NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 313
BANDWIDTH.COM CLEC, LLC - MI 382
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
2026-06-05 313-734-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2022-10-17 313-470-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2022-10-17 313-470-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2022-10-17 313-470-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2022-10-17 313-470-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2022-10-14 313-944-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2022-09-19 313-639-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-08-10 313-572-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-08-10 313-572-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-07-01 313-548-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-07-01 313-944-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-04-14 313-644-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-04-14 313-644-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-04-14 313-644-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-04-14 313-644-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-04-14 313-644-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-04-13 313-542-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-04-13 313-542-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-04-07 313-859-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-04-07 313-859-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-03-10 313-536-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2021-03-10 313-536-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2021-02-25 313-591-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-02-25 313-591-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-02-25 313-591-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2021-02-19 313-536-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2021-02-19 313-536-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2021-02-19 313-536-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN4 MI
2021-02-16 313-548-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-02-16 313-548-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-02-16 313-548-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN2 MI
2021-02-11 313-524-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-02-11 313-524-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-02-11 313-524-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2021-01-13 313-489-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-01-13 313-489-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-01-13 313-489-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN5 MI
2021-01-12 313-380-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2021-01-12 313-380-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2021-01-12 313-380-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2021-01-12 313-380-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2021-01-12 313-380-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN6 MI
2020-10-29 313-552-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2020-10-29 313-552-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2020-10-29 313-552-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2020-10-29 313-552-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN1 MI
2020-10-15 313-591-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2020-10-15 313-591-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2020-10-15 313-591-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI
2020-10-09 313-351-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DETROITZN3 MI

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.