Unterflurhydranten (13795 insgesamt), Schlüssel 'addr:housenumber'
| Wert | Anzahl |
| 3 | 6 |
| 15 | 4 |
| 6 | 4 |
| 10 | 3 |
| 11 | 3 |
| 12 | 3 |
| 13 | 3 |
| 16 | 3 |
| 4 | 3 |
| 23 | 2 |
| 46 | 2 |
| 26 | 2 |
| 31 | 2 |
| 1 | 2 |
| 2 | 2 |
| 9 | 2 |
| 66 | 1 |
| 12C | 1 |
| 20C | 1 |
| 49 | 1 |
| 28 | 1 |
| 4A | 1 |
| 8F | 1 |
| 71 | 1 |
| 32 | 1 |
| 23A | 1 |
| 14 | 1 |
| 8-9 | 1 |
| 38 | 1 |
| 18 | 1 |
| 5A | 1 |
| 1A | 1 |
| 5 | 1 |
| 16A | 1 |
| 28D | 1 |
| 20 | 1 |
| 64 | 1 |
| 21 | 1 |