DNS updates can be published quickly, but cached old answers can remain until their TTL/cache periods expire.
Step by Step
- Confirm the new record is saved at the authoritative DNS provider.
- Check the record's TTL.
- Query multiple DNS resolvers or locations if needed.
- Allow old cached responses to expire.
- Verify that you changed the authoritative DNS zone rather than an inactive copy.
If That Doesn't Work
- 'Propagation' is often really caching rather than DNS records physically moving everywhere.
- Changing nameservers can involve additional delegation caching.