NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

27 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 951
ONVOY, LLC - CA 25
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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
2022-02-16 951-638-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J TEMSCL CNY CA
2022-02-04 951-598-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2022-01-31 951-607-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2022-01-31 951-607-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LAKEVIEWNU CA
2022-01-28 951-598-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ARLINGTON CA
2022-01-28 951-598-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ARLINGTON CA
2022-01-25 951-605-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2022-01-24 951-607-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2022-01-24 951-607-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2022-01-21 951-799-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HEMT ANZA CA
2022-01-06 951-622-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2022-01-06 951-622-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2022-01-06 951-622-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2021-12-21 951-799-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HEMT ANZA CA
2021-12-21 951-904-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-12-21 951-904-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-12-21 951-904-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-12-21 951-904-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-12-21 951-904-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2021-12-17 951-606-5XXX 5000–5999Assigned TELNYX LLC 073H SUN CITY CA
2021-12-17 951-622-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2021-12-17 951-627-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2021-12-17 951-875-0XXX 0000–0999Assigned TELNYX LLC 073H BANNING CA
2021-12-16 951-556-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ARLINGTON CA
2021-12-16 951-592-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H RIVERSIDE CA
2021-12-16 951-592-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H RIVERSIDE CA
2021-12-16 951-592-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H RIVERSIDE CA
2021-12-16 951-592-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H RIVERSIDE CA
2021-12-16 951-597-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H CORONA CA
2021-12-16 951-597-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CORONA CA
2021-12-16 951-597-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CORONA CA
2021-12-16 951-597-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CORONA CA
2021-12-16 951-606-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SUN CITY CA
2021-12-16 951-606-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H SUN CITY CA
2021-12-16 951-606-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SUN CITY CA
2021-12-10 951-605-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2021-12-10 951-605-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2021-12-09 951-627-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2021-12-09 951-627-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2021-12-09 951-627-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2021-12-09 951-627-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2021-12-09 951-627-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2021-12-07 951-622-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MIRA LOMA CA
2021-11-22 951-606-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SUN CITY CA
2021-11-18 951-604-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2021-11-18 951-604-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2021-11-18 951-889-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2021-11-18 951-889-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2021-11-17 951-598-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2021-11-17 951-598-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON 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.