NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
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
2026-09-02 857-355-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2026-08-20 857-412-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2026-08-17 857-363-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2026-08-17 857-431-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2026-08-17 857-431-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2026-07-09 857-579-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2026-05-07 857-288-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2024-10-04 857-605-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2024-10-04 857-605-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2023-05-08 857-858-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NEWTON MA
2022-10-19 857-209-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2022-10-19 857-357-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2022-10-19 857-998-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2022-10-18 857-387-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2022-10-18 857-387-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2022-10-18 857-387-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2022-08-18 857-397-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ROXBURY MA
2022-08-18 857-397-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ROXBURY MA
2022-08-03 857-396-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2022-08-03 857-396-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2022-08-03 857-396-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2022-06-29 857-365-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2022-06-29 857-491-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2021-10-22 857-331-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-10-22 857-357-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-10-22 857-357-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-10-22 857-357-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-09-29 857-331-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2021-09-29 857-357-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2020-12-10 857-837-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2019-06-12 857-322-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2019-06-12 857-728-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2019-05-01 857-322-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2019-05-01 857-773-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E JAMAICA PL MA
2019-02-08 857-341-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2019-02-08 857-341-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2019-02-05 857-299-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2019-02-05 857-299-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2019-02-05 857-299-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2019-02-05 857-299-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2018-12-05 857-663-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2018-09-21 857-349-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WINTHROP MA
2016-08-15 857-410-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2016-08-15 857-410-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2016-06-22 857-760-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WATERTOWN MA
2016-06-17 857-336-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WINTHROP MA
2016-06-13 857-995-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SOMERVILLE MA
2015-12-11 857-990-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2015-12-11 857-990-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2015-12-11 857-990-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.