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
2021-07-16 858-855-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C EL CAJON CA
2021-07-16 858-855-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C EL CAJON CA
2021-07-16 858-855-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C EL CAJON CA
2021-07-13 858-377-7XXX 7000–7999Assigned FRACTEL, LLC 965H POWAY CA
2021-07-13 858-944-4XXX 4000–4999Assigned FRACTEL, LLC 965H SNDG LVTA CA
2021-07-08 858-477-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
2021-07-08 858-477-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
2021-07-08 858-727-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
2021-07-08 858-727-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
2021-07-08 858-727-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNDG SNDG CA
2021-07-07 858-744-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
2021-07-07 858-867-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNDG SNDG CA
2021-07-06 858-315-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2021-07-06 858-315-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2021-07-06 858-315-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHULAVISTA CA
2021-07-01 858-315-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-315-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-315-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-315-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-315-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-315-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-315-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-07-01 858-316-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CHULAVISTA CA
2021-06-30 858-868-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-06-29 858-868-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-06-29 858-868-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNDG SNDG CA
2021-06-25 858-310-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2021-06-25 858-310-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C RNCHOSANFE CA
2021-06-25 858-365-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2021-06-25 858-428-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2021-06-25 858-434-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RNCHOPNQTS CA
2021-06-25 858-466-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-06-25 858-466-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-06-25 858-466-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-06-25 858-466-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C LA MESA CA
2021-06-25 858-477-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-06-25 858-477-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-06-25 858-477-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-06-25 858-477-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-06-25 858-477-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SNDG SNDG CA
2021-06-25 858-567-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C LA JOLLA 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.