This is the primary telephone area code for Dortmund and its surrounding urban districts in North Rhine-Westphalia, Germany.
How to Call Dortmund from Overseas
- Dial your country's exit code (International Access Code)
- Dial 49 (Germany country code)
- Dial the area code (231 - without the leading 0)
- Dial the local phone number
Example: Calling Dortmund from the United States
011 49 231 123456
Where:
011 = USA exit code
49 = Germany country code
231 = Dortmund area code (0231 without the 0)
123456 = Local Dortmund phone number
Quick Facts
Dortmund Area Code Coverage
The 0231 area code covers central Dortmund and key city districts including:
City Center
Innenstadt, Friedensplatz, Brückstraßenviertel
North Dortmund
Eving, Kley, Scharnhorst
South Dortmund
Aplerbeck, Brackel, Holzen
East Dortmund
Hörde, Bövinghausen, Syburg
West Dortmund
Lanstrop, Derne, Marten
Outskirts
Some suburbs like Castrop-Rauxel may use 0231 or other nearby codes (e.g., 02304)
Major Germany Area Codes
Common Exit Codes for Calling Germany
When calling Dortmund from these countries, use these exit codes:
United States
011
Australia
0011
European Union
00
Japan
010
China
00
Canada
011