The german phone code 038331 represents Süderholz, Vorpommern in Mecklenburg-Vorpommern.
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 Süderholz, Vorpommern. So you can dial +4938331... and add the number of the phone line you want to reach.