Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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 571

NUSO, LLC 26

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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2025-06-20	571-632-4XXX	4000–4999	Assigned	NUSO, LLC	732J	MANASSAS	VA
2025-06-20	571-676-7XXX	7000–7999	Assigned	NUSO, LLC	732J	MANASSAS	VA
2023-02-13	571-617-1XXX	1000–1999	Assigned	NUSO, LLC	732J	LEESBURG	VA
2020-10-28	571-479-1XXX	1000–1999	Assigned	NUSO, LLC	478J	LEESBURG	VA
2020-09-08	571-473-1XXX	1000–1999	Assigned	NUSO, LLC	478J	WSNGTNZN08	VA
2018-07-09	571-404-1XXX	1000–1999	Assigned	NUSO, LLC	551G	BRADDOCK	VA
2018-07-02	571-300-8XXX	8000–8999	Assigned	NUSO, LLC	551G	DALE CITY	VA
2018-07-02	571-523-0XXX	0000–0999	Assigned	NUSO, LLC	551G	HERNDON	VA
2018-07-02	571-636-0XXX	0000–0999	Assigned	NUSO, LLC	551G	HAYMARKET	VA
2017-10-16	571-831-8XXX	8000–8999	Assigned	NUSO, LLC	551G	LEESBURG	VA
2017-10-16	571-831-9XXX	9000–9999	Assigned	NUSO, LLC	551G	LEESBURG	VA
2016-09-07	571-260-1XXX	1000–1999	Assigned	NUSO, LLC	551G	DALE CITY	VA
2016-09-07	571-459-1XXX	1000–1999	Assigned	NUSO, LLC	551G	WSNGTNZN19	VA
2016-09-07	571-466-1XXX	1000–1999	Assigned	NUSO, LLC	551G	TRIANGLE	VA
2016-09-07	571-486-8XXX	8000–8999	Assigned	NUSO, LLC	551G	HAYMARKET	VA
2016-09-07	571-525-9XXX	9000–9999	Assigned	NUSO, LLC	551G	HERNDON	VA
2016-09-07	571-549-5XXX	5000–5999	Assigned	NUSO, LLC	551G	BRADDOCK	VA
2016-09-07	571-639-0XXX	0000–0999	Assigned	NUSO, LLC	551G	ARCOLA	VA
2016-08-01	571-775-4XXX	4000–4999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2016-08-01	571-775-6XXX	6000–6999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2016-08-01	571-775-7XXX	7000–7999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2016-08-01	571-800-4XXX	4000–4999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2016-08-01	571-800-5XXX	5000–5999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2016-03-03	571-444-8XXX	8000–8999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2014-01-08	571-458-1XXX	1000–1999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA
2013-05-15	571-699-1XXX	1000–1999	Assigned	NUSO, LLC	551G	WSNGTNZN08	VA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.