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 601
AT&T ENTERPRISES, LLC 57
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
2024-07-16 601-322-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ROXIE MS
2014-11-05 601-963-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BUCKATUNNA MS
2014-09-11 601-840-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C ENTERPRISE MS
2014-09-11 601-908-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C OBADIAH MS
2014-05-08 601-501-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C VICKSBURG MS
2013-10-30 601-539-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LYNVILLE MS
2013-10-22 601-843-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DUFFEE MS
2013-02-04 601-844-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BRIARWOOD MS
2013-01-24 601-846-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C NVALAIRSTA MS
2013-01-24 601-884-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SHUBUTA MS
2013-01-24 601-935-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HEIDELBERG MS
2012-11-07 601-342-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LAUREL MS
2012-11-07 601-509-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C WAYNESBORO MS
2012-01-10 601-401-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FLORA MS
2012-01-10 601-885-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C UTICA MS
2011-08-17 601-640-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SEMINARY MS
2011-07-08 601-207-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MERIDIAN MS
2011-07-08 601-357-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEWTONHKRY MS
2011-07-08 601-451-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FAYETTE MS
2011-07-08 601-452-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TAYLORSVL MS
2011-07-08 601-557-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C QUITMAN MS
2011-07-08 601-568-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PHILA MS
2011-07-08 601-643-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C WESSON MS
2011-07-08 601-759-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PELAHATCHI MS
2011-07-08 601-806-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MONTICELLO MS
2011-07-08 601-817-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C ELLISVILLE MS
2011-07-08 601-822-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RALEIGH MS
2011-07-08 601-837-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COLLINS MS
2011-07-08 601-851-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TOOMSUBA MS
2011-07-08 601-852-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C EDWARDS MS
2011-07-08 601-864-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MORTON MS
2011-07-08 601-878-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C TERRY MS
2011-07-08 601-912-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RICHTON MS
2011-07-08 601-975-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MIZE MS
2011-06-29 601-336-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C HATTIESBG MS
2011-06-29 601-633-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COLUMBIA MS
2010-12-15 601-308-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CRYSTALSPG MS
2010-12-15 601-448-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PORTGIBSON MS
2010-12-15 601-827-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TYLERTOWN MS
2010-12-14 601-623-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C HAZLEHURST MS
2010-09-23 601-890-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C CENTREVL MS
2010-09-23 601-980-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LIBERTY MS
2010-07-29 601-716-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C WIGGINS MS
2010-07-29 601-791-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LUCEDALE MS
2010-01-08 601-202-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BOLTON MS
2010-01-07 601-439-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MAGEE MS
2009-10-28 601-746-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C POPLARVL MS
2009-09-29 601-265-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C BROOKHAVEN MS
2009-09-29 601-324-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MCCOMB MS
2009-09-29 601-407-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CANTON MS

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.