NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2005-08-01 323-275-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-08-01 323-275-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-07-29 323-318-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LSAN DA 05 CA
2005-07-27 323-456-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2005-07-27 323-516-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MONTEBELLO CA
2005-07-27 323-556-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2005-07-27 323-835-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LSAN DA 06 CA
2005-07-26 323-684-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-07-26 323-684-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-07-26 323-684-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-07-26 323-684-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-07-26 323-684-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-07-26 323-684-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-07-07 323-205-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-07-07 323-241-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2005-07-07 323-307-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2005-06-29 323-346-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-06-29 323-346-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-06-29 323-346-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-06-29 323-346-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-06-20 323-282-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2005-06-20 323-319-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2005-06-20 323-319-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 06 CA
2005-06-20 323-982-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 03 CA
2005-06-20 323-982-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 03 CA
2005-06-20 323-999-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 03 CA
2005-06-13 323-205-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LSAN DA 04 CA
2005-06-07 323-205-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2005-05-31 323-348-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2005-05-31 323-474-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-05-31 323-916-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-05-31 323-916-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LSAN DA 03 CA
2005-05-27 323-552-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA
2005-05-27 323-942-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 09 CA
2005-05-24 323-326-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-05-24 323-513-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-05-24 323-513-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-05-24 323-513-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-05-24 323-617-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2005-05-24 323-973-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-05-24 323-973-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2005-05-19 323-215-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MONTEBELLO CA
2005-05-18 323-803-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2005-05-18 323-803-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D MONTEBELLO CA
2005-05-16 323-490-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2005-05-16 323-490-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2005-05-16 323-803-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MONTEBELLO CA
2005-05-13 323-516-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2005-05-13 323-516-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MONTEBELLO CA
2005-05-13 323-527-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LSAN DA 09 CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.