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
2003-12-23 323-275-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LSAN DA 04 CA
2003-12-10 323-317-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2003-12-10 323-317-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2003-12-10 323-317-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 04 CA
2003-11-26 323-992-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 09 CA
2003-11-26 323-992-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 09 CA
2003-11-24 323-203-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-11-24 323-217-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-11-18 323-360-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2003-11-14 323-212-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-11-14 323-212-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-11-14 323-212-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-11-14 323-212-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2003-11-14 323-402-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 11 CA
2003-11-14 323-402-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 11 CA
2003-11-07 323-204-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-383-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-383-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-383-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-383-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-383-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-383-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-11-07 323-395-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-10-27 323-595-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 13 CA
2003-10-20 323-200-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D LSAN DA 12 CA
2003-10-20 323-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2003-10-20 323-200-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LSAN DA 12 CA
2003-10-17 323-580-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LSAN DA 14 CA
2003-09-25 323-316-1XXX 1000–1999Assigned IP HORIZON LLC 515J LSAN DA 03 CA
2003-09-25 323-316-2XXX 2000–2999Assigned IP HORIZON LLC 515J LSAN DA 03 CA
2003-09-19 323-205-1XXX 1000–1999Assigned IP HORIZON LLC 515J LSAN DA 04 CA
2003-09-19 323-205-2XXX 2000–2999Assigned IP HORIZON LLC 515J LSAN DA 04 CA
2003-09-19 323-209-1XXX 1000–1999Assigned IP HORIZON LLC 515J LSAN DA 13 CA
2003-09-19 323-209-2XXX 2000–2999Assigned IP HORIZON LLC 515J LSAN DA 13 CA
2003-09-19 323-431-1XXX 1000–1999Assigned IP HORIZON LLC 515J LSAN DA 12 CA
2003-09-19 323-431-2XXX 2000–2999Assigned IP HORIZON LLC 515J LSAN DA 12 CA
2003-09-16 323-472-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LSAN DA 14 CA
2003-09-12 323-351-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-09-12 323-351-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-09-12 323-351-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-09-12 323-351-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-09-12 323-351-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-09-12 323-351-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 CA
2003-09-12 323-351-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 06 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.