NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 6
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2004-07-22 909-524-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2004-07-22 909-524-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2004-07-21 909-433-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2004-07-19 909-455-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-07-19 909-455-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-07-19 909-557-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2004-07-19 909-557-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDLANDS CA
2004-07-19 909-630-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-07-19 909-706-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POMONA CA
2004-07-19 909-921-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2004-07-19 909-921-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 UPLAND CA
2004-07-13 909-382-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 S BERNDINO CA
2004-07-01 909-380-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D S BERNDINO CA
2004-06-22 909-562-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIALTO CA
2004-06-22 909-991-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 S BERNDINO CA
2004-06-21 909-810-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MENTONE CA
2004-06-15 909-561-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2004-06-15 909-561-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2004-06-15 909-561-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2004-06-15 909-561-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FONTANA CA
2004-06-14 909-561-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2004-06-14 909-663-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2004-06-14 909-663-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 S BERNDINO CA
2004-06-14 909-919-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 UPLAND CA
2004-06-10 909-569-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 DIAMONDBAR CA
2004-06-09 909-562-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIALTO CA
2004-06-09 909-771-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D S BERNDINO CA
2004-06-04 909-495-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 S BERNDINO CA
2004-06-04 909-563-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 ONTARIO CA
2004-06-04 909-632-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POMONA CA
2004-06-03 909-561-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2004-06-03 909-561-8XXX 8000–8999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2004-06-03 909-570-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CALIMESA CA
2004-05-24 909-435-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDLANDS CA
2004-05-24 909-753-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D CLAREMONT CA
2004-05-24 909-753-7XXX 7000–7999Assigned METROPCS NETWORKS, LLC 899D CLAREMONT CA
2004-05-21 909-586-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIALTO CA
2004-05-21 909-586-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RIALTO CA
2004-05-19 909-554-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLTON CA
2004-05-18 909-380-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J S BERNDINO CA
2004-05-18 909-557-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J REDLANDS CA
2004-05-18 909-806-5XXX 5000–5999Assigned METROPCS NETWORKS, LLC 899D S BERNDINO CA
2004-05-18 909-890-6XXX 6000–6999Assigned METROPCS NETWORKS, LLC 899D S BERNDINO CA
2004-05-17 909-503-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 COLTON CA
2004-05-17 909-561-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FONTANA CA
2004-05-17 909-646-8XXX 8000–8999Assigned FRONTIER CALIFORNIA INC. 2319 ETIWANDA CA
2004-05-10 909-561-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2004-05-10 909-561-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D FONTANA CA
2004-05-05 909-438-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHINO CA
2004-05-05 909-438-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHINO 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.