Received a call today from 352.505.1164 with a caller ID name of International Gateway and realized that it was a business associate who uses SIP trunking on their phone system to handle their VoIP traffic. So it appears the callerID is coming from the SIP Trunking provider and not the actual person calling. The person on the other end of the line may very well be a legitimate caller.
Don't know who this is, didn't answer and they didn't leave voicemail. Called twice on 2/11/08. When I called back, the recording said the number is not in service (or something to that extent).
interesting phenomenon: when a friend of mine calls from Orlando, his house phone registers as this number; however, their telephone number is not this number. when I call their regular number, I get them. but if I dial this number that registers as their call, I get a "this line is disconnected" tone set. I'm quite certain that my friends are not making prank calls.