The area code (phone code) 0208 is assigned to 2 locations in Germany. Mainly you reach landlines in Oberhausen (Nordrhein-Westfalen).
|0208||Mülheim an der Ruhr|
Note for calls from abroad: In addition to the German country code (+49 or 0049) you can omit the foregoing zero of the dialling code for Oberhausen. So you can dial +49208... and add the number of the phone line you want to reach.