This is some kind of aggressive collection agency who called at all illegal hours of the night but never leaves a message. Luckily, ignoring a phone call is not very difficult!
This company calls at all sorts of hours during the day and night, and some days that have called at least 8 times according to my message call center as it gives me the ph# that called,time and date and this # is probably on an automatic dialing system. I also get calls on Saturdays and Sundays. They even called me on Jan 1 2010- they must be below their collection quota. The name appears as IC Solutions. I am reporting them to the local authorities as their calls have now gone beyond the point of harrassment! It's like a new form of phone terrorism!
Yes, it's probably a bill collector. Calls repeatedly, never leaves a message. Caller ID has been changed to only show a phone number. My phone was previously owned by a deadbeat so I get a lot of these.