DNS Speed Test
Each resolver is queried over HTTPS and sees your IP address. The test does not measure the DNS server of your router or provider.
DNS Speed Test
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How this test works
Resolvers: Cloudflare (cloudflare-dns.com), plus Google (dns.google) when you add it, queried over DNS-over-HTTPS from the browser. Lookups: 6 per resolver, TXT record type, 3 s limit each. Each name is random under laboratoru.com, which prevents cache answers; the answer is NXDOMAIN. Lookup 1 includes connection setup.
How to read the result
Columns: first lookup (cold), median of lookups 2 to 6, and the fastest of lookups 2 to 6. Failures are counted per resolver and never recorded as 0 ms. The measurement reflects browser-to-resolver time over HTTPS, not your router's or provider's DNS.
What is typical
The result is a comparison between public resolvers from one location. The first lookup includes connection setup and is reported apart from the warm ones.
What to do if it is bad
Each resolver gets 5 warm lookups after the first one. The test does not measure your current DNS, so it cannot show whether that server is slow.