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 216
LEVEL 3 COMMUNICATIONS, LLC - OH 92
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
2021-02-05 216-946-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2020-05-26 216-238-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2019-08-02 216-297-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2019-01-23 216-243-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2017-02-17 216-760-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2017-01-31 216-954-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2016-01-22 216-727-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2016-01-22 216-727-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2016-01-22 216-727-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-11-24 216-666-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-07-30 216-356-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-07-30 216-356-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-06-17 216-350-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-06-17 216-350-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-05-12 216-553-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-04-23 216-553-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-03-10 216-453-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-03-10 216-523-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2015-02-18 216-413-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2014-10-24 216-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2014-10-01 216-600-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2014-05-23 216-302-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2014-05-23 216-302-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2014-01-15 216-487-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
2013-11-26 216-303-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2013-11-26 216-303-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2013-11-07 216-242-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2013-09-10 216-609-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2013-05-03 216-342-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TERRACE OH
2013-04-12 216-503-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
2013-03-22 216-777-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2013-01-03 216-777-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2012-02-13 216-285-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TERRACE OH
2012-02-01 216-438-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONTRSE OH
2011-07-20 216-342-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TERRACE OH
2011-07-20 216-503-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
2011-05-12 216-220-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 MONTRSE OH
2011-04-05 216-313-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2011-04-05 216-592-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2011-03-04 216-672-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2011-01-10 216-503-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
2010-12-30 216-342-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 TERRACE OH
2010-11-17 216-485-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2010-11-17 216-586-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2010-11-17 216-586-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2010-10-26 216-404-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2010-10-26 216-404-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2010-10-26 216-503-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 INDEPNDNCE OH
2010-08-03 216-367-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND OH
2010-05-20 216-672-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - OH 4863 CLEVELAND 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.