What “propagation” actually is
DNS changes do not travel anywhere. When you edit a record, your DNS host’s authoritative servers start giving out the new value almost immediately. What takes time is every resolver that looked the name up recently: each one keeps the old answer until its TTL runs out, then asks again and gets the new one. “Waiting for propagation” really means waiting for those caches to expire.
That is why the TTL column matters. If a resolver shows the old address with a TTL of 40 minutes, that is roughly how long it will keep serving it. If you plan a change, lower the record’s TTL a day beforehand, so the old value expires quickly when you switch.
How to use the results
- Enter the value you expect after a change — the new IP, mail server or verification string. Each resolver is then marked Updated or Not yet.
- Without an expected value, the tool groups identical answers and flags the resolvers that disagree with the majority.
- Check the SOA serial to see whether a resolver has picked up a new version of the zone at all; it usually increases with every edit.
- Different addresses are not always a problem. Sites behind a CDN or GeoDNS deliberately answer each resolver with a nearby server.
Which resolvers, and why some say “not readable”
The tool uses one endpoint per provider from the same registry that drives the DNS benchmark, preferring each provider’s unfiltered service. Because the queries run in your browser, a resolver can only be shown if it allows web pages to read its answers. Several well-known resolvers do not, and some networks block DNS-over-HTTPS outright. Those rows are labelled rather than hidden, so you can see exactly what was and was not checked. Entries marked endpoint not yet verified are in the registry but have not yet been checked against the provider’s documentation.
Most of these services are anycast: the server that answers is one near you, not near the provider’s headquarters. So this is a view of how the big public resolvers see your domain from your part of the world — the ones most people’s devices actually use — rather than a map of every ISP on the planet.
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Last reviewed 2026-10-02. Results come live from the servers named above; DNS Benchmark Pro does not cache, proxy or store them.