These are normally assigned by the PPPoE protocol, but if you use a non-standard client, you may need to manually enter these.

Users who have DSL provisioned by Covad should use these:

207.69.188.186
207.69.188.185
207.69.188.187

The DNS servers for Earthlink (there are many others, I believe... someone else add as needed...) are:

207.217.126.81
207.217.120.83
207.217.77.82

NOTE: To manually Opt Out of the redirecting DNS that Earthlink has shoved down our throats forced upon us then use the IPs here:

»EarthLink DSL FAQ »What are the DNS Opt Out Servers for the Redirecting Earthlink DNS Problem?

207.69.188.172 (East Coast)
207.69.188.171 (West Coast)

If you are on the East Coast use it as your Primary DNS entry and use the West Coast as your Secondary DNS entry. If you are on the West Coast use it as your Primary DNS entry and use East Coast as your Secondary DNS entry. It is best to hard code these into your Router only and let the Router give the DNS to your PCs via normal DHCP instead of manually having to hard code multiple PCs. Most Routers have a settings location to place DNS entries.

»EarthLink DSL FAQ »How to Specify DNS Information in the EarthLink UHP ADSL Modem