NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 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
2004-04-27 323-313-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2004-04-27 323-313-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2004-04-16 323-820-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-04-15 323-704-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2004-04-15 323-704-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2004-04-13 323-209-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2004-04-13 323-384-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-04-13 323-384-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-04-13 323-384-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-04-13 323-967-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 09 CA
2004-04-01 323-947-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-04-01 323-947-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-03-30 323-321-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-03-30 323-321-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-03-25 323-606-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2004-03-24 323-947-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-03-23 323-307-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2004-03-15 323-992-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2004-03-09 323-209-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2004-03-08 323-286-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-03-08 323-286-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-03-04 323-202-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2004-03-04 323-781-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-03-01 323-200-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2004-03-01 323-200-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2004-03-01 323-200-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2004-02-27 323-980-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2004-02-20 323-403-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2004-02-16 323-352-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 LSAN DA 04 CA
2004-01-29 323-943-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2004-01-23 323-992-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 09 CA
2004-01-15 323-388-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-388-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-388-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-388-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-605-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-919-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-919-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-919-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-919-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-919-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-01-15 323-992-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 09 CA
2004-01-13 323-202-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2004-01-08 323-244-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-01-08 323-244-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-01-05 323-360-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2003-12-30 323-202-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2003-12-30 323-202-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2003-12-30 323-334-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-12-25 323-595-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 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.