1010 AM KRNI Mason City IA

KRNI (1010 AM) is a non-commercial, listener-supported public radio station licensed to Mason City, Iowa, and serving Northern Iowa. It is owned by Iowa Public Radio, Inc., and carries the network's "News and Information" service, along with flagship station WOI 640 Ames and WSUI 910 Iowa City. KRNI is a member station of National Public Radio (NPR) and also carries programs from the Public Radio Exchange (PRX) and American Public Media (APM). The BBC World Service is heard overnight.

By day, KRNI is powered at 760 watts. But it reduces power to 16 watts at night. It broadcasts from a single tower with a non-directional signal. The transmitter is east of Mason City. Even with its modest power, the region's flat land and near-perfect ground conductivity allow KRNI to provide at least secondary coverage to most of north-central Iowa and parts of southern Minnesota in the daytime. At night, it must protect from interference two Canadian Class A stations on 1010 AM, CFRB in Toronto and CBR in Calgary, rendering KRNI's 16 watts all but unlistenable, even in Mason City.