Wikipedia
WHO-DT
WHO-DT (known on air as WHO-HD) is a television station that broadcasts on Channel 13 in Des Moines, Iowa. It is affiliated with the NBC television network and serves most of central Iowa. The station transmits from the WOI Tower in Alleman, Iowa, which is actually owned by WHO-DT's owners, and its studio facilities are located on Grand Avenue in downtown Des Moines. WHO-DT brands itself as WHO-HD on air, indicating its high definition broadcasts, though the legal call letters are WHO-DT.
WHO-DT was repeated on K27CV channel 27 in Ottumwa and K66AL channel 66 in Clarinda. The Ottumwa translator was operated by a local non-profit organization, and the Clarinda translator was owned by the City of Clarinda.