NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 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
2014-09-19 909-637-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FONTANA CA
2014-09-18 909-536-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2014-09-17 909-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2014-09-17 909-572-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 COLTON CA
2014-09-17 909-582-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ARROWHEAD CA
2014-09-17 909-990-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RIALTO CA
2014-09-16 909-572-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 COLTON CA
2014-09-15 909-328-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 REDLANDS CA
2014-09-15 909-478-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDLANDS CA
2014-09-15 909-637-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2014-09-10 909-541-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-09-10 909-541-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-09-10 909-541-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-09-10 909-541-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-09-10 909-552-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2014-09-10 909-552-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2014-09-10 909-582-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2014-09-10 909-582-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARROWHEAD CA
2014-09-03 909-552-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 UPLAND CA
2014-09-03 909-906-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D ONTARIO CA
2014-08-29 909-341-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIALTO CA
2014-08-29 909-345-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DIAMONDBAR CA
2014-08-29 909-359-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HIGHLAND CA
2014-08-29 909-491-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2014-08-29 909-536-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHINO CA
2014-08-29 909-536-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHINO CA
2014-08-29 909-541-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLAREMONT CA
2014-08-27 909-443-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ONTARIO CA
2014-08-27 909-443-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ONTARIO CA
2014-08-18 909-541-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-08-18 909-541-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2014-08-12 909-283-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDLANDS CA
2014-08-11 909-531-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2014-08-11 909-531-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2014-08-11 909-531-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2014-08-11 909-531-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2014-08-06 909-453-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 S BERNDINO CA
2014-08-05 909-536-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHINO CA
2014-08-05 909-536-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHINO CA
2014-08-05 909-536-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHINO CA
2014-08-05 909-572-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E COLTON CA
2014-08-05 909-572-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E COLTON CA
2014-07-31 909-359-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HIGHLAND CA
2014-07-31 909-359-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HIGHLAND CA
2014-07-31 909-454-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2014-07-31 909-454-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2014-07-31 909-454-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E S BERNDINO CA
2014-07-31 909-491-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FONTANA CA
2014-07-29 909-859-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DIAMONDBAR CA
2014-07-23 909-328-3XXX 3000–3999Assigned HD CARRIER LLC 321J REDLANDS 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.