Check DNS records across global resolvers to see if your changes have propagated
When you update a DNS record — changing your A record to a new server, updating MX records for email, or adding a TXT record — the change has to spread to DNS resolvers around the world. Each resolver caches records for the length of the record's TTL, so the update appears at different times in different places. This is called DNS propagation, and it can take anywhere from a few minutes to 48 hours.
Enter your domain, pick the record type you changed, and check. If all resolvers show your new value, propagation is complete. If some still show the old value, wait for the TTL to expire and check again. Lowering your TTL before making a change makes future updates propagate faster.