NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 319
WINDSTREAM IOWA COMMUNICATIONS, INC. 37
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 21
WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-03-08 319-839 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MARENGO IA
2016-07-28 319-299 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 BELLEPLAIN IA
2015-06-25 319-220 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CENTRAL CY IA
2015-06-25 319-245 0XXX2XXX3XXX5XXX7XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GRUNDY CTR IA
2015-06-25 319-344 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 COLUMBSJCT IA
2015-06-25 319-552 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MTPLEASANT IA
2015-06-25 319-722 1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WILLIAMSBG IA
2015-06-25 319-789 0–9 XXXall 10 · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WASHINGTON IA
2015-06-25 319-881 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 WAPELLO IA
2006-07-28 319-884 3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 APLINGTON IA
— 319-224 0XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 TROY MILLS IA
— 319-253 2XXX3XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 HILLSBORO IA
— 319-254 3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 OLDS IA
— 319-257 0XXX2XXX4XXX5XXX8XXX9XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 WINFIELD IA
— 319-258 3XXX5XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 SALEM IA
— 319-345 0XXX5XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 REINBECK IA
— 319-347 4XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 APLINGTON IA
— 319-367 3XXX4XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 NEW LONDON IA
— 319-385 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MTPLEASANT IA
— 319-438 2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CENTRAL CY IA
— 319-444 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 BELLEPLAIN IA
— 319-448 0XXX2XXX3XXX5XXX6XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WALKER IA
— 319-455 6XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 LISBON IA
— 319-456 4XXX5XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 RICHLAND IA
— 319-463 0XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MONTROSE IA
— 319-469 0XXX5XXX6XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 HOUGHTON IA
— 319-474 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 BRANDON IA
— 319-478 0XXX4XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 TRAER IA
— 319-523 7XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 WAPELLO IA
— 319-528 2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 DENMARK IA
— 319-628 0XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 OXFORD IA
— 319-629 2XXX3XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LONE TREE IA
— 319-635 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 FAIRBANK IA
— 319-636 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HAZLETON IA
— 319-642 0XXX4XXX6XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MARENGO IA
— 319-644 4XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 SOLON IA
— 319-645 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 TIFFIN IA
— 319-648 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 RIVERSIDE IA
— 319-653 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WASHINGTON IA
— 319-657 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 AINSWORTH IA
— 319-658 5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CRAWFODSVL IA
— 319-662 0XXX2XXX3XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CONROY IA
— 319-668 0XXX4XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WILLIAMSBG IA
— 319-694 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 BRIGHTON IA
— 319-695 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PACKWOOD IA
— 319-696 4XXX5XXX6XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LOCKRIDGE IA
— 319-698 0XXX3XXX5XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 W CHESTER IA
— 319-723 2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 NICHOLS IA
— 319-725 2XXX3XXX5XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CONESVILLE IA
— 319-726 2XXX6XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LETTS IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.