NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 906
LEVEL 3 COMMUNICATIONS, LLC - MI 85
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
2025-05-14 906-390-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ONTONAGON MI
2025-04-11 906-395-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BARAGA MI
2025-04-11 906-441-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUNISING MI
2023-05-18 906-397-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CARNEY MI
2022-11-23 906-201-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 L ANSE MI
2020-11-24 906-767-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRONWOOD MI
2020-02-05 906-738-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 WALLACE MI
2019-06-06 906-398-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ESCANABA MI
2018-11-20 906-477-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ENGADINE MI
2018-11-16 906-875-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CRYSTALFLS MI
2018-11-14 906-345-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIG BAY MI
2018-11-14 906-420-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GLADSTONE MI
2018-11-14 906-542-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHANNING MI
2018-08-29 906-242-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NEGAUNEE MI
2018-08-29 906-748-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SALTSTMARI MI
2018-08-21 906-934-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CALUMET MI
2018-02-07 906-663-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BESSEMER MI
2018-02-06 906-349-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PICKFORD MI
2018-02-06 906-359-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PERKINS MI
2018-02-06 906-376-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 REPUBLIC MI
2018-02-06 906-442-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 RUDYARD MI
2018-02-06 906-474-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 RAPIDRIVER MI
2018-02-05 906-240-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 KINROSS MI
2018-02-05 906-286-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MANISTIQUE MI
2018-02-05 906-296-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LAKELINDEN MI
2018-02-02 906-207-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CEDARVILLE MI
2018-02-02 906-371-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHAMPION MI
2018-02-02 906-384-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CORNELL MI
2018-02-02 906-459-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DE TOUR MI
2018-02-02 906-628-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GARDEN MI
2018-02-02 906-978-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GULLIVER MI
2016-09-14 906-451-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MARQUETTE MI
2016-04-29 906-214-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON RIVER MI
2015-12-02 906-828-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON MT MI
2015-11-12 906-232-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MARQUETTE MI
2015-07-24 906-212-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ESCANABA MI
2014-08-13 906-984-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ST IGNACE MI
2014-04-17 906-451-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MARQUETTE MI
2014-04-17 906-563-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORWAY MI
2013-08-28 906-233-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ESCANABA MI
2013-07-19 906-661-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 AMASA MI
2013-06-24 906-762-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NEWBERRY MI
2013-01-28 906-464-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ISHPEMING MI
2012-03-19 906-239-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON MT MI
2012-01-06 906-214-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON RIVER MI
2011-06-16 906-398-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ESCANABA MI
2010-07-23 906-285-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRONWOOD MI
2007-10-15 906-828-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON MT MI
2007-03-26 906-563-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORWAY MI
2007-03-26 906-661-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 AMASA MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.