| Code | Name | Region |
|---|---|---|
| DEUES | Uesen | NI |
| DEUET | Uetersen | SH |
| DEZHX | Uetze | NI |
| DEUFF | Uffenheim | BY |
| DEUAS | Uffing | BY |
| DETTL | Trusetal | TH |
| DETSC | Tschirn | BY |
| DETUE | Tubingen | BW |
| DETUJ | Tuchen | BB |
| DESBV | Tuchenbach | BY |
| DE78H | Tumlingen | BW |
| DETUN | Tuningen | BW |
| DETTH | Tuntenhausen | BY |
| DETKF | Turkenfeld | BY |
| DETUM | Turkheim | BY |
| DETUS | Tussenhausen | BY |
| DETUT | Tuttlingen | BW |
| DETUZ | Tutzing | BY |
| DETWI | Twist | NI |
| DETWT | Twistetal | HE |
| DETWX | Twistringen | NI |
| DEBPA | Ubach-palenberg | NW |
| DEUEN | Uberherrn | SL |
| DEUEB | Uberlingen | BW |
| DEUBR | Ubersee | BY |
| DETFS | Triefenstein | BY |
| DETRI | Trier | RP |
| DETWR | Trierweiler | RP |
| DETIF | Triftern | BY |
| DETRL | Trippstadt | RP |
| DETPT | Triptis | TH |
| DETRU | Trittau | SH |
| DETHE | Trittenheim | RP |
| DETRF | Trochtelfingen | BW |
| DETRC | Trochtelfingen (bopfingen) | BW |
| DETRZ | Troglitz | ST |
| DETGZ | Troglitz | ST |
| DETRO | Troisdorf | NW |
| DETLZ | Trollenhagen | MV |
| DE65M | Trondel | SH |
| DETRN | Trossingen | BW |
| DE8TY | Trostau | BY |
| DETBG | Trostberg | BY |
| DETCL | Truchtlaching | BY |
| DETZZ | Trulben | RP |
| DETH5 | Trautskirchen | BY |
| DETRV | Travemunde | SH |
| DE62U | Travenhorst | SH |
| DE62V | Traventhal | SH |
| DETBN | Trebbin | BB |