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
2004-08-30 323-517-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MONTEBELLO CA
2004-08-21 323-274-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 03 CA
2004-08-21 323-319-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2004-08-13 323-313-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2004-08-13 323-313-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2004-08-13 323-326-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-08-13 323-326-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-08-13 323-513-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-08-13 323-513-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-08-13 323-513-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-08-13 323-513-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-08-10 323-275-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2004-08-10 323-321-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-08-06 323-384-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-08-06 323-384-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-08-06 323-384-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-08-06 323-384-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-08-05 323-403-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2004-08-05 323-517-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-08-05 323-517-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-08-04 323-302-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-07-21 323-772-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-07-13 323-360-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2004-07-01 323-552-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-06-24 323-317-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2004-06-22 323-202-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-06-22 323-286-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-06-22 323-316-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-06-22 323-316-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-06-22 323-947-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-06-22 323-947-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-06-22 323-947-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-06-11 323-898-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2004-06-10 323-204-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-06-10 323-204-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-06-10 323-204-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-06-10 323-204-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-06-10 323-326-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-06-10 323-326-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-06-09 323-321-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-06-09 323-321-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-06-08 323-317-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2004-06-08 323-820-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-05-27 323-370-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2004-05-27 323-492-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-05-21 323-286-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-05-21 323-286-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-05-18 323-302-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-05-09 323-947-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-05-09 323-947-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO 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.