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
2023-10-30 858-989-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-30 858-989-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-30 858-989-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-30 858-989-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-30 858-989-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-25 858-978-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 LA JOLLA CA
2023-10-16 858-398-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNDG MRMS CA
2023-10-13 858-389-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2023-10-13 858-389-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2023-10-13 858-389-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2023-10-13 858-389-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CHULAVISTA CA
2023-10-10 858-318-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2023-10-10 858-318-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2023-10-10 858-318-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2023-10-10 858-389-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHULAVISTA CA
2023-10-03 858-310-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2023-10-03 858-318-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CHULAVISTA CA
2023-10-02 858-387-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LA MESA CA
2023-10-01 858-462-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NATIONALCY CA
2023-09-28 858-338-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HARBSNALPN CA
2023-09-28 858-462-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C NATIONALCY CA
2023-09-25 858-723-6XXX 6000–6999Assigned NUSO, LLC 732J LA MESA CA
2023-09-18 858-398-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2023-09-18 858-398-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2023-09-18 858-398-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2023-09-18 858-398-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNDG MRMS CA
2023-09-18 858-585-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA MESA CA
2023-09-18 858-687-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C POWAY CA
2023-09-18 858-723-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LA MESA CA
2023-09-18 858-742-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2023-09-18 858-742-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2023-09-18 858-742-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2023-09-18 858-742-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C SNDG LVTA CA
2023-09-18 858-898-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C CORONADO CA
2023-09-12 858-321-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2023-09-11 858-326-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2023-08-29 858-317-8XXX 8000–8999Assigned TELNYX LLC 073H DULZURA CA
2023-08-24 858-339-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CAJON CA
2023-08-24 858-339-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CAJON CA
2023-08-24 858-339-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CAJON CA
2023-08-22 858-383-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7147 SNDG SNDG 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.