NumberResearch Membership · Data 09/21/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 641
WINDSTREAM IOWA COMMUNICATIONS, INC. 60
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 32
WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 28
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 641-582 0XXX6XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 FORESTCITY IA
— 641-620 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PELLA IA
— 641-621 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PELLA IA
— 641-622 4XXX6XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 SIGOURNEY IA
— 641-624 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 DELTA IA
— 641-625 2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PEORIA IA
— 641-626 2XXX6XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LEIGHTON IA
— 641-627 2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 OTLEY IA
— 641-628 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PELLA IA
— 641-634 7XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WHAT CHEER IA
— 641-635 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HARPER IA
— 641-636 4XXX5XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 KEOTA IA
— 641-637 3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEW SHARON IA
— 641-647 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MYSTIC IA
— 641-649 3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PLANO IA
— 641-652 0XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 ELDON IA
— 641-653 0XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 HEDRICK IA
— 641-655 2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 FARSON IA
— 641-656 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MILTON IA
— 641-658 3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CINCINNATI IA
— 641-661 3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MARTINSBG IA
— 641-667 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 OLLIE IA
— 641-693 0XXX5XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LIBERTYVL IA
— 641-724 2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MORAVIA IA
— 641-726 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MELROSE IA
— 641-728 2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PERU IA
— 641-734 2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 DIAGONAL IA
— 641-736 3XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ST ANSGAR IA
— 641-737 0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 STACYVILLE IA
— 641-742 2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 ADAIR IA
— 641-743 4XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GREENFIELD IA
— 641-744 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 LINDEN IA
— 641-745 9XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 FONTANELLE IA
— 641-747 4XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GUTHRIECTR IA
— 641-764 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MARTENSDL IA
— 641-766 2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LUCAS IA
— 641-767 2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 REDDING IA
— 641-768 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MACKSBURG IA
— 641-772 2XXX5XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 TINGLEY IA
— 641-774 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CHARITON IA
— 641-782 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CRESTON IA
— 641-783 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 KELLERTON IA
— 641-785 3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 BENTON IA
— 641-787 7XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWTON IA
— 641-791 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWTON IA
— 641-792 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWTON IA
— 641-823 2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GREENE IA
— 641-828 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 KNOXVILLE IA
— 641-841 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 NEWTON IA
— 641-842 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 KNOXVILLE IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.