Area code 248 is found in the US state of Michigan. Primarily servicing the city of Rochester (population: 98670), area code 248 covers 2 counties of Michigan. Located in the Eastern time zone, area code 248 is on the same time as New York, NY. Although the area codes may look domestic, they’re international calls to premium phone numbers, which are like 900 numbers. Victims have been hit with an international call fee, plus an ... International Dialing Codes. Need to make an international phone call and not sure which calling code to use? Our International Dialing Code finder will help you find the calling and area codes for a large selection of countries and cities. 833 Area Code. Did you get a call from 833 area code? Simply enter the phone number in the search box above to find out who called from that number.