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
2020-08-25 858-289-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-08-11 858-289-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG LVTA CA
2020-07-24 858-301-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-07-24 858-301-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-07-24 858-301-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-07-10 858-599-9XXX 9000–9999Assigned FRACTEL, LLC 965H NATIONALCY CA
2020-07-10 858-867-5XXX 5000–5999Assigned FRACTEL, LLC 965H SNDG SNDG CA
2020-07-02 858-294-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2020-06-19 858-301-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-06-19 858-301-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-06-19 858-301-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-06-19 858-301-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-06-19 858-301-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-06-17 858-788-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H LA JOLLA CA
2020-06-17 858-788-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H LA JOLLA CA
2020-06-17 858-788-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LA JOLLA CA
2020-06-11 858-301-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D EL CAJON CA
2020-06-11 858-301-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D EL CAJON CA
2020-06-09 858-290-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D DEL MAR CA
2020-06-09 858-834-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2020-06-09 858-834-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2020-06-09 858-977-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D DEL MAR CA
2020-06-02 858-289-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D SNDG LVTA CA
2020-06-02 858-289-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D SNDG LVTA CA
2020-05-15 858-788-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D LA JOLLA CA
2020-05-15 858-788-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D LA JOLLA CA
2020-05-13 858-289-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-05-12 858-290-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2020-05-12 858-290-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2020-05-11 858-298-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-05-11 858-298-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-03-30 858-298-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-03-30 858-298-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-03-30 858-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H DEL MAR CA
2020-03-16 858-298-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG LVTA CA
2020-03-16 858-914-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOSANFE CA
2020-03-16 858-914-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RNCHOSANFE CA
2020-03-10 858-868-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNDG SNDG CA
2020-02-13 858-988-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2020-02-13 858-988-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNDG SNDG CA
2020-02-07 858-298-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2020-02-07 858-298-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2020-02-06 858-388-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-02-06 858-388-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-02-06 858-388-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CAJON CA
2020-02-04 858-290-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2020-02-04 858-290-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C DEL MAR CA
2020-02-04 858-298-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-02-04 858-298-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2020-02-04 858-434-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS 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.