A guy rings up a number using all areacodes in America from an 80's song. Interesting in a geeky way.
http://danstheman.com/Jenny.htm
I actually rang the 678 867-5309 number in America (I'm bored!) and got the messages as described on the site, i.e.
Strange but true! x-)Wow, you’ve reached this recording because you’re a loser and have no life. You must be one of the many who has dropped out of school and is living on taxpayer money. Please hang up the phone, get a job, and make a contribution to society. Goodbye!