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
2006-04-21 323-576-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2006-04-17 323-485-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2006-04-17 323-485-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2006-04-17 323-709-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2006-04-11 323-334-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 11 CA
2006-04-10 323-218-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2006-04-10 323-907-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-04-10 323-907-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-04-10 323-907-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-04-10 323-907-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-04-10 323-983-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-04-10 323-983-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2006-04-07 323-877-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2006-04-07 323-877-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2006-04-07 323-877-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 14 CA
2006-04-05 323-215-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-04-03 323-423-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-04-03 323-423-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-04-03 323-423-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-03-31 323-645-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LSAN DA 14 CA
2006-03-28 323-362-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2006-03-28 323-362-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2006-03-28 323-362-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2006-03-28 323-698-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 14 CA
2006-03-24 323-485-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-24 323-485-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2006-03-22 323-485-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-03-22 323-485-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-03-22 323-485-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-03-22 323-485-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-03-22 323-718-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-03-22 323-718-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2006-03-13 323-423-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-03-13 323-423-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2006-03-13 323-861-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-03-13 323-861-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-03-13 323-861-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-03-13 323-861-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-03-13 323-861-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2006-03-08 323-485-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MONTEBELLO CA
2006-03-07 323-861-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LSAN DA 09 CA
2006-03-06 323-386-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 11 CA
2006-03-02 323-718-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2006-03-02 323-718-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO 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.