NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 13
EXIANT COMMUNICATIONS LLC 2
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
2019-08-29 858-296-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-296-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNDG LVTA CA
2019-08-29 858-404-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2019-08-19 858-214-1XXX 1000–1999Assigned TELNYX LLC 073H LA JOLLA CA
2019-08-14 858-290-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2019-08-14 858-290-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2019-08-14 858-290-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2019-08-14 858-293-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2019-08-14 858-585-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LA MESA CA
2019-08-14 858-834-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2019-08-14 858-956-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C POWAY CA
2019-08-13 858-257-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LA JOLLA CA
2019-08-01 858-294-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2019-08-01 858-294-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2019-08-01 858-294-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2019-07-30 858-294-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHULAVISTA CA
2019-07-30 858-294-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHULAVISTA CA
2019-07-23 858-294-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHULAVISTA CA
2019-07-23 858-294-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CHULAVISTA CA
2019-06-12 858-266-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2019-06-11 858-214-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LA JOLLA CA
2019-06-06 858-302-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2019-05-30 858-293-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG MRMS CA
2019-05-16 858-293-2XXX 2000–2999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
2019-05-16 858-293-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNDG MRMS CA
2019-05-08 858-286-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2019-05-07 858-429-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG LVTA CA
2019-04-30 858-585-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA MESA CA
2019-04-30 858-585-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA MESA CA
2019-04-29 858-302-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG LVTA CA
2019-04-10 858-269-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 POWAY CA
2019-04-04 858-247-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J LA JOLLA CA
2019-03-19 858-286-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2019-03-19 858-388-8XXX 8000–8999Assigned FRACTEL, LLC 965H EL CAJON CA
2019-03-19 858-585-8XXX 8000–8999Assigned FRACTEL, LLC 965H LA MESA CA
2019-03-19 858-788-8XXX 8000–8999Assigned FRACTEL, LLC 965H LA JOLLA CA
2019-03-19 858-988-8XXX 8000–8999Assigned FRACTEL, LLC 965H SNDG SNDG CA
2019-03-15 858-269-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2019-03-14 858-302-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2019-02-28 858-290-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEL MAR CA
2019-02-25 858-733-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2019-02-08 858-269-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 POWAY 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.