Every website you visit starts with a DNS lookup - your device asks a server "what is the IP address of velocityverify.com?" and then connects. That lookup takes between 5 and 200 milliseconds depending on which DNS server you use. Your ISP assigns you a DNS server by default. That server is almost never the fastest one available, and it may log every domain you visit. Switching DNS takes about 90 seconds and can make every page feel noticeably snappier.
The quick answer
Your ISP's default DNS server is usually slower and less private than alternatives like Cloudflare (1.1.1.1) or Google (8.8.8.8). The fastest DNS server for your specific location depends on your geography and ISP routing - run a DNS benchmark test to find out which one is actually fastest for you, not just which one scores best in global averages.
Popular DNS servers compared
| DNS Provider | Primary IP | Avg Global Latency | Privacy | Best For |
|---|---|---|---|---|
| Cloudflare | 1.1.1.1 | ~11ms | Strong - no query logging | Speed + privacy balance |
| 8.8.8.8 | ~20ms | Moderate - logs queries | Reliability, wide CDN benefit | |
| Quad9 | 9.9.9.9 | ~25ms | Strong + malware filtering | Security-focused networks |
| OpenDNS | 208.67.222.222 | ~30ms | Moderate | Family filtering options |
| ISP Default | Varies | 50-200ms typical | Often logged and sold | Nothing - replace it |
How to run a real DNS speed test
Global averages are misleading because DNS latency depends heavily on where the nearest Points of Presence are from your location. The most accurate test is one you run yourself from your network.
Windows - command line test
Open PowerShell and run the following for each DNS server you want to benchmark:
Measure-Command { Resolve-DnsName google.com -Server 1.1.1.1 }Measure-Command { Resolve-DnsName google.com -Server 8.8.8.8 }Measure-Command { Resolve-DnsName google.com -Server 9.9.9.9 }
Run each five times and average the milliseconds in the output. The lowest consistent average wins for your network.
Use DNS Benchmark (Windows)
Gibson Research Corporation's DNS Benchmark utility tests over 5,000 DNS resolvers and ranks them by response time from your specific location. It is free, runs without installation, and gives you a definitive ranked list in about 60 seconds of automated testing.
How to change your DNS server
Once you know the fastest DNS for your network, change it at the router level rather than per-device. This applies the faster DNS to every device on your network automatically, including phones and smart TVs.
In most router interfaces, look for WAN Settings or DHCP Settings and replace the DNS fields with your chosen primary and secondary IPs. For Cloudflare, that is 1.1.1.1 and 1.0.0.1. Apply and reboot. Every device on your network now routes DNS through the faster resolver.
What DNS speed affects in practice
DNS lookup time adds directly to page load time on first visits to any domain - your browser has to resolve the address before it can connect. Cached lookups are near-instant, but the first load and any uncached domain suffers the full penalty. On a network with 200ms ISP DNS, every cold page load wastes two-tenths of a second just on name resolution. Multiply that across dozens of page loads per hour and it adds up. Switching to a 10ms DNS resolver effectively makes your internet feel faster for browsing even with identical raw speeds on your speed test.
Combined with a good bufferbloat fix and an Ethernet connection, DNS optimization is one of the cheapest and most impactful changes you can make to perceived network performance.