What needs to be registered in DNS so that all subdomains address the main domain?

Question

Domain Name System

The task is very simple. It is necessary that all subdomains address the main domain
. I always added an A record *.domain.ru and specified the ip of my server. And everything always worked.
But now I removed a new server and domain, added an A record, configured Apache to accept all subdomains, waited 72 hours and nothing worked.
What could be the problem?
These are the entries

PS And the mail.domain.ru subdomain works as it should

Answer 1

dig +trace IN A blabla.testdomain.ru
will show all problems

Answer 2

drill, dig, nslookup
check what the DNS server will answer you for your arbitrary subdomain