NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 858
ONVOY, LLC - CA 20
EXIANT COMMUNICATIONS LLC 2
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 1
NEW CINGULAR WIRELESS PCS, LLC 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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
2008-07-22 858-210-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2008-07-16 858-750-2XXX 2000–2999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2008-07-16 858-750-3XXX 3000–3999Assigned TWC IP ENABLED SERVICES, LLC 793K LA JOLLA CA
2008-07-10 858-200-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J LA JOLLA CA
2008-07-10 858-412-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LA JOLLA CA
2008-06-24 858-750-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2008-06-13 858-568-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2008-06-12 858-836-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2008-06-04 858-848-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 POWAY CA
2008-05-07 858-397-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG MRMS CA
2008-05-07 858-769-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2008-05-07 858-769-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2008-05-06 858-997-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2008-05-06 858-997-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2008-05-05 858-668-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POWAY CA
2008-05-05 858-997-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2008-05-05 858-997-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2008-04-30 858-504-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2008-04-30 858-751-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2008-04-30 858-935-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2008-04-29 858-371-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2008-04-29 858-461-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2008-04-29 858-683-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2008-04-29 858-746-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C POWAY CA
2008-04-24 858-768-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2008-04-08 858-762-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J POWAY CA
2008-04-08 858-762-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J POWAY CA
2008-04-08 858-762-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J POWAY CA
2008-04-02 858-598-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2008-03-25 858-966-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J SNDG LVTA CA
2008-03-18 858-668-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C POWAY CA
2008-02-22 858-312-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RNCHOBRNDO CA
2008-02-15 858-240-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K RNCHOPNQTS CA
2008-02-05 858-703-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEL MAR CA
2008-02-04 858-386-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 POWAY CA
2008-02-01 858-492-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2008-02-01 858-496-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2008-01-30 858-771-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOSANFE CA
2008-01-22 858-429-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2008-01-21 858-381-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOSANFE CA
2008-01-21 858-779-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J RNCHOSANFE CA
2008-01-17 858-429-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG LVTA CA
2008-01-11 858-776-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RNCHOBRNDO CA
2008-01-08 858-397-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2008-01-03 858-537-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2007-12-10 858-480-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 DEL MAR CA
2007-12-10 858-617-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 DEL MAR CA
2007-12-03 858-598-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2007-12-03 858-598-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K SNDG LVTA CA
2007-11-27 858-432-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J RNCHOBRNDO 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.