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
2006-02-27 323-861-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-02-27 323-861-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-02-20 323-423-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-02-07 323-379-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2006-02-07 323-379-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2006-02-07 323-379-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2006-02-06 323-325-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 08 CA
2006-02-06 323-643-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 11 CA
2006-02-06 323-696-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 09 CA
2006-02-06 323-792-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 12 CA
2006-02-06 323-928-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 02 CA
2006-02-06 323-999-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 03 CA
2006-02-03 323-423-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-02-03 323-423-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-02-03 323-423-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-01-26 323-424-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 13 CA
2006-01-25 323-803-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-01-13 323-637-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-01-13 323-637-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-01-13 323-637-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-01-13 323-637-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-01-13 323-637-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-01-13 323-637-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-01-13 323-678-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-01-10 323-344-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-01-10 323-373-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 11 CA
2006-01-10 323-404-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-01-10 323-636-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-01-10 323-636-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-01-10 323-636-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-01-10 323-636-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-01-05 323-203-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2006-01-05 323-203-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2005-12-29 323-306-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 08 CA
2005-12-29 323-306-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 08 CA
2005-12-29 323-825-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2005-12-29 323-825-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2005-12-27 323-541-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2005-12-21 323-540-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-12-21 323-540-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-12-21 323-792-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 12 CA
2005-12-21 323-843-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C LSAN DA 05 CA
2005-12-20 323-803-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C MONTEBELLO CA
2005-12-15 323-482-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2005-12-07 323-527-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2005-12-07 323-527-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 09 CA
2005-12-07 323-580-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 14 CA
2005-12-05 323-877-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2005-12-05 323-877-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2005-12-01 323-540-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 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.