Is your ISP taking too much time to resolve DNS (Host Name)? Are you suffering with ISP DNS cache problem? You have to use world most reliable and fast publish DNS Servers and fortunately these are free to use 
I have improved my browsing speed almost 35% by using following DNS providers.
Free Public DNS Servers
- Service Provider: Google
- 8.8.8.8
- 8.8.4.4
- Service Provider: ScrubIt
- 67.138.54.100
- 207.225.209.66
- Service Provider: dnsadvantage
- 156.154.70.1
- 156.154.71.1
- Service Provider: OpenDNS
- 208.67.222.222
- 208.67.220.220
- Service Provider: vnsc-pri.sys.gtei.net
- 4.2.2.1
- 4.2.2.2
- 4.2.2.3
- 4.2.2.4
- 4.2.2.5
- 4.2.2.6
