*** URL for checking your public IP ***
1) Check IP address at https://bgp.he.net
2) Check IP address at https://ifconfig.co
3) Check IPv4 and IPv6 address at https://test-ipv6.com
Code Reference :
1) https://stackoverflow.com/questions/9514179/
how-to-find-the-operating-system-version-using-javascript
2) http://net.ipcalf.com