r12.server1.firsthost.lv has no CNAME records.
Question and response
Question
dig r12.server1.firsthost.lv. NS
Answer
The response has no answer records.
Authority
firsthost.lv. 1589 SOA joaquin.ns.cloudflare.com. dns.cloudflare.com. 2396963574 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0