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
2014-11-24 858-264-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2014-11-20 858-779-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 RNCHOSANFE CA
2014-11-19 858-943-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2014-11-19 858-943-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2014-11-19 858-943-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2014-11-14 858-378-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-11-14 858-378-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-11-14 858-378-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-11-14 858-378-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-11-14 858-378-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-11-14 858-378-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-10-29 858-226-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2014-10-29 858-226-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2014-10-29 858-226-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2014-10-29 858-226-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2014-10-28 858-583-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG LVTA CA
2014-10-21 858-943-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOBRNDO CA
2014-10-16 858-252-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2014-10-16 858-252-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2014-10-16 858-295-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2014-10-16 858-295-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C LA JOLLA CA
2014-10-10 858-252-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2014-10-03 858-226-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNDG MRMS CA
2014-10-03 858-284-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2014-10-03 858-295-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2014-10-01 858-257-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2014-10-01 858-257-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA JOLLA CA
2014-10-01 858-780-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2014-10-01 858-780-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2014-09-30 858-212-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C POWAY CA
2014-09-30 858-213-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C POWAY CA
2014-09-30 858-247-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2014-09-30 858-247-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2014-09-30 858-879-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2014-09-30 858-879-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RNCHOBRNDO CA
2014-09-12 858-291-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 LA JOLLA CA
2014-09-11 858-226-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-09-11 858-226-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-09-11 858-226-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-09-11 858-226-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG MRMS CA
2014-09-10 858-291-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA JOLLA CA
2014-09-10 858-291-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J LA JOLLA CA
2014-09-04 858-291-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LA JOLLA CA
2014-09-03 858-291-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LA JOLLA CA
2014-09-02 858-287-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2014-09-02 858-779-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2014-09-02 858-779-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2014-08-29 858-284-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DEL MAR CA
2014-08-29 858-683-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOBRNDO CA
2014-08-27 858-266-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNDG LVTA 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.