This  post has the list of available servers that  allow you to connect to the particular website.While typing the name of the site the service below translates it to the numerical repersentation that computer  can "understand". Normally we obtain this service automatically through our service providers, however their servers might be very slow or your computer connected to it for to long without renewing  lease of some addresses.

There is a tool called NameBench that will help you locate the fastest DNS server nearby. Please consult me prior to implementing any of the listed services. The increase in speed of the Internet comunnication  veries but mostly is 10%-50%

Free Public DNS Server Service provider: Google

Google public dns server IP address:

8.8.8.8

8.8.4.4

Service provider:Dnsadvantage

Dnsadvantage free dns server list:

156.154.70.1

156.154.71.1

Service provider:OpenDNS

OpenDNS free dns server list / IP address:

208.67.222.222

208.67.220.220

Service provider:Norton

Norton free dns server list / IP address:

198.153.192.1

198.153.194.1

Service provider: GTEI DNS (now Verizon)

Public Name server IP address:

4.2.2.1

4.2.2.2

4.2.2.3

4.2.2.4

4.2.2.54.2.2.6

Service provider: ScrubIt

Public dns server address:

67.138.54.100

207.225.209.66

 DNS servers for Comcast:

75.75.75.75

75.75.76.76