Out of service when i tried to call this number back.

This is a State of Michigan phone number.  They circulate the numbers you see on Caller ID for security reasons so the number you see today might not work tomorrow.

The State of Michigan offices, in Detroit, can be found in "Cadillac Place", the old General Motors building on Grand Blvd.

Just this number

OK, but why is the State of MI calling?

its a bogus line from the michigan attorney general office.. watchout!!!