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 978
LEVEL 3 COMMUNICATIONS, LLC - MA 166
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
2016-02-02 978-735-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2012-11-28 978-705-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DANVERS MA
2012-02-01 978-965-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LAWRENCE MA
2012-01-18 978-221-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2011-02-18 978-716-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DANVERS MA
2010-12-16 978-319-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2010-10-06 978-965-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LAWRENCE MA
2010-08-06 978-248-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ATHOL MA
2010-02-11 978-248-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ATHOL MA
2008-11-25 978-674-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2008-11-25 978-674-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2008-09-04 978-748-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 TYNGSBORO MA
2008-05-06 978-308-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 W NEWBURY MA
2008-05-05 978-207-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NO READING MA
2008-03-26 978-248-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ATHOL MA
2008-02-04 978-212-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HUDSON MA
2008-02-04 978-212-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HUDSON MA
2008-02-04 978-415-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BERLIN MA
2008-02-04 978-673-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ORANGE MA
2008-02-01 978-237-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LAWRENCE MA
2008-01-29 978-673-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ORANGE MA
2008-01-23 978-965-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LAWRENCE MA
2008-01-21 978-212-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HUDSON MA
2008-01-21 978-490-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WESTFORD MA
2007-12-04 978-633-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ORANGE MA
2006-08-23 978-331-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MAYNARD MA
2006-08-21 978-410-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 GARDNER MA
2006-08-15 978-313-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BILLERICA MA
2006-08-15 978-615-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 AYER MA
2006-06-19 978-633-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ORANGE MA
2006-05-30 978-218-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SUDBURY MA
2006-05-17 978-513-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LOWELL MA
2006-05-16 978-357-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 NO READING MA
2006-05-01 978-309-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ROCKPORT MA
2006-05-01 978-384-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MERRIMAC MA
2006-05-01 978-480-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 TOWNSEND MA
2006-05-01 978-481-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PRINCETON MA
2006-05-01 978-616-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WINCHENDON MA
2006-05-01 978-707-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HARVARD MA
2006-05-01 978-785-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LUNENBURG MA
2006-05-01 978-822-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SHIRLEY MA
2006-05-01 978-913-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ASHBY MA
2006-05-01 978-928-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HUBBARDSTN MA
2006-04-18 978-208-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 LAWRENCE MA
2006-04-18 978-380-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 IPSWICH MA
2006-04-18 978-415-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BERLIN MA
2006-04-18 978-558-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOLTON MA
2006-04-18 978-925-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 PEPPERELL MA
2006-03-31 978-331-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 MAYNARD MA
2006-03-31 978-598-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CLINTON MA

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.