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 414
LEVEL 3 COMMUNICATIONS, LLC - WI 82
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
2022-04-01 414-497-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2022-02-24 414-307-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2022-02-24 414-307-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2022-02-14 414-485-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2022-02-14 414-892-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2021-08-24 414-293-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2021-06-29 414-293-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2021-06-08 414-299-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2021-03-23 414-260-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2021-02-23 414-260-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2020-11-04 414-644-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2020-05-28 414-251-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2020-02-19 414-635-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2019-09-11 414-420-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2019-06-25 414-296-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2019-01-08 414-662-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2017-05-31 414-635-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2016-03-29 414-999-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2015-07-28 414-323-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2015-04-23 414-930-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-09-30 414-930-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-09-30 414-930-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-09-30 414-930-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-07-03 414-269-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-07-01 414-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-05-28 414-269-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-05-28 414-269-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-05-14 414-979-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2014-03-27 414-269-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-03-27 414-269-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2014-02-07 414-376-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2013-12-26 414-751-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2013-10-03 414-316-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2013-08-23 414-982-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2012-02-01 414-973-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2011-10-28 414-301-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2011-05-10 414-973-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2010-11-19 414-939-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2010-11-19 414-982-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2010-11-19 414-982-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2010-10-26 414-501-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2010-10-26 414-751-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN4 WI
2010-10-26 414-939-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2010-10-26 414-939-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2010-06-23 414-376-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN5 WI
2010-05-10 414-219-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2010-04-07 414-219-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2009-09-10 414-235-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN3 WI
2009-06-15 414-255-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI
2009-06-15 414-255-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MILWAUKZN1 WI

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.