NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 650
ONVOY, LLC - CA 11
T-MOBILE USA, INC. 4
BANDWIDTH.COM CLEC, LLC - CA 2
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
2016-09-01 650-448-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MT VIEW CA
2016-08-30 650-447-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2016-08-30 650-484-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SAN MATEO CA
2016-08-30 650-509-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PALO ALTO CA
2016-08-30 650-620-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNCRL-BLMT CA
2016-08-29 650-451-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PACIFICA CA
2016-08-29 650-670-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F REDWOOD CY CA
2016-08-26 650-689-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MILLBRAE CA
2016-08-24 650-680-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LOS ALTOS CA
2016-08-24 650-750-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HALFMOONBY CA
2016-08-16 650-203-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2016-08-16 650-275-0XXX 0000–0999Assigned IP HORIZON LLC 515J WOODSIDE CA
2016-08-16 650-290-9XXX 9000–9999Assigned IP HORIZON LLC 515J PACIFICA CA
2016-08-16 650-297-9XXX 9000–9999Assigned IP HORIZON LLC 515J PESCADERO CA
2016-08-16 650-410-6XXX 6000–6999Assigned IP HORIZON LLC 515J SSNFRNCSCO CA
2016-08-16 650-435-6XXX 6000–6999Assigned IP HORIZON LLC 515J SAN MATEO CA
2016-08-16 650-499-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2016-08-16 650-499-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2016-08-16 650-509-6XXX 6000–6999Assigned IP HORIZON LLC 515J PALO ALTO CA
2016-08-16 650-535-6XXX 6000–6999Assigned IP HORIZON LLC 515J MOSS BEACH CA
2016-08-16 650-594-7XXX 7000–7999Assigned IP HORIZON LLC 515J SNCRL-BLMT CA
2016-08-16 650-670-1XXX 1000–1999Assigned IP HORIZON LLC 515J REDWOOD CY CA
2016-08-16 650-680-0XXX 0000–0999Assigned IP HORIZON LLC 515J LOS ALTOS CA
2016-08-16 650-686-4XXX 4000–4999Assigned IP HORIZON LLC 515J MILLBRAE CA
2016-08-16 650-747-7XXX 7000–7999Assigned IP HORIZON LLC 515J LA HONDA CA
2016-08-16 650-750-9XXX 9000–9999Assigned IP HORIZON LLC 515J HALFMOONBY CA
2016-08-08 650-250-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2016-08-08 650-509-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2016-08-08 650-942-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MILLBRAE CA
2016-08-08 650-942-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MILLBRAE CA
2016-08-03 650-250-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2016-07-29 650-453-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2016-07-29 650-597-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2016-07-27 650-410-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2016-07-26 650-250-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2016-07-26 650-250-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2016-07-26 650-499-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2016-07-25 650-662-3XXX 3000–3999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-662-7XXX 7000–7999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-662-8XXX 8000–8999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-662-9XXX 9000–9999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-0XXX 0000–0999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-1XXX 1000–1999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-4XXX 4000–4999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-5XXX 5000–5999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-6XXX 6000–6999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-8XXX 8000–8999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-673-9XXX 9000–9999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-748-1XXX 1000–1999Assigned HD CARRIER LLC 321J LA HONDA CA
2016-07-25 650-748-3XXX 3000–3999Assigned HD CARRIER LLC 321J LA HONDA 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.