kr.iowatelecom.net has no CNAME records.
Question and response
Question
dig kr.iowatelecom.net. NS
Answer
The response has no answer records.
Authority
iowatelecom.net. 10800 SOA ns5-auth.windstream.net. hostmaster.windstream.net. 2020100649 28800 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0