NumberResearch Membership · Data 09/20/2026

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 703
LEVEL 3 COMMUNICATIONS, LLC - VA 176
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
2020-06-02 703-666-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2020-03-11 703-313-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2017-06-27 703-817-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2017-02-01 703-705-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2017-01-13 703-826-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2016-11-15 703-902-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2015-12-09 703-688-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LORTON VA
2014-09-30 703-291-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2014-04-23 703-479-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 MANASSAS VA
2013-09-10 703-260-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLESMTRO VA
2013-08-28 703-940-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2013-07-30 703-687-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LEESBURG VA
2013-07-09 703-665-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2012-06-27 703-775-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LORTONMTRO VA
2012-06-14 703-872-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2012-06-01 703-665-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2012-06-01 703-884-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2012-05-31 703-972-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLESMTRO VA
2012-05-11 703-429-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2012-05-11 703-429-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2012-05-11 703-429-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2012-02-16 703-634-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2012-02-08 703-429-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2012-02-08 703-498-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 OCCOQUAN VA
2012-02-08 703-574-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2012-02-08 703-664-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2012-02-08 703-762-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 VA
2012-02-08 703-982-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LORTON VA
2012-02-01 703-988-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 BRADDOCK VA
2012-01-12 703-594-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 NOKESVILLE VA
2012-01-12 703-872-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN08 VA
2011-12-01 703-291-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2011-12-01 703-665-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2011-09-30 703-594-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 NOKESVILLE VA
2011-08-31 703-436-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LORTON VA
2011-07-11 703-291-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2011-03-15 703-596-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 NOKESVILLE VA
2010-04-15 703-634-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2010-04-07 703-260-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLESMTRO VA
2008-05-28 703-634-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 TRIANGLE VA
2008-03-03 703-436-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 LORTON VA
2008-03-03 703-939-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 HERNDON VA
2008-02-14 703-259-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN19 VA
2008-02-04 703-794-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 INDENDNTHL VA
2008-02-04 703-794-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 INDENDNTHL VA
2008-02-04 703-910-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 OCCOQUAN VA
2008-02-04 703-910-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 OCCOQUAN VA
2008-02-01 703-996-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2008-02-01 703-996-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 DULLES VA
2007-11-27 703-677-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - VA 8825 WSNGTNZN17 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.