NumberResearch Membership · Data 09/22/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/22/2026

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
GRID 4 COMMUNICATIONS, INC. - MI 36
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
2017-06-29 248-448-9XXX 9000–9999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 SOUTHFIELD MI
2017-06-29 248-861-0XXX 0000–0999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 CLARKSTON MI
2017-06-29 248-951-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROYAL OAK MI
2017-06-29 248-963-9XXX 9000–9999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROCHESTER MI
2017-06-13 248-940-0XXX 0000–0999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 BIRMINGHAM MI
2016-10-10 248-781-9XXX 9000–9999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 TROY MI
2016-10-10 248-847-4XXX 4000–4999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 W BLOOMFLD MI
2016-10-10 248-951-0XXX 0000–0999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROYAL OAK MI
2015-02-27 248-710-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROCHESTER MI
2014-09-08 248-657-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 CLARKSTON MI
2014-09-02 248-598-6XXX 6000–6999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 AUBURN HTS MI
2014-04-09 248-206-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROYAL OAK MI
2014-02-20 248-972-2XXX 2000–2999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 PONTIAC MI
2014-02-19 248-234-9XXX 9000–9999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 SOUTHFIELD MI
2014-02-05 248-385-0XXX 0000–0999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 BIRMINGHAM MI
2012-08-29 248-602-4XXX 4000–4999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 TROY MI
2011-10-04 248-878-2XXX 2000–2999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 TROY MI
2010-12-30 248-731-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 BIRMINGHAM MI
2010-02-12 248-414-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROYAL OAK MI
2006-08-04 248-218-6XXX 6000–6999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROCHESTER MI
2006-08-04 248-243-3XXX 3000–3999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 AUBURN HTS MI
2006-08-04 248-256-8XXX 8000–8999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 OXFORD MI
2006-08-04 248-264-9XXX 9000–9999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 SOUTH LYON MI
2006-08-04 248-283-8XXX 8000–8999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 BIRMINGHAM MI
2006-08-04 248-305-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 NORTHVILLE MI
2006-08-04 248-313-5XXX 5000–5999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 WALLEDLAKE MI
2006-08-04 248-387-6XXX 6000–6999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 COMMERCE MI
2006-08-04 248-394-3XXX 3000–3999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 CLARKSTON MI
2006-08-04 248-419-3XXX 3000–3999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 W BLOOMFLD MI
2006-08-04 248-461-8XXX 8000–8999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DRAYTON PL MI
2006-08-04 248-556-7XXX 7000–7999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 ROYAL OAK MI
2006-08-04 248-579-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 FARMINGTON MI
2006-08-04 248-630-7XXX 7000–7999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 PONTIAC MI
2006-08-04 248-687-7XXX 7000–7999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 TROY MI
2006-08-04 248-690-4XXX 4000–4999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 LAKE ORION MI
2006-05-04 248-595-0XXX 0000–0999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 SOUTHFIELD MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.