Look up one own's public IP easily

Occasionally, I need to look up my own public IP for various reasons. To do this, I would google “what is my ip”, and got a result on the browser.

Recently, I found a way to easily do this using curl command to an easy to remember URL ifconfig.io.

Here is an example, of course with the fake IPs as the results:

➜ curl ifconfig.io
2444:3444:20a:5310:d6c9:ffff:fef1:7777

To get the IPv4, we can supply the -4 option to curl command:

➜ curl -4 ifconfig.io
111.77.33.222

Apart from ifconfig.io, there are also a bunch of other URLs which you can curl to, e.g. ipconfig.io. However, for me this, one is enough and easy to remember.