"@C60A2AE3.1F2268ED.DC4C44BA.IP" is a hostmask that was cloaked by the network (also called "hostshading"). The "true" hostmask is visible only to 1) ircops 2) yourself, if you whois yourself.
Your network is cloaking your host if you find "x" in your current usermodes. (Some networks use other letters to indicate cloaking, x is the most common one.)
> To see your current usermodes: //echo -a $usermode
If you have an "x" there it's only because you did a whois on yourself that you see the uncloaked host.
> To see what other, regular users will see as your hostmask, do a /who <yournickname> instead of a /whois <yournickname>.
> If the network provides cloaking, it *should* be enabled by default. Try /mode <yournickname> +x none the less.
If the network doesn't provide this cloaking, ask at a help channel whether they provide a vHost service or not; how to get a vHost and how to activate it. A vHost is a virtual- / "fake-" host layer assigned by the IRC network.
If they don't, you may connect to this network indirectly - a bouncer aka BNC is a popular example for a proxy service. If connected via BNC your host will be the host of the BNC provider. You'll find several BNC providers at google.