DNS_PROBE_FINISHED_NXDOMAIN: Fix It Safely
Find the broken DNS layer, follow current fixes for every major device, and verify whether the problem is local or belongs to the domain owner.
Blog category
DNS & Connectivity
DNS turns a site name into an IP address before your browser connects. This category covers resolvers, cache, TTL, provider choices, and errors such as NXDOMAIN. Start with what DNS is and how it works. If one device keeps using an old answer, read how to flush the DNS cache; if the resolver itself is unreliable, continue with how to change your DNS server. TTL tells caches how long an answer may be reused before another lookup.
Use the lookup on this site to see your public IP, but remember that it does not reveal every DNS step. Run the speed test when a site feels slow, then compare the result with the specific name-resolution error you see.
Learn how DNS resolves names, how caches and TTL work, and how to diagnose NXDOMAIN, slow lookups and other common connectivity errors.
How to Change DNS Server on Any Device
Change the resolver on one device, an Android phone, iPhone Wi-Fi network, or whole home router. Follow current menu paths, verify the result, and recover from common failures.
How to Flush DNS Cache on Any Device
Clear stale local DNS answers on every major device, check the browser and router layers, and verify whether a failed lookup is local or upstream.
What Is DNS and How Does It Work?
See how DNS turns a domain into an IP address, why caches and TTLs matter, which records do what, and how to diagnose a failed lookup on your device.
DNS TTL Explained: Caching, Propagation, and Best Values
See how DNS TTL controls cached answers, choose a sensible value, verify the timer on Windows, macOS, Linux, Android, and iPhone, and troubleshoot stale records.