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
2007-10-30 323-710-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-10-30 323-710-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-10-30 323-710-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-10-30 323-710-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-10-30 323-710-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-10-30 323-710-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2007-10-26 323-998-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2007-10-25 323-532-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-532-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-532-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-532-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-542-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-542-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-542-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-542-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-25 323-542-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-10-24 323-283-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-24 323-283-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-24 323-283-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-24 323-283-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-24 323-283-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-24 323-283-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-24 323-283-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2007-10-16 323-641-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 11 CA
2007-10-10 323-703-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2007-09-27 323-629-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-27 323-629-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-27 323-629-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-27 323-629-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-27 323-680-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-27 323-680-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-27 323-680-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-26 323-614-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-26 323-614-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-26 323-614-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-26 323-614-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-26 323-614-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2007-09-24 323-977-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2007-09-13 323-203-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2007-09-07 323-378-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2007-08-31 323-542-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-08-31 323-542-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-08-31 323-542-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-08-31 323-542-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-08-31 323-542-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2007-08-31 323-590-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-08-31 323-590-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-08-31 323-590-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-08-31 323-590-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2007-08-31 323-590-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 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.