Alright, heres a fun story..
For the past few hours I have been receiving calls from a Pittsburgh area code.. The calls have sounded like "Hello, hello?" and "Anyone there?" and even on occasion some have said my last name "Hello, can I speak with Mr. or Mrs. Smith?" - Keep in mind this was on my answering machine..
They have been caling since about 4:00PM, so at around 7 I decided to do some research, turns out the calls have been getting everyone:
http://800notes.com/Area-Code.aspx/1-412Take a gander at that page, as you can see this is a pretty annoying thing! Has anyone else seen this / had this happen to them?