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
2020-10-13 951-946-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2020-10-12 951-554-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2020-10-12 951-554-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2020-10-12 951-554-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2020-10-07 951-554-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H RIVERSIDE CA
2020-10-07 951-644-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BANNING CA
2020-10-05 951-933-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C PERRIS CA
2020-10-05 951-946-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HEMT SNJC CA
2020-10-05 951-946-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HEMT SNJC CA
2020-10-01 951-556-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2020-10-01 951-556-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2020-10-01 951-556-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLINGTON CA
2020-09-29 951-557-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-09-24 951-546-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-09-24 951-546-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-09-24 951-546-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-09-24 951-933-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2020-09-24 951-933-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2020-09-23 951-933-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2020-09-21 951-498-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D ELSINORE CA
2020-09-21 951-535-1XXX 1000–1999Assigned METROPCS NETWORKS, LLC 899D MURRIETA CA
2020-09-21 951-724-6XXX 6000–6999Assigned FRACTEL, LLC 965H HEMT HMLD CA
2020-09-21 951-933-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D PERRIS CA
2020-09-20 951-577-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D CORONA CA
2020-09-18 951-844-4XXX 4000–4999Assigned FRACTEL, LLC 965H IDYLLWILD CA
2020-09-14 951-481-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 WOODCREST CA
2020-09-09 951-554-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-09 951-988-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2020-09-04 951-548-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-548-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-09-04 951-933-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2020-09-01 951-481-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2020-09-01 951-535-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2020-09-01 951-548-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2020-08-27 951-480-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-08-27 951-480-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-08-27 951-542-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2020-08-27 951-546-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-08-27 951-546-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-08-27 951-546-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-08-27 951-546-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-08-25 951-933-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2020-08-21 951-542-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE 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.