220.127.116.11 - 18.104.22.168
Haven't seen them do an independent crawl (yet) but their users can host audio files, not necessarily their own. The upload hits the owner's server, in this case mine. Don't know who it was attempting to rip my audio files, but their broadband IP address is now blocked, along with Soundcloud. Upon request, Soundcloud removed my property quickly without hassle.