NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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 14
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
2019-07-09 951-460-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2019-06-25 951-460-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 CORONA CA
2019-06-24 951-466-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TEMECULA CA
2019-06-14 951-466-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMECULA CA
2019-06-14 951-503-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2019-06-10 951-503-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2019-05-22 951-799-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HEMT ANZA CA
2019-05-20 951-499-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C BANNING CA
2019-05-20 951-499-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C BANNING CA
2019-05-14 951-261-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2019-05-14 951-261-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2019-05-14 951-855-5XXX 5000–5999Assigned FRACTEL, LLC 965H TEMSCL CNY CA
2019-05-14 951-877-7XXX 7000–7999Assigned FRACTEL, LLC 965H RIVERSIDE CA
2019-05-14 951-888-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2019-05-14 951-933-3XXX 3000–3999Assigned FRACTEL, LLC 965H PERRIS CA
2019-05-14 951-988-8XXX 8000–8999Assigned FRACTEL, LLC 965H MORENO CA
2019-05-08 951-502-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2019-05-08 951-502-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2019-05-03 951-451-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2019-04-29 951-512-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 RIVERSIDE CA
2019-04-23 951-799-9XXX 9000–9999Assigned HD CARRIER LLC 321J HEMT ANZA CA
2019-04-16 951-425-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2019-04-12 951-336-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C CORONA CA
2019-04-12 951-470-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2019-03-28 951-503-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2019-03-27 951-477-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2019-03-27 951-477-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2019-03-27 951-477-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2019-03-27 951-477-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MURRIETA CA
2019-03-19 951-451-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2019-03-19 951-456-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MIRA LOMA CA
2019-03-19 951-477-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2019-03-19 951-477-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2019-03-19 951-783-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J RIVERSIDE CA
2019-03-18 951-518-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2019-03-18 951-518-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MORENO CA
2019-03-15 951-498-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D ELSINORE CA
2019-03-15 951-502-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2019-03-15 951-502-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2019-02-27 951-450-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PERRIS CA
2019-02-27 951-450-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C PERRIS CA
2019-02-25 951-222-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2019-02-25 951-261-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RIVERSIDE CA
2019-02-15 951-903-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2019-02-15 951-934-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2019-02-11 951-481-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2019-02-06 951-366-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2019-02-06 951-366-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAKEVIEWNU CA
2019-02-06 951-430-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SUN CITY CA
2019-02-06 951-566-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SUN CITY 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.