For calls to Duisburg please enter the dialling code 0203 and then the number of the person or household you want to reach.
|0203||Phone Code: Classic spelling|
|+49203||With german country code +49|
|+49(0)203||With country code +49 and optional 0|
|0049203||With country code 0049|
|(0203)||Telephone code in brackets|
|0203-||With hyphen as separator to the phone number|
|0203/||With slash as a separator to the phone number|