| Code | Name | Region |
|---|---|---|
| DEZDP | Odelzhausen | BY |
| DEODE | Odenthal | NW |
| DEODZ | Odenwald | BW |
| DEORG | Oderberg | BB |
| DEOD4 | Oderding | BY |
| DER6T | Oberstaufenbach | RP |
| DEOBF | Oberstdorf | BY |
| DEOFD | Oberstenfeld | BW |
| DEXHH | Oberstetten | BW |
| DEOB2 | Obersuhl | HE |
| DEOSM | Obersulm | BW |
| DEOEZ | Obersulzen | RP |
| DEZBX | Obertaufkirchen | BY |
| DEOEU | Oberteuringen | BW |
| DEDEO | Oberthal | SL |
| DEOHB | Oberthulba | BY |
| DEOBT | Obertraubling | BY |
| DEOBN | Obertshausen | HE |
| DE82E | Oberuhldingen | BW |
| DEOBL | Oberursel | HE |
| DEOBV | Oberviechtach | BY |
| DEOG3 | Oberwangen | BW |
| DEZDY | Oberwerrn | BY |
| DEOEE | Oberwesel | RP |
| DEOBW | Oberweser | HE |
| DEOBP | Oberpfaffenhofen | BY |
| DENFO | Oberpframmern | BY |
| DEOB3 | Oberreichenbach | BW |
| DEOR3 | Oberreidenbach | RP |
| DE77F | Oberreute | BW |
| DEORU | Oberreute | BY |
| DEOXG | Oberriexingen | BW |
| DEORX | Oberroblingen | ST |
| DEO9B | Oberrossbach | RP |
| DEOOT | Oberrot | BW |
| DEVO2 | Oberrotweil (vogtsburg/kaiserstuhl) | BW |
| DEOEC | Oberscheinfeld | BY |
| DEOBS | Oberschleissheim | BY |
| DEXOS | Oberschneiding | BY |
| DEOSO | Oberschona | SN |
| DEOGG | Oberschonegg | BY |
| DESCY | Oberseifersdorf | SN |
| DEOQG | Obersochering | BY |
| DEOZH | Obersontheim | BW |
| DEZO2 | Oberstaufen | BY |
| DEOMH | Obermarschacht | NI |
| DEOGL | Obermassfeld-grimmenthal | TH |
| DEOML | Obermehler | TH |
| DEOMN | Obermeitingen | BY |
| DEOBM | Obermichelbach | BY |