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
2021-05-08 858-313-7XXX 7000–7999Assigned COMMIO, LLC 939H DEL MAR CA
2021-05-08 858-313-8XXX 8000–8999Assigned COMMIO, LLC 939H DEL MAR CA
2021-05-05 858-308-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG LVTA CA
2021-05-04 858-308-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-05-04 858-308-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-05-04 858-308-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-05-04 858-308-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-05-04 858-308-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNDG LVTA CA
2021-05-04 858-399-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CORONADO CA
2021-05-04 858-567-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LA JOLLA CA
2021-05-04 858-786-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F NATIONALCY CA
2021-05-04 858-910-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CHULAVISTA CA
2021-04-28 858-289-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2021-04-26 858-319-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H LA JOLLA CA
2021-04-23 858-744-4XXX 4000–4999Assigned FRACTEL, LLC 965H SNDG SNDG CA
2021-04-23 858-855-5XXX 5000–5999Assigned FRACTEL, LLC 965H EL CAJON CA
2021-04-22 858-567-8XXX 8000–8999Assigned FRACTEL, LLC 965H LA JOLLA CA
2021-04-12 858-399-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CORONADO CA
2021-04-12 858-399-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CORONADO CA
2021-04-12 858-399-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONADO CA
2021-04-01 858-319-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2021-04-01 858-319-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2021-04-01 858-319-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2021-04-01 858-910-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2021-03-24 858-305-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2021-03-24 858-305-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2021-03-24 858-319-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-24 858-319-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-24 858-319-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-24 858-319-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-24 858-319-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-22 858-241-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-22 858-241-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LA JOLLA CA
2021-03-22 858-746-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-03-22 858-762-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-03-22 858-762-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-03-22 858-901-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-901-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-901-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-905-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-03-22 858-956-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 POWAY CA
2021-03-16 858-466-6XXX 6000–6999Assigned FRACTEL, LLC 965H LA MESA CA
2021-03-16 858-786-7XXX 7000–7999Assigned FRACTEL, LLC 965H NATIONALCY CA
2021-03-12 858-313-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEL MAR 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.