These jokers can spoof your caller ID. They can make it display any number, functional or not. If they wanted to they could send 123-456-7890.
If you don't know the number. Let voicemail catch it. You can always call back if the call is/was legit..
Got a call from thios number on my work phone, disconnected when i answered....then, within seconds, my cell phone rang - from same number...I did NOT answer. Weird.
Got a call from this number mid-morning. Another listing to add to my "Village Idiots" contact list with dozens of blocked numbers.
FYI...if you ever call these cretins back, you're asking for trouble. Chances are that will show your number as a active and free game for prey.