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
2004-12-08 323-781-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-11-24 323-334-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2004-11-24 323-603-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2004-11-22 323-784-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LSAN DA 13 CA
2004-11-19 323-284-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 02 CA
2004-11-16 323-202-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-11-16 323-381-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-11-16 323-381-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-11-16 323-381-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-11-04 323-317-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2004-11-04 323-317-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2004-11-02 323-404-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-404-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-404-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-404-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-404-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-404-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-509-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-509-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-509-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-11-02 323-509-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-10-27 323-321-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-10-22 323-500-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2004-10-22 323-500-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-10-15 323-210-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 02 CA
2004-10-15 323-370-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-10-15 323-370-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-10-13 323-306-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 08 CA
2004-10-11 323-384-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2004-10-07 323-302-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
2004-10-06 323-843-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 05 CA
2004-10-04 323-217-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2004-10-04 323-403-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2004-09-30 323-315-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 02 CA
2004-09-28 323-321-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-09-23 323-271-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-09-23 323-271-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-09-20 323-500-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-09-20 323-500-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2004-09-16 323-302-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 13 CA
2004-09-13 323-326-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-09-13 323-326-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-09-13 323-679-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2004-09-13 323-919-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-09-13 323-919-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-09-13 323-919-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2004-09-09 323-302-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2004-09-07 323-215-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2004-09-07 323-271-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MONTEBELLO CA
2004-08-31 323-373-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 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.