How DNS Propagation Checks Differ Between Authoritative and Recursive Resolvers

https://magic-wiki.win/index.php/How_DNS_Propagation_Checks_Differ_Between_Authoritative_and_Recursive_Resolvers

When you check DNS propagation, an authoritative resolver (like your hosting provider's) already knows the records it holds and sees changes instantly; but a recursive resolver—like your ISP or Google's public DNS—only updates after its cache expires. So propagation delays are really about waiting for the recursive resolvers to purge old data and fetch the new version from the authoritative source.