Getting the public IP of a FIOS router

I'm new to FIOS. So far it's working well. Since I run an FTP server, I need to know the public IP address of my router. It's cumbersome to HTTP to the modem, give a password, and read the IP from the screen. Google turned up this command (with output).
v:\> nslookup -type=a

Non-authoritative answer:
Using "2>NUL" to get rid of "Non-authoritative answer:" and wrapping it up in a couple TCC functions, I now have this.

v:\> echo %@word[1,%@execstr[4,nslookup -type=a 2>nul]]
I suppose I'll further wrap that up into an alias or a user-defined function.

I'd love to see other solutions.
Likes: Bob Chapman
I think it works like this. Both NSLOOKUP and DIG are told to use the DNS server And that seems to be a real DNS server.
v:\> dig +short
That's correct, though I don't know why my former employer hasn't removed that record; it's almost a year out of date.

What's special is the name "". When that name is queried, returns the IP from which the query came. It's so simple that I wonder why such a mechanism isn't universally implemented by DNS servers.