From the NannyMUD documentation

LAST CHANGE

2000-12-11

FUNCTION

NAME
        query_ip_number - give the ip number for a player


SYNTAX
	string query_ip_number(void |object player)

DESCRIPTION
	Gives the ip number of an interactive player, ie from which site
	the player is connecting to the game.
	
	The string returned is on the form: "129.16.48.2"


SEE ALSO
        query_ip_name in efun/player_related/query_ip_name
        query_ip_name in sfun/query_ip_name