Understanding DNS Propagation Check: Authoritative vs Recursive Resolver Methods
https://serversidenotes.moderncairn.com/posts/understanding-dns-propagation-check-authoritative-vs-recursive-resolver-methods
DNS propagation can be confusing, but knowing the difference between authoritative and recursive resolver methods helps clarify it. Authoritative servers have the final word on a domain's records, while recursive resolvers cache and query these sources for you. When you check propagation, you're essentially seeing if recursive resolvers worldwide have updated from the authoritative source. It's not instant, so patience is key when making DNS changes.