NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

3 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2005-07-25 512-366-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-25 512-366-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-25 512-366-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-25 512-366-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-25 512-672-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-25 512-672-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-25 512-672-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-07-15 512-504-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K KYLE TX
2005-07-14 512-639-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2005-07-14 512-809-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-07-14 512-809-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-07-12 512-351-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K AUSTIN TX
2005-07-12 512-767-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2005-07-12 512-767-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2005-07-06 512-363-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-363-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-363-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-363-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-363-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-669-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-905-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-905-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-905-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-905-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-07-06 512-905-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-06-28 512-595-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 TAYLOR TX
2005-06-23 512-215-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2005-06-23 512-535-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-535-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2005-06-23 512-829-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K DRIPPNGSPG TX
2005-06-22 512-638-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2005-06-10 512-237-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SMITHVILLE TX
2005-06-10 512-357-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MARTINDALE TX
2005-06-10 512-377-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-06-10 512-782-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-06-10 512-782-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-06-10 512-782-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-06-10 512-782-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-06-10 512-879-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 AUSTIN TX
2005-06-09 512-878-6XXX 6000–6999Assigned GRANDE COMMUNICATIONS NETWORKS, INC. - TX 7670 SAN MARCOS TX
2005-06-08 512-466-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-06-08 512-466-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-06-08 512-466-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2005-06-08 512-466-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.