$ curl ifconfig.me

[root@localhost ~]# curl ifconfig.me

14.23.92.186

 $ curl icanhazip.com

[root@localhost ~]# curl icanhazip.com

14.23.92.186

 $ curl iden

[root@localhost ~]# curl iden

14.23.92.186

 $ curl ipecho.net/plain

[root@localhost ~]# curl ipecho.net/plain

14.23.92.186

 $ curl whatismyip.akamai.com

[root@localhost ~]# curl whatismyip.akamai.com

14.23.92.186

 $ curl tnx.nl/ip

[root@localhost ~]# curl tnx.nl/ip

14.23.92.186

 $ curl myip.dnsomatic.com

[root@localhost ~]# curl myip.dnsomatic.com

14.23.92.186

 $ curl ip.appspot.com

[root@localhost ~]# curl ip.appspot.com

curl: (7) couldn't connect to host

 $ curl -s checkip.dyndns.org | sed 's/.*IP Address: \([0-9\.]*\).*/\1/g'

[root@localhost ~]# curl -s checkip.dyndns.org | sed 's/.*IP Address: \([0-9\.]*\).*/\1/g'

14.23.92.186