NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 210
NEW CINGULAR WIRELESS PCS, LLC - IL 1054
T-MOBILE USA, INC. 668
ONVOY, LLC - TX 395
BANDWIDTH.COM CLEC, LLC - TX 371
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 314
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
2004-12-22 210-838-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-12-22 210-838-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-12-22 210-838-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-12-15 210-855-0XXX 0000–0999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-1XXX 1000–1999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-2XXX 2000–2999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-3XXX 3000–3999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-4XXX 4000–4999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-7XXX 7000–7999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-8XXX 8000–8999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-15 210-855-9XXX 9000–9999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-12-14 210-277-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-12-14 210-296-0XXX 0000–0999Assigned METROPCS, INC. 5562 SANANTONIO TX
2004-12-14 210-302-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-12-14 210-323-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-12-07 210-265-8XXX 8000–8999Assigned ONVOY, LLC - TX 903C SANANTONIO TX
2004-12-06 210-764-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2004-12-06 210-775-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2004-12-06 210-775-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2004-12-03 210-764-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2004-11-18 210-568-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-11-18 210-568-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-11-18 210-579-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-11-15 210-447-6XXX 6000–6999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-11-08 210-437-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-08 210-538-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-08 210-595-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-08 210-595-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-08 210-595-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-08 210-595-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-08 210-595-8XXX 8000–8999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-11-05 210-447-5XXX 5000–5999Assigned LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 8434 SANANTONIO TX
2004-10-22 210-396-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-22 210-396-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-22 210-396-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-22 210-396-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-22 210-396-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-13 210-254-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-13 210-254-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-13 210-254-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-10-13 210-255-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-254-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-254-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-254-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-254-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-310-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-310-5XXX 5000–5999Assigned METROPCS, INC. 5562 SANANTONIO TX
2004-09-24 210-310-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANANTONIO 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.