Why does dns (cname) take so long to update?

Question

Domain Name System

I inserted a cname record (correctly inserted it), the domain was unavailable for 2 days, and remained unavailable (I checked through the services whether the cname record was added or not - it says no). Nameservers change very quickly, within an hour, and this cname moves like a turtle. Cloud domain zone, maybe because of it it takes so long?

Answer 1

First, it is worth checking that the record really exists and is valid. Try knocking with the dig command directly on the server that holds your zone. Something like
dig @zone_DNS_server -t CNAME your_cname
play around with the output of this command, there is a lot of interesting and necessary to understand how DNS works