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
2020-05-22 951-521-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D RIVERSIDE CA
2020-05-22 951-521-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D RIVERSIDE CA
2020-05-22 951-680-4XXX 4000–4999Assigned METROPCS NETWORKS, LLC 899D RIVERSIDE CA
2020-05-07 951-519-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-05-07 951-519-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-04-20 951-521-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2020-04-20 951-521-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2020-04-13 951-507-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MIRA LOMA CA
2020-04-02 951-527-9XXX 9000–9999Assigned TELNYX LLC 073H IDYLLWILD CA
2020-04-01 951-517-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2020-03-25 951-539-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2020-03-25 951-539-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2020-03-25 951-539-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2020-03-18 951-521-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-18 951-521-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-18 951-521-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-18 951-521-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-18 951-521-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-16 951-508-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J CORONA CA
2020-03-16 951-877-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-16 951-877-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-03-16 951-877-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RIVERSIDE CA
2020-02-28 951-519-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-02-27 951-508-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2020-02-27 951-508-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CORONA CA
2020-02-26 951-433-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-02-20 951-460-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CORONA CA
2020-02-14 951-507-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2020-02-14 951-507-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2020-02-06 951-855-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-02-06 951-855-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2020-02-05 951-517-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TEMECULA CA
2020-02-05 951-651-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HEMT SNJC CA
2020-01-24 951-499-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BANNING CA
2020-01-23 951-822-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PERRIS CA
2020-01-14 951-499-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BANNING CA
2020-01-14 951-499-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BANNING CA
2020-01-14 951-499-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C BANNING CA
2020-01-14 951-758-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2020-01-14 951-877-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2020-01-14 951-877-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2020-01-14 951-877-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RIVERSIDE CA
2020-01-10 951-480-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-01-10 951-480-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HEMT HEMT CA
2020-01-10 951-507-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2020-01-09 951-855-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2019-12-18 951-394-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F RIVERSIDE CA
2019-12-18 951-499-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BANNING CA
2019-12-18 951-508-0XXX 0000–0999Assigned TELNYX LLC 073H CORONA CA
2019-12-13 951-481-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST 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.