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
AT&T ENTERPRISES, LLC 42
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2023-08-29 906-300-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C REPUBLIC MI
2023-08-29 906-306-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C PERKINS MI
2023-08-29 906-316-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ENGADINE MI
2023-08-25 906-277-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C CHANNING MI
2023-08-25 906-301-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MICHIGAMME MI
2023-08-25 906-309-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HERMANSVL MI
2023-08-25 906-331-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C KEWEENAW MI
2023-08-25 906-339-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHAMPION MI
2023-08-25 906-384-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C CORNELL MI
2023-08-25 906-444-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ROCK MI
2023-08-25 906-466-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BARK RIVER MI
2023-08-25 906-575-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BERGLAND MI
2023-08-25 906-822-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C AMASA MI
2015-04-15 906-847-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C MACKINACIS MI
2014-02-24 906-214-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C IRON RIVER MI
2013-12-11 906-345-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C BIG BAY MI
2013-12-11 906-569-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TROUT LAKE MI
2013-10-10 906-242-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEGAUNEE MI
2013-10-10 906-970-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NORWAY MI
2013-02-01 906-275-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HOUGHTON MI
2013-01-28 906-372-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C GWINN MI
2013-01-25 906-358-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WATERSMEET MI
2013-01-25 906-474-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C RAPIDRIVER MI
2013-01-25 906-667-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BESSEMER MI
2012-11-27 906-229-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WAKEFIELD MI
2012-11-27 906-259-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SALTSTMARI MI
2012-11-27 906-264-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARQUETTE MI
2012-11-27 906-285-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C IRONWOOD MI
2012-11-27 906-296-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKELINDEN MI
2012-11-27 906-448-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C IRON MT MI
2012-11-27 906-702-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ISHPEMING MI
2012-11-27 906-792-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C MENOMINEE MI
2012-11-27 906-825-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C GLADSTONE MI
2012-03-06 906-291-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEWBERRY MI
2012-03-06 906-292-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BREVORT MI
2012-03-06 906-298-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST IGNACE MI
2012-03-06 906-398-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ESCANABA MI
2012-03-06 906-586-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C CURTIS MI
2012-03-06 906-826-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C STEPHENSON MI
2012-03-06 906-875-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CRYSTALFLS MI
2012-03-06 906-934-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CALUMET MI
2012-01-25 906-330-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C POWERS 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.