u112-106.static.grape.cz has no CNAME records.
Question and response
Question
dig u112-106.static.grape.cz. NS
Answer
The response has no answer records.
Authority
grape.cz. 900 SOA ns1.grapesc.cz. domeny.grapesc.cz. 202505240 3600 900 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0