DNS Diagnostics
DNS Speed Test: Find Your Fastest DNS Resolver
Your DNS resolver affects how quickly domain names convert to IP addresses. A slow DNS resolver adds latency to every website you visit. Our DNS speed test benchmarks all major resolvers so you can find the fastest one for your location.
Launch in Mission ControlWhat It Measures
DNS speed test measures the response time (in milliseconds) for each DNS resolver to look up a domain name. It tests Google (8.8.8.8), Cloudflare (1.1.1.1), OpenDNS (208.67.222.222), Quad9 (9.9.9.9), and your ISP's default resolver.
How It Works
- Queries each resolver with multiple DNS lookups
- Measures the full round-trip time for each query
- Averages results across multiple samples to filter outliers
- Ranks resolvers from fastest to slowest and shows the latency difference
Why It Matters
DNS lookups happen before every website connection. A resolver that is 50ms slower adds 50ms to every page load. Switching from a slow ISP DNS to Cloudflare or Google DNS is one of the easiest free performance upgrades for your internet connection.
Understanding Your Results
Under 10ms is excellent DNS response time. 10 to 30ms is good. 30 to 60ms is average. Above 60ms suggests you should switch to a faster resolver. Cloudflare (1.1.1.1) and Google (8.8.8.8) typically achieve under 20ms from most locations.
Ready to test?
Run DNS Speed Test Now →Frequently Asked Questions
Which DNS server is the fastest?
It depends on your location and ISP. Cloudflare (1.1.1.1) and Google (8.8.8.8) are the most consistently fast globally. Run the DNS speed test to find which is fastest from your specific location and network.
How do I change my DNS server?
On Windows, go to Network Settings, select your connection, and change the DNS server addresses. On Mac, go to System Settings, Network, and enter the DNS addresses. On your router, find the DHCP settings to change DNS for all devices on your network.
Does DNS speed affect internet speed?
DNS only affects the initial lookup time, not the actual download speed. But slow DNS adds latency to every new connection. If you visit 50 different domains while browsing, slow DNS can add several seconds to your total browsing time.
Is Cloudflare DNS safe?
Yes, Cloudflare (1.1.1.1) is widely considered safe and privacy-respecting. Cloudflare publishes an annual transparency report and claims not to sell DNS query data. They also support DNS-over-HTTPS (DoH) and DNS-over-TLS (DoT) for encrypted queries.
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