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
2022-01-19 858-687-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J POWAY CA
2022-01-15 858-463-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2022-01-15 858-463-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2022-01-15 858-463-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2022-01-13 858-328-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2022-01-13 858-328-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2022-01-13 858-328-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LA MESA CA
2022-01-12 858-723-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J LA MESA CA
2022-01-12 858-742-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J SNDG LVTA CA
2022-01-11 858-462-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J NATIONALCY CA
2022-01-11 858-463-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J CHULAVISTA CA
2022-01-05 858-325-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2022-01-05 858-325-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2022-01-05 858-325-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG LVTA CA
2021-12-28 858-955-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PINEVALLEY CA
2021-12-20 858-328-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LA MESA CA
2021-12-20 858-328-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H LA MESA CA
2021-12-20 858-328-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LA MESA CA
2021-12-20 858-533-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HARBSNALPN CA
2021-12-20 858-533-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H HARBSNALPN CA
2021-12-17 858-533-9XXX 9000–9999Assigned TELNYX LLC 073H HARBSNALPN CA
2021-12-15 858-844-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H EL CAJON CA
2021-12-15 858-844-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H EL CAJON CA
2021-12-15 858-844-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H EL CAJON CA
2021-12-15 858-844-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H EL CAJON CA
2021-12-14 858-355-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-11-30 858-533-3XXX 3000–3999Assigned FRACTEL, LLC 965H HARBSNALPN CA
2021-11-18 858-330-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-18 858-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-18 858-428-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-18 858-672-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-18 858-834-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RNCHOPNQTS CA
2021-11-17 858-328-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-11-17 858-328-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-11-17 858-328-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-11-17 858-377-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C POWAY CA
2021-11-17 858-377-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C POWAY CA
2021-11-16 858-327-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-327-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-327-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-327-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-327-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-327-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-327-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-355-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-355-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-355-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNDG SNDG CA
2021-11-16 858-422-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CORONADO CA
2021-11-16 858-422-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CORONADO CA
2021-11-16 858-422-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CORONADO 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.