This is the network address of the machine hosting the world. If it cannot be determined, it will be null.
The full network address of the world may be formed by concatenating the world address and port: “byond://[address]:[port]“.
In CGI mode, this is the web address of the world.
This is the local address only. If the world is hosted via a router, the external IP address may be different. Use internet_address to find the external address, if available.