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
2007-10-12 512-652-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-10-11 512-539-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-10-11 512-539-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-10-11 512-539-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-10-09 512-364-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-10-09 512-364-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-10-09 512-364-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-10-08 512-367-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-10-08 512-592-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-10-08 512-592-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2007-10-08 512-592-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2007-10-08 512-592-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2007-10-08 512-592-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-10-03 512-273-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K MCDADE TX
2007-09-25 512-592-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-09-25 512-592-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-09-25 512-592-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-09-19 512-501-2XXX 2000–2999Assigned ONVOY, LLC - TX 903C AUSTIN TX
2007-09-13 512-366-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-09-12 512-553-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BURNET TX
2007-09-12 512-670-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2007-09-10 512-269-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TAYLOR TX
2007-09-10 512-523-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K BUDA TX
2007-09-10 512-523-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K BUDA TX
2007-09-07 512-364-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-09-07 512-364-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-08-30 512-276-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-356-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-358-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-383-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-432-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-436-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-465-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-467-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-30 512-505-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-28 512-371-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2007-08-28 512-394-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2007-08-28 512-394-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2007-08-27 512-418-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-08-27 512-492-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-08-27 512-492-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-08-24 512-373-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-24 512-428-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-24 512-428-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-24 512-428-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-24 512-502-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-24 512-527-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-24 512-579-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2007-08-23 512-373-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2007-08-23 512-373-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 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.