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 360
LEVEL 3 COMMUNICATIONS, LLC - WA 183
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
2023-04-07 360-955-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 YELM WA
2022-12-06 360-897-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SO PRAIRIE WA
2022-04-21 360-655-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EATONVILLE WA
2022-02-01 360-222-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SO WHIDBEY WA
2021-03-31 360-360-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2021-03-16 360-370-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SAN JUAN WA
2020-08-13 360-360-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2020-06-04 360-875-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SOUTH BEND WA
2020-05-26 360-541-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2020-01-21 360-641-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ASHFORD WA
2019-12-26 360-946-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2018-11-21 360-762-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2018-11-16 360-228-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BREMERTON WA
2018-05-24 360-839-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2016-12-06 360-994-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 POULSBO WA
2015-11-11 360-395-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MT VERNON WA
2015-11-11 360-999-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OLYMPIA WA
2015-09-22 360-768-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2015-09-22 360-998-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2015-09-17 360-979-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SILVERDALE WA
2015-07-16 360-543-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WHATCOMCTY WA
2015-07-13 360-810-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OLYMPIA WA
2014-04-22 360-267-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GRAYHARBCO WA
2014-03-11 360-368-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WINLOCK WA
2014-03-11 360-940-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 COPALIS WA
2014-03-11 360-973-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 STEVESPASS WA
2013-11-27 360-288-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LKQUINAULT WA
2013-11-26 360-245-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CURTIS WA
2013-11-26 360-276-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PACIFICBCH WA
2013-11-26 360-648-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OCOSTA WA
2013-11-26 360-872-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ORTING WA
2013-11-26 360-964-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MONTESANO WA
2013-11-13 360-295-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VADER WA
2013-10-10 360-824-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BREMERTON WA
2013-10-10 360-846-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2013-04-09 360-488-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MT VERNON WA
2012-11-08 360-386-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MARYSVILLE WA
2012-09-14 360-255-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 WHATCOMCTY WA
2012-09-13 360-346-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ELMA WA
2012-02-01 360-419-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 MT VERNON WA
2012-02-01 360-587-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SKYKOMISH WA
2012-01-04 360-338-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OLYMPIA WA
2011-06-22 360-200-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 LONGVIEW WA
2011-06-03 360-347-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ROCHESTER WA
2011-05-19 360-209-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ABERDEEN WA
2011-05-10 360-529-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OLYMPIA WA
2011-05-10 360-529-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 OLYMPIA WA
2011-05-10 360-975-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2011-05-10 360-975-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VANCOUVER WA
2011-04-07 360-262-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 CHEHALIS WA

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.