Incumbent Local Telephone Exchange Area Map
The IUB and the Office of the Chief Information Officer (OCIO) have collaborated to provide an updated map for incumbent local exchange boundaries in Iowa. The IUB's rules at 199 Iowa Administrative Code chapter 22, Regulation of Telecommunications Service, state that service territories are defined by the incumbent local telephone exchange area maps that are on file with the IUB (199 IAC 22.7).
Frequently Asked Questions - Including instructions for downloading a shapefile - updated May 2022
User Guide - updated May 2022
Disclaimer: This electronic map was designed to capture the most up-to-date information available. The map is accurate only to the extent that various sources supplied accurate data. The IUB will continue to update and improve the GIS data and map.