Im using powerdns in my VPS, yesterday in poweradmin I entered a subdomain to redirect to wordpress. Today, I decided to delete this subdomain, I delete it from poweradmin and its VirtualHost, but this subdomain continue redirecting to my wordpress. I've checked many times virtualhost and all is ok, I executed dig command, and it says this subdomain doesn't exist. I don't know what's happening, if I deleted the subdomain from poweradmin, it oughtn't redirect to wordpress
All DNS servers cache queries. Until the TTL (time to live) of your record expires, some DNS servers will return the address you entered yesterday.