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Comment by yakubin | Hacker News Reader

There was a thread[1] a couple months ago where I discovered a method to get one's IP address relying only on DNS:

  nslookup myip.opendns.com resolver1.opendns.com

I love it.

That will return an IPv6 address, if you have IPv6 connectivity. That's normally be fine, but for occasions it isn't there is

    dig +short -4 myip.opendns.com a @resolver1.opendns.com

This command just returns the IP:

dig +short @resolver2.opendns.com myip.opendns.com