I have a domain name set with wildcard for all subdomain (*.mydomain.com), I need of exclude a specific subdomain from this condition, I use a record dns for set wildcard and if I set a new record A for a specific subdomain it not work
Normally when you define a wildcard record, it will only match if no other record matches. So if you have
example.com. A 220.127.116.11 *.example.com. A 18.104.22.168 host1.example.com. A 22.214.171.124
A wild card will only be matched if there is no subdomain defined. If you ask host1.example.com. it should return 126.96.36.199 and not 188.8.131.52
If this is the case, it might be that the changes haven't propagated yet. Use the
dig to query your DNS server and some public server (google's is 184.108.40.206).