In order to activate a public fixed IP address, I need to provide the source public IP address. What is it?

In order to activate a public fixed IP address, it is necessary to provide the source public IP address of the device or web server that connects with the device in which a SIM card has been inserted.

Important: the IP addresses in the following ranges are private rather than public:
• 10.0.0.0 - 10.255.255.255
• 172.16.0.0 - 172.31.255.255
• 192.168.0.0 - 192.168.255.255
IP addresses with a form such as “5.x.x.x” are not correct if detected by the device in which a Things Mobile SIM card has been inserted.