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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-12-12 951-477-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MURRIETA CA
2019-12-05 951-855-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2019-12-05 951-855-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2019-11-27 951-477-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MURRIETA CA
2019-11-27 951-516-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SUN CITY CA
2019-11-22 951-460-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D CORONA CA
2019-11-15 951-513-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2019-11-15 951-513-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2019-11-15 951-513-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2019-11-15 951-513-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2019-11-15 951-513-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2019-11-15 951-513-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HEMT HMLD CA
2019-11-15 951-539-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2019-11-15 951-539-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2019-11-13 951-359-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2019-11-12 951-299-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2019-11-11 951-508-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CORONA CA
2019-11-06 951-855-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2019-10-23 951-503-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2019-10-23 951-637-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2019-10-09 951-602-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ARLINGTON CA
2019-10-03 951-855-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2019-10-02 951-507-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIRA LOMA CA
2019-09-30 951-988-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2019-09-30 951-988-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MORENO CA
2019-09-24 951-988-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MORENO CA
2019-09-11 951-481-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WOODCREST CA
2019-09-03 951-503-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PERRIS CA
2019-08-15 951-503-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PERRIS CA
2019-08-15 951-637-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2019-08-15 951-855-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TEMSCL CNY CA
2019-08-13 951-460-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J CORONA CA
2019-08-13 951-466-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2019-08-13 951-466-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2019-08-13 951-498-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2019-08-13 951-498-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C ELSINORE CA
2019-08-13 951-501-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C TEMECULA CA
2019-08-13 951-502-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2019-08-13 951-502-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HEMT HEMT CA
2019-08-13 951-799-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HEMT ANZA CA
2019-08-13 951-855-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C TEMSCL CNY CA
2019-08-13 951-988-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C MORENO CA
2019-08-13 951-988-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MORENO CA
2019-08-09 951-470-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2019-08-09 951-470-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2019-08-09 951-470-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ARLINGTON CA
2019-08-05 951-451-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HEMT SNJC CA
2019-08-05 951-499-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BANNING CA
2019-08-05 951-499-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BANNING CA
2019-07-16 951-470-0XXX 0000–0999Assigned TELNYX LLC 073H 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.