For calls to Altdorf (Kreis Böblingen) please enter the dialling code 07031 and then the number of the person or household you want to reach.
| 07031 | Phone Code: Classic spelling |
|---|---|
| +497031 | With german country code +49 |
| +49(0)7031 | With country code +49 and optional 0 |
| 00497031 | With country code 0049 |
| (07031) | Telephone code in brackets |
| 07031- | With hyphen as separator to the phone number |
| 07031/ | With slash as a separator to the phone number |