My roommates and I are connected to the internet through a switch. Their computers both have IP addresses that start with 81, according to whatismyip.com. The site says that my IP address starts with 212. My roommate is scaring me, saying that this means my internet usage is being "re-routed" and monitored by someone malicious.
I don't know anything about how networking works and I can't find anything about this online. So could someone please tell me if it's a dangerous sign that my computer has an IP address in a completely different range from the other two computers behind the switch?
Possibly relevant is that the website's lookup service does display the "host name" as my broadband company. Sorry if I'm not providing the necessary information but I have no clue how all this works.