NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 909
ONVOY, LLC - CA 1
BANDWIDTH.COM CLEC, 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
2014-11-26 909-551-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DIAMONDBAR CA
2014-11-26 909-657-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ONTARIO CA
2014-11-25 909-657-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D ONTARIO CA
2014-11-25 909-665-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2014-11-21 909-674-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2014-11-21 909-674-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2014-11-21 909-674-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2014-11-20 909-492-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MENTONE CA
2014-11-20 909-492-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MENTONE CA
2014-11-20 909-662-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHINO CA
2014-11-19 909-637-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2014-11-18 909-492-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MENTONE CA
2014-11-18 909-541-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K CLAREMONT CA
2014-11-17 909-443-7XXX 7000–7999Assigned TWC IP ENABLED SERVICES, LLC 793K ONTARIO CA
2014-11-17 909-654-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2014-11-17 909-654-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2014-11-17 909-654-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2014-11-10 909-662-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-11-10 909-662-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-10-28 909-572-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C COLTON CA
2014-10-24 909-551-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DIAMONDBAR CA
2014-10-20 909-551-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K DIAMONDBAR CA
2014-10-16 909-325-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CHINO CA
2014-10-16 909-990-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIALTO CA
2014-10-14 909-552-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2014-10-14 909-552-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2014-10-13 909-443-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D ONTARIO CA
2014-10-13 909-552-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2014-10-13 909-637-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C FONTANA CA
2014-10-13 909-637-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FONTANA CA
2014-10-08 909-552-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C UPLAND CA
2014-10-08 909-552-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C UPLAND CA
2014-10-03 909-443-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ONTARIO CA
2014-10-03 909-487-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CRESTLINE CA
2014-10-03 909-582-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 ARROWHEAD CA
2014-10-02 909-443-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ONTARIO CA
2014-10-02 909-582-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARROWHEAD CA
2014-10-02 909-990-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RIALTO CA
2014-10-01 909-531-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C S BERNDINO CA
2014-10-01 909-531-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C S BERNDINO CA
2014-09-29 909-536-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2014-09-25 909-541-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-09-25 909-541-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-09-24 909-536-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2014-09-24 909-536-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2014-09-22 909-642-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2014-09-22 909-642-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 FONTANA CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.