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 213
T-MOBILE USA, INC. 1276
ONVOY, LLC - CA 827
BANDWIDTH.COM CLEC, LLC - CA 547
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 389
NEW CINGULAR WIRELESS PCS, LLC 335
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
2015-11-24 213-863-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 07 CA
2015-11-23 213-279-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 01 CA
2015-11-23 213-279-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 01 CA
2015-11-23 213-279-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LSAN DA 01 CA
2015-11-16 213-279-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-11-16 213-421-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-11-16 213-421-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-11-16 213-421-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-11-16 213-421-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-11-16 213-421-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-11-12 213-336-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 10 CA
2015-10-28 213-336-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 10 CA
2015-10-21 213-231-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-231-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 01 CA
2015-10-21 213-372-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 01 CA
2015-10-15 213-279-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LSAN DA 01 CA
2015-10-05 213-372-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 01 CA
2015-10-05 213-372-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 01 CA
2015-09-28 213-372-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2015-09-22 213-269-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2015-09-22 213-269-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2015-09-22 213-269-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2015-09-22 213-335-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2015-09-22 213-335-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 01 CA
2015-09-17 213-269-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 01 CA
2015-09-08 213-204-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-275-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-275-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-275-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-275-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-800-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-800-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-08 213-814-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 07 CA
2015-09-04 213-264-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2015-09-04 213-264-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA

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.