praha.cegra.cz has no CNAME records.
Question and response
Question
dig praha.cegra.cz. NS
Answer
The response has no answer records.
Authority
cegra.cz. 1881 SOA ns.forpsi.net. admin.forpsi.com. 2026021101 14400 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0