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 740
FRONTIER NORTH, INC. - OH 33
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
2015-08-05 740-589-8XXX 8000–8999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-1XXX 1000–1999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-2XXX 2000–2999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-3XXX 3000–3999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-4XXX 4000–4999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-5XXX 5000–5999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-6XXX 6000–6999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-8XXX 8000–8999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-608-9XXX 9000–9999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-731-0XXX 0000–0999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-731-6XXX 6000–6999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-731-7XXX 7000–7999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-731-8XXX 8000–8999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2015-08-05 740-731-9XXX 9000–9999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2012-08-14 740-731-4XXX 4000–4999Assigned FRONTIER NORTH, INC. - OH 0615 ATHENS OH
2012-08-14 740-991-0XXX 0000–0999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-1XXX 1000–1999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-2XXX 2000–2999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-3XXX 3000–3999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-4XXX 4000–4999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-5XXX 5000–5999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-6XXX 6000–6999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-7XXX 7000–7999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-8XXX 8000–8999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2012-08-14 740-991-9XXX 9000–9999Assigned FRONTIER NORTH, INC. - OH 0615 PORTSMOUTH OH
2008-03-21 740-834-1XXX 1000–1999Assigned FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
2008-03-21 740-834-2XXX 2000–2999Assigned FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
2008-03-21 740-834-3XXX 3000–3999Assigned FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
2008-03-21 740-834-5XXX 5000–5999Assigned FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
2008-03-21 740-834-7XXX 7000–7999Assigned FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
2008-03-21 740-834-8XXX 8000–8999Assigned FRONTIER NORTH, INC. - OH 0615 DELAWARE OH
2005-05-23 740-725-6XXX 6000–6999Assigned FRONTIER NORTH, INC. - OH 0615 MARION OH
2004-06-30 740-435-4XXX 4000–4999Assigned FRONTIER NORTH, INC. - OH 0615 CAMBRIDGE OH

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.