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
2007-12-21 909-257-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 UPLAND CA
2007-12-11 909-643-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2007-11-29 909-544-5XXX 5000–5999Assigned PACIFIC BELL (COMPETITIVE) 7480 ONTARIO CA
2007-11-21 909-257-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 UPLAND CA
2007-11-21 909-971-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLAREMONT CA
2007-11-20 909-248-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D CHINO CA
2007-11-20 909-248-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D CHINO CA
2007-11-16 909-907-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J HIGHLAND CA
2007-11-15 909-202-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FONTANA CA
2007-11-12 909-222-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2007-11-09 909-218-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ONTARIO CA
2007-11-09 909-839-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DIAMONDBAR CA
2007-11-07 909-436-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARROWHEAD CA
2007-11-07 909-436-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARROWHEAD CA
2007-11-07 909-475-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MARSHALL CA
2007-11-07 909-827-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2007-11-07 909-894-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDLANDS CA
2007-11-07 909-918-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CALIMESA CA
2007-11-06 909-367-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2007-11-06 909-367-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2007-11-06 909-685-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIALTO CA
2007-10-29 909-367-7XXX 7000–7999Assigned FRONTIER CALIFORNIA INC. 2319 UPLAND CA
2007-10-29 909-809-3XXX 3000–3999Assigned FRONTIER CALIFORNIA INC. 2319 REDLANDS CA
2007-10-22 909-348-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DIAMONDBAR CA
2007-10-22 909-367-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 UPLAND CA
2007-10-19 909-248-0XXX 0000–0999Assigned TWC IP ENABLED SERVICES, LLC 793K CHINO CA
2007-10-19 909-248-1XXX 1000–1999Assigned TWC IP ENABLED SERVICES, LLC 793K CHINO CA
2007-10-18 909-206-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MENTONE CA
2007-10-18 909-542-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2007-10-18 909-542-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2007-10-18 909-542-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CLAREMONT CA
2007-10-15 909-809-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2007-10-04 909-894-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 REDLANDS CA
2007-10-03 909-244-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K UPLAND CA
2007-09-27 909-827-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 FONTANA CA
2007-09-18 909-362-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HIGHLAND CA
2007-09-14 909-247-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2007-09-14 909-247-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2007-09-14 909-247-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2007-09-14 909-247-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHINO CA
2007-09-13 909-237-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIALTO CA
2007-09-07 909-685-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RIALTO CA
2007-08-27 909-251-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K FONTANA CA
2007-08-21 909-689-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ETIWANDA CA
2007-08-20 909-278-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2007-08-20 909-278-3XXX 3000–3999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2007-08-20 909-278-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2007-08-20 909-278-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2007-08-20 909-367-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2007-08-20 909-367-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND 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.