NumberResearch Membership · Data 09/26/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/26/2026

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 224
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 47
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2015-01-05 224-509-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ALGONQUIN IL
2014-05-07 224-347-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2013-03-28 224-601-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 SKOKIE IL
2012-11-02 224-777-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 HAMPSHIRE IL
2012-10-30 224-310-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2012-10-30 224-310-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2012-09-28 224-324-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2011-12-28 224-205-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2011-12-28 224-205-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2011-12-28 224-205-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2010-10-15 224-202-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2010-10-15 224-202-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2010-10-15 224-323-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2010-10-15 224-387-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2010-10-15 224-587-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2009-11-04 224-338-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ROUND LAKE IL
2009-02-12 224-357-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 CARY IL
2008-11-10 224-725-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DESPLAINES IL
2008-11-10 224-725-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DESPLAINES IL
2007-10-30 224-567-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DESPLAINES IL
2007-10-30 224-567-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DESPLAINES IL
2007-10-25 224-678-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ALGONQUIN IL
2006-06-30 224-222-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELK GROVE IL
2006-06-30 224-222-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELK GROVE IL
2006-06-30 224-222-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELK GROVE IL
2006-06-30 224-222-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELK GROVE IL
2006-06-30 224-222-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELK GROVE IL
2005-10-05 224-238-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELGIN IL
2005-10-03 224-330-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2005-10-03 224-330-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2005-10-03 224-330-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2005-10-03 224-330-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 NORTHBROOK IL
2005-08-01 224-218-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 HAMPSHIRE IL
2005-08-01 224-218-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 HAMPSHIRE IL
2005-08-01 224-345-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2005-08-01 224-345-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2005-08-01 224-345-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2005-07-29 224-333-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ALGONQUIN IL
2005-07-29 224-333-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ALGONQUIN IL
2005-07-27 224-993-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 WAUCONDA IL
2005-07-13 224-612-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DESPLAINES IL
2005-07-13 224-612-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 DESPLAINES IL
2004-09-14 224-402-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ELGIN IL
2004-04-30 224-643-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 LAKE VILLA IL
2004-01-16 224-232-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2004-01-16 224-805-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL
2004-01-16 224-805-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 ARLIGTNHTS IL

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.