NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 740
LEVEL 3 TELECOM OF OHIO, LLC - OH 25
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
2015-07-09 740-953-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2014-09-17 740-951-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 PATASKALA OH
2014-09-17 740-951-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 PATASKALA OH
2014-09-17 740-951-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 PATASKALA OH
2014-08-15 740-785-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 LANCASTER OH
2014-03-27 740-920-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 GRANVILLE OH
2013-05-03 740-618-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 NEWARK OH
2010-05-04 740-239-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 WSNGTNCTHS OH
2009-09-24 740-203-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DELAWARE OH
2008-10-10 740-615-0XXX 0000–0999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-10-10 740-615-9XXX 9000–9999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2008-05-01 740-919-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 PATASKALA OH
2008-04-15 740-938-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 RATHBONE OH
2007-05-11 740-490-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 LONDON OH
2006-11-01 740-203-1XXX 1000–1999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DELAWARE OH
2006-01-19 740-201-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 CHESHIRCTR OH
2005-08-11 740-203-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF OHIO, LLC - OH 7460 DELAWARE OH

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.