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 989
AT&T ENTERPRISES, LLC 34
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
2023-08-25 989-380-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BAY PORT MI
2023-08-25 989-523-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BAD AXE MI
2016-08-09 989-776-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C SAGINAW MI
2014-02-25 989-726-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WESTBRANCH MI
2013-01-28 989-389-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C ST HELEN MI
2013-01-28 989-394-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C BEAVERTON MI
2013-01-28 989-433-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C ROSEBUSH MI
2013-01-28 989-544-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C FARWELL MI
2012-11-07 989-455-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C VASSAR MI
2012-01-17 989-850-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GAGETOWN MI
2011-09-22 989-314-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C STANDISH MI
2011-09-20 989-214-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C UBLY MI
2011-09-20 989-266-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C AUBURN MI
2011-09-20 989-282-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FAIRGROVE MI
2011-09-20 989-310-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EAST TAWAS MI
2011-09-20 989-349-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BIRCH RUN MI
2011-09-20 989-359-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GLADWIN MI
2011-09-20 989-373-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C OWENDALE MI
2011-09-20 989-418-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CLARE MI
2011-09-20 989-442-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C COLEMAN MI
2011-09-20 989-447-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST CHARLES MI
2011-09-20 989-502-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FRANKENMTH MI
2011-09-20 989-569-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C OSCODA MI
2011-09-20 989-625-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FREELAND MI
2011-09-20 989-630-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C HARRISON MI
2011-09-20 989-660-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MAYVILLE MI
2011-09-20 989-674-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C UNIONVILLE MI
2011-09-20 989-704-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SEBEWAING MI
2011-09-20 989-868-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C REESE MI
2010-12-08 989-564-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LINWOOD MI
2009-12-22 989-575-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C AKRON MI
2006-11-16 989-391-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C BAY CITY MI
2006-01-18 989-750-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MIDLAND MI
2005-04-12 989-327-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C SAGINAW 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.