Since the introduction of Mobile number portability in 2002, the prefix (here 0172) is no longer a indicator for the mobile radio network.
Originally, the phone code 0172 was assigned to Vodafone. Currently, however, this can be used or be active in a different german network.
The same applies to the provider. Originally to Vodafone assigned can this number theoretically be in use at every other german mobile provider.
| 0172 | Phone Code: Classic spelling | 
|---|---|
| +49172 | With german country code +49 | 
| +49(0)172 | With country code +49 and optional 0 | 
| 0049172 | With country code 0049 | 
| (0172) | Telephone code in brackets | 
| 0172- | With hyphen as separator to the phone number | 
| 0172/ | With slash as a separator to the phone number | 
To call a mobile number with the prefix 0172 from abroad, you must dial the area code for Germany (+49 and 0049) at the front. In addition, you have to remove the 0 from mobile phone code. The final phone number then has the following form: +49172...