NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 443
BANDWIDTH.COM CLEC, LLC - MD 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
2026-09-03 443-657-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F RANDALLSTN MD
2024-10-15 443-312-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRYNPKLNCM MD
2024-10-15 443-405-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F RANDALLSTN MD
2024-10-04 443-549-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DUNDALK MD
2024-09-26 443-973-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ELLICOTTCY MD
2022-10-25 443-577-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F GLENBURNIE MD
2022-10-14 443-333-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2022-10-14 443-699-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2022-10-14 443-714-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2022-08-22 443-305-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ARGRGBSNIS MD
2022-01-26 443-483-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CARDIFF MD
2021-11-05 443-645-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F MILLERSVL MD
2021-08-03 443-332-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CROFTON MD
2021-08-03 443-332-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CROFTON MD
2021-02-23 443-294-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WEST RIVER MD
2020-12-22 443-228-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CHASE MD
2020-12-22 443-616-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BEL AIR MD
2020-12-10 443-265-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F FORK MD
2020-11-02 443-490-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F EDGEWOOD MD
2020-11-02 443-673-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BRYNPKLNCM MD
2020-10-30 443-332-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CROFTON MD
2020-09-01 443-318-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COCKEYSVL MD
2020-09-01 443-595-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SPARKSGLNC MD
2020-08-13 443-332-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CROFTON MD
2020-08-13 443-495-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2020-08-13 443-940-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PIKESVILLE MD
2020-08-05 443-318-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COCKEYSVL MD
2020-07-14 443-319-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COLUMBIA MD
2020-07-14 443-716-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2020-06-04 443-884-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-06-04 443-884-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-06-04 443-884-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-06-04 443-884-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE MD
2020-06-03 443-662-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SPARKSGLNC MD
2019-05-09 443-338-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SPARKSGLNC MD
2019-05-03 443-526-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F HAVREGRACE MD
2019-05-01 443-952-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F WESTMINSTR MD
2019-03-28 443-774-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COLUMBIA MD
2019-03-28 443-774-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COLUMBIA MD
2019-03-21 443-781-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ARGRGBSNIS MD
2019-03-20 443-833-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ARBUTUS MD
2019-03-01 443-788-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ABERDEEN MD
2019-02-14 443-376-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DUNDALK MD
2019-02-14 443-407-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DUNDALK MD
2019-02-14 443-879-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F DUNDALK MD
2019-02-07 443-383-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SILVER RUN MD
2019-02-07 443-383-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SILVER RUN MD
2019-02-07 443-383-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SILVER RUN MD
2019-02-07 443-383-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SILVER RUN MD
2019-02-07 443-383-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SILVER RUN MD

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.