Pondus
3
What can people tell from my IP
http://askleo.com/what_can_people_tell_from_my_ip_address/
If you make a point-to-point connection with an instant message program (typically during a file transfer), a peer-to-peer communications program (for example Skype, depending on how the connection is made), then your IP address is also available to the computer with which yours is communicating.
The very nature of how the internet works dictates that when two computers talk to each other, they must know each other’s IP addresses.