CareSource is a nonprofit that began as a managed health care plan serving Medicaid members in Ohio. Today, it provides public health care programs including Medicaid, Medicare, and Marketplace. The company is headquartered in Dayton, Ohio. It is the largest Medicaid plan in Ohio and second largest in the United States.
The 313 area code is registered in Michigan. 87.57% of phone numbers within the 313 area code are registered as residential/consumer phone numbers, and 12.43% are registered as commercial/business phone numbers.
Area code 639 was put into service on 05/25/13. Area code 639 is an overlay of area code 306.Mandatory 10 digit dialing is required. Ten digit dialing (area code + seven digit number) is necessary in the 306/639 overlay because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.rea Code 639 History: Area code 639 was put into service on 05/25/13. Area code 639 is an overlay of area code 306. Mandatory 10 digit dialing is required.