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
2006-09-12 323-529-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2006-09-05 323-545-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2006-08-31 323-681-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-08-31 323-682-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-08-31 323-682-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-08-29 323-474-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K LSAN DA 03 CA
2006-08-22 323-743-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2006-08-22 323-799-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2006-08-17 323-787-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-08-17 323-787-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-08-17 323-787-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-08-17 323-787-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-08-17 323-787-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-08-16 323-246-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2006-08-16 323-246-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2006-08-16 323-246-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2006-08-14 323-861-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-08-14 323-861-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-08-10 323-617-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2006-08-10 323-617-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2006-08-04 323-742-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-08-04 323-742-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-08-03 323-843-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2006-07-31 323-919-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LSAN DA 06 CA
2006-07-18 323-599-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-07-17 323-872-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2006-07-17 323-872-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2006-07-17 323-872-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2006-07-13 323-274-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-07-13 323-274-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-07-07 323-799-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2006-07-05 323-529-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2006-07-05 323-742-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-06-27 323-315-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 02 CA
2006-06-27 323-338-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LSAN DA 02 CA
2006-06-27 323-362-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2006-06-27 323-540-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-06-27 323-684-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-06-27 323-742-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-06-27 323-875-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2006-06-23 323-686-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2006-06-23 323-872-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2006-06-22 323-599-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2006-06-22 323-599-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2006-06-22 323-599-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 09 CA
2006-06-22 323-767-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-06-15 323-545-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 12 CA
2006-06-14 323-282-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2006-06-13 323-599-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LSAN DA 09 CA
2006-06-12 323-406-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 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.