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:
AreaCode.org is an area code finder with detailed information on the 818 area code including 818 area code map. Major cities like Agoura Hills within area code 818 are also listed on this page. More area codes, including those outside of California, are found on the AreaCode.org homepage.18 Area Code 818. At AreaCode.org, you'll find helpful information on the 818 area code, including 818 area code location. Other phone area codes may be found using AreaCode.org's area code locator.