If you're trying to figure out what your current public IP address is, there is
a server you can ask. It is a server running at https://ifconfig.me
.
You can visit that URL in your browser to find your IP address and some other
User Agent/Request details. The site also mentions several cURL
commands you
can run to get these details in your terminal.
$ curl ifconfig.me
That will respond with just your public IP address. It is equivalent to curling
ifconfig.me/ip
.
There are other options as well, such as curling for a JSON response of all the data attributes.
$ curl ifconfig.me/all.json
See ifconfig.me for more details.