The area code (phone code) 05121 is assigned to 3 locations in Germany. Mainly you reach landlines in Hildesheim (Niedersachsen).
| Dialling Code | City |
|---|---|
| 05121 | Hildesheim |
| 05121 | Giesen bei Hildesheim |
| 05121 | Diekholzen |
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 Hildesheim. So you can dial +495121... and add the number of the phone line you want to reach.