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 641
WINDSTREAM IOWA COMMUNICATIONS, INC. 13
WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 8
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 6
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
2021-03-29 641-416-6XXX 6000–6999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PELLA IA
2019-10-21 641-327-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 WELLSBURG IA
2016-09-06 641-307-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GUTHRIECTR IA
2016-07-29 641-432-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 FORESTCITY IA
2015-06-29 641-212-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GREENFIELD IA
2015-06-29 641-557-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWHAMPTON IA
2015-06-29 641-599-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ST ANSGAR IA
2015-06-29 641-659-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 GRINNELL IA
2015-06-29 641-819-9XXX 9000–9999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 FAIRFIELD IA
2015-06-15 641-223-5XXX 5000–5999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 OSCEOLA IA
2012-01-31 641-452-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 UNIONVILLE IA
2012-01-31 641-647-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MYSTIC IA
2012-01-31 641-658-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CINCINNATI IA
2012-01-31 641-724-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MORAVIA IA
2012-01-31 641-726-2XXX 2000–2999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MELROSE IA
2012-01-31 641-766-3XXX 3000–3999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LUCAS IA
2012-01-31 641-898-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 SEYMOUR IA
2012-01-31 641-931-1XXX 1000–1999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 ALBIA IA
2012-01-19 641-841-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWTON IA
2012-01-12 641-217-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CHARITON IA
2012-01-12 641-278-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CRESTON IA
2012-01-12 641-772-2XXX 2000–2999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 TINGLEY IA
2012-01-12 641-783-3XXX 3000–3999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 KELLERTON IA
2012-01-12 641-943-4XXX 4000–4999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 ATTICA IA
2012-01-12 641-946-3XXX 3000–3999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LOVILIA IA
2012-01-12 641-949-2XXX 2000–2999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 TRACY IA
2011-10-04 641-278-8XXX 8000–8999Assigned WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CRESTON IA

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.