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
2010-10-25 512-384-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-384-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-384-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-384-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-384-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-384-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-518-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-518-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-518-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-534-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-534-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-25 512-534-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2010-10-22 512-277-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BERTRAM TX
2010-10-20 512-564-4XXX 4000–4999Assigned ONVOY, LLC - TX 903C LAMPASAS TX
2010-10-19 512-543-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C ROCKDALE TX
2010-10-19 512-578-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-10-19 512-578-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-10-19 512-578-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-10-19 512-578-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2010-10-19 512-591-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 GEORGETOWN TX
2010-10-07 512-212-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MARTINDALE TX
2010-10-07 512-355-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BERTRAM TX
2010-10-07 512-843-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GEORGETOWN TX
2010-10-05 512-746-6XXX 6000–6999Assigned CSC VOICE, LLC 612K JARRELL TX
2010-10-01 512-333-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-10-01 512-333-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-10-01 512-333-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-30 512-607-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F DRIPPNGSPG TX
2010-09-29 512-549-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C BASTROP TX
2010-09-29 512-690-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C LEANDER TX
2010-09-29 512-955-7XXX 7000–7999Assigned ONVOY, LLC - TX 903C TAYLOR TX
2010-09-28 512-229-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K ELGIN TX
2010-09-28 512-262-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K KYLE TX
2010-09-28 512-295-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K BUDA TX
2010-09-28 512-528-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LEANDER TX
2010-09-28 512-588-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K BURNET TX
2010-09-28 512-595-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K TAYLOR TX
2010-09-28 512-642-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K HUTTO TX
2010-09-28 512-667-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K SAN MARCOS TX
2010-09-28 512-798-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K SMITHVILLE TX
2010-09-28 512-842-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K WIMBERLEY TX
2010-09-28 512-843-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K GEORGETOWN TX
2010-09-28 512-894-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K DRIPPNGSPG TX
2010-09-27 512-359-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K LOCKHART TX
2010-09-27 512-548-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LIBERTY HL TX
2010-09-27 512-549-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K BASTROP TX
2010-09-24 512-333-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - TX 004F AUSTIN TX
2010-09-24 512-534-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-09-24 512-534-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2010-09-24 512-534-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 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.