NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 857
BANDWIDTH.COM CLEC, LLC - MA 1
AHOI LLC 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
2021-06-14 857-392-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D JAMAICA PL MA
2021-06-14 857-392-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D JAMAICA PL MA
2021-06-14 857-392-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D JAMAICA PL MA
2021-06-14 857-422-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2021-06-14 857-422-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2021-06-14 857-422-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2021-06-14 857-422-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2021-06-11 857-365-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BOSTON MA
2021-06-11 857-365-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D BOSTON MA
2021-06-11 857-365-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BOSTON MA
2021-06-11 857-365-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D BOSTON MA
2021-06-11 857-370-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2021-06-11 857-370-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2021-06-11 857-370-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2021-06-11 857-370-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2021-06-11 857-371-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-06-11 857-371-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-06-11 857-371-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-06-11 857-371-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-06-11 857-575-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-06-11 857-575-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-06-11 857-575-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-06-11 857-575-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-06-11 857-578-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D NEWTON MA
2021-06-11 857-578-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D NEWTON MA
2021-06-11 857-578-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D NEWTON MA
2021-06-11 857-578-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D NEWTON MA
2021-06-11 857-597-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D WINTHROP MA
2021-06-11 857-597-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D WINTHROP MA
2021-06-11 857-675-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2021-06-11 857-675-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2021-06-11 857-675-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2021-06-11 857-675-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D ROXBURY MA
2021-06-11 857-678-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-06-11 857-678-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-06-11 857-678-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-06-11 857-678-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-05-18 857-371-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-05-18 857-371-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-05-18 857-371-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-05-18 857-371-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2021-05-18 857-575-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-05-18 857-575-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-05-18 857-575-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-05-18 857-575-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2021-05-18 857-678-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-05-18 857-678-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-05-18 857-678-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-05-18 857-678-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D BELMONT MA
2021-05-18 857-847-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D DORCHESTER MA

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.