| Code | Name | Region |
|---|---|---|
| DETR2 | Treben | TH |
| DETDM | Trebendorf | SN |
| DETBY | Trebsen | SN |
| DETBR | Trebur | HE |
| DETRH | Trechtingshausen | RP |
| DETFT | Treffurt | TH |
| DE72M | Treia | SH |
| DETKD | Treis-karden | RP |
| DE57K | Tremsbuttel | SH |
| DETRE | Treuchtlingen | BY |
| DETEE | Treuen | SN |
| DETBZ | Treuenbrietzen | BB |
| DETRG | Triberg | BW |
| DEZHV | Tribsees | MV |
| DE2TR | Trieb | SN |
| DETOU | Torgau | SN |
| DETGW | Torgelow | MV |
| DETNH | Tornesch | SH |
| DETO2 | Tornitz | ST |
| DETOS | Tossens | NI |
| DETST | Tostedt | NI |
| DETGP | Tosterglope | NI |
| DETRT | Traben-trarbach | RP |
| DETRB | Trabitz | BY |
| DETTN | Train | BY |
| DETRX | Traisen | RP |
| DE57A | Tralau | SH |
| DE53Y | Tramm | SH |
| DETRM | Trampe | BB |
| DEZAQ | Trappenkamp | SH |
| DETR8 | Trassem | RP |
| DETAF | Traunfeld | BY |
| DETRR | Traunreut | BY |
| DETRA | Traunstein | BY |
| DETWC | Traunwalchen | BY |
| DETDN | Toddin | MV |
| DET9W | Todenbuettel | SH |
| DE69A | Todenbuttel | SH |
| DETDF | Todendorf | SH |
| DETFL | Todesfelde | SH |
| DETDD | Todtenried | BY |
| DETES | Todtenweis | BY |
| DETMO | Todtmoos | BW |
| DETOD | Todtnau | BW |
| DETCH | Toepchin | BE |
| DETGG | Toging | BY |
| DETNG | Toging Am Inn | BY |
| DETLW | Tollwitz | ST |
| DETVT | Tonisvorst | NW |
| DETOE | Tonning | SH |