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 248
LEVEL 3 COMMUNICATIONS, LLC - MI 160
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
2024-03-27 248-793-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ORTONVILLE MI
2020-06-24 248-582-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2019-12-04 248-654-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2019-11-29 248-873-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FARMINGTON MI
2019-09-11 248-654-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2019-09-06 248-870-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORTHVILLE MI
2019-05-14 248-744-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2019-01-15 248-907-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FARMINGTON MI
2018-11-20 248-965-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2017-05-31 248-329-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MILFDWH LK MI
2017-05-31 248-472-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MILFDWH LK MI
2016-03-09 248-864-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2015-08-13 248-864-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2015-07-07 248-206-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2014-10-07 248-607-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2014-09-30 248-849-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2014-05-28 248-327-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2014-05-21 248-717-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MILFDWH LK MI
2014-02-13 248-206-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2014-02-13 248-213-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2013-12-17 248-939-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FARMINGTON MI
2013-06-26 248-213-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2013-05-03 248-513-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORTHVILLE MI
2013-03-01 248-817-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TROY MI
2013-01-28 248-304-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2013-01-04 248-282-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIRMINGHAM MI
2012-12-14 248-655-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2012-09-27 248-213-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2012-08-22 248-817-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TROY MI
2012-02-01 248-817-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TROY MI
2012-01-31 248-236-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 OXFORD MI
2012-01-30 248-987-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FARMINGTON MI
2011-12-16 248-266-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROCHESTER MI
2011-12-09 248-639-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PONTIAC MI
2011-10-21 248-327-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2011-08-03 248-430-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIRMINGHAM MI
2011-05-11 248-785-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 W BLOOMFLD MI
2011-02-24 248-567-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORTHVILLE MI
2011-02-10 248-430-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIRMINGHAM MI
2011-01-07 248-440-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2010-12-30 248-284-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2010-12-30 248-793-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ORTONVILLE MI
2010-11-24 248-876-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 FARMINGTON MI
2010-11-08 248-825-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TROY MI
2010-10-26 248-266-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROCHESTER MI
2010-10-26 248-494-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PONTIAC MI
2010-10-26 248-716-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 COMMERCE MI
2010-09-15 248-946-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NORTHVILLE MI
2010-09-01 248-716-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 COMMERCE MI
2010-08-03 248-825-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TROY MI

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.