The Code of Practice for Determining Employment or Self-employment Status of Individuals (pdf) contains criteria which can be used to clarify whether a person is employed or self-employed. In most cases, it is clear whether a person is an employee or not.
The 708 area code belongs to the state of Illinois (IL) and some of the locations covered are Cicero, Oak Park and more:
408 area code. 07/11/1998: Area code 408 was split. Some of the phone numbers had to be updated to area code 831 on that date. 11/20/2012: Area code 669 was created as an overlay to area code 408. The two area codes serve the same area.08 area code. 07/11/1998: Area code 408 was split. Some of the phone numbers had to be updated to area code 831 on that date. 11/20/2012: Area code 669 was created as an overlay to area code 408. The two area codes serve the same area.