NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 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 323
ONVOY, LLC - CA 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
2005-12-01 323-540-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-12-01 323-540-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-12-01 323-552-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2005-11-30 323-420-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2005-11-30 323-482-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2005-11-23 323-472-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2005-11-22 323-472-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2005-11-21 323-770-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2005-11-18 323-482-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTEBELLO CA
2005-11-18 323-776-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2005-11-18 323-776-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2005-11-15 323-203-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2005-11-15 323-203-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2005-11-10 323-637-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2005-11-10 323-637-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2005-11-10 323-637-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2005-11-10 323-637-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2005-11-08 323-404-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-11-08 323-404-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-11-03 323-373-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 11 CA
2005-11-01 323-776-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LSAN DA 09 CA
2005-10-28 323-877-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2005-10-28 323-877-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2005-10-20 323-482-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-10-20 323-482-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-10-20 323-482-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-10-20 323-482-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-10-12 323-482-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2005-10-12 323-482-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2005-10-12 323-482-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2005-10-11 323-540-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-10-11 323-540-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-10-11 323-767-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2005-10-07 323-552-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2005-10-06 323-312-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-10-06 323-312-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-10-06 323-312-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-10-06 323-775-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-10-06 323-775-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-10-04 323-863-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2005-09-23 323-342-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-09-06 323-352-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-09-06 323-352-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-08-30 323-645-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2005-08-30 323-645-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2005-08-30 323-677-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2005-08-30 323-677-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2005-08-29 323-274-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 03 CA
2005-08-29 323-386-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2005-08-29 323-386-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA

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.