0XXX 0000–0999Assigned GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 AUSTIN TX
2010-04-23 512-222-1XXX 1000–1999Assigned GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 AUSTIN TX
2010-04-23 512-518-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2010-04-20 512-516-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-04-16 512-354-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-04-12 512-354-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-04-12 512-354-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-04-07 512-354-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-04-07 512-354-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-04-07 512-354-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-03-30 512-545-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2010-03-23 512-354-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-03-23 512-516-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-03-23 512-516-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-03-23 512-516-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-03-23 512-763-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2010-03-10 512-966-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GEORGETOWN TX
2010-03-04 512-309-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F TAYLOR TX
2010-02-24 512-522-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-522-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-24 512-618-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN MARCOS TX
2010-02-24 512-861-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-02-23 512-574-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-02-23 512-574-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-02-22 512-436-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-481-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-537-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-609-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-650-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-693-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-703-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-777-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-02-22 512-851-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2010-02-19 512-553-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BURNET TX
2010-02-19 512-588-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BURNET TX
2010-02-19 512-588-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F BURNET TX
2010-02-19 512-686-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F GEORGETOWN 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.