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
2004-09-24 210-310-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-310-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-334-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-334-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-334-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-334-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-24 210-334-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-09-17 210-516-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-09-13 210-515-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-09-13 210-515-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-09-13 210-515-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-09-07 210-237-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-237-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-246-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-248-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-249-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-259-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-259-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-259-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-259-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-259-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-259-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-09-07 210-265-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2004-08-30 210-237-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-30 210-237-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-30 210-237-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-30 210-237-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-30 210-237-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-30 210-237-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-27 210-579-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-08-27 210-587-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-08-27 210-587-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-08-27 210-587-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SANANTONIO TX
2004-08-18 210-375-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-375-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-375-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-375-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-437-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-437-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-437-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-437-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-18 210-538-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SANANTONIO TX
2004-08-17 210-764-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANANTONIO TX
2004-08-13 210-204-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-13 210-204-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-13 210-204-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-13 210-204-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-08-13 210-204-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-07-28 210-204-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SANANTONIO TX
2004-07-28 210-204-2XXX 2000–2999Assigned 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.