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
2007-01-24 512-287-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-01-24 512-287-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-01-24 512-287-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-01-24 512-287-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-01-24 512-287-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2007-01-16 512-745-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2007-01-15 512-287-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2007-01-15 512-287-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2007-01-15 512-749-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SAN MARCOS TX
2006-12-27 512-313-0XXX 0000–0999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-27 512-313-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-22 512-234-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K BURNET TX
2006-12-22 512-355-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K BERTRAM TX
2006-12-11 512-852-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-11 512-904-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-11 512-904-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-11 512-906-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-12-07 512-629-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BASTROP TX
2006-11-30 512-942-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 GEORGETOWN TX
2006-11-21 512-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-11-17 512-430-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ROCKDALE TX
2006-11-17 512-639-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GEORGETOWN TX
2006-11-16 512-904-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-11-16 512-904-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-11-16 512-904-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-11-16 512-904-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-11-14 512-709-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-11-14 512-709-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-11-14 512-709-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUSTIN TX
2006-11-13 512-229-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C ELGIN TX
2006-11-13 512-668-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C LOCKHART TX
2006-11-07 512-216-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SAN MARCOS TX
2006-11-01 512-904-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7516 AUSTIN TX
2006-11-01 512-985-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K BASTROP TX
2006-10-30 512-995-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOCKHART TX
2006-10-26 512-745-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2006-10-26 512-745-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2006-10-20 512-852-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-10-20 512-852-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-10-20 512-852-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 7249 AUSTIN TX
2006-10-19 512-749-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS TX
2006-10-19 512-749-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN MARCOS 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.