Introduction
While migrating DNS hosting to Cloudflare, I noticed that Chunghwa Telecom's DNS servers were not updating. This led me to investigate ways to force DNS propagation. I found that only major international DNS providers offer a manual cache clearing function. The purpose of this post is to document my findings.
DNS-Related Tools
Handy tools for checking successful resolution across global DNS servers and for general testing.
DNSChecker : Link
OpenDNS CacheCheck : Link
DNS Performance Test Tool : Link
Clearing DNS Cache
Google Public DNS - Flush Cache : Link
Purge Cache (Cloudflare) : Link
Chunghwa Telecom 168.95.1.1: You can only wait for 24 hours (Taiwan's ISPs are too behind; most don't support APIs or provide users with faster, more convenient features).
How to Clear the Local DNS Cache on Windows
ipconfig /flushdn
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