| Code | Name | Region |
|---|---|---|
| DE82Q | Katzwinkel | RP |
| DEKTW | Katzwinkel | RP |
| DEKUB | Kaub | RP |
| DEKLR | Karl | RP |
| DEKQD | Karlsbad | BW |
| DEKSF | Karlsdorf | TH |
| DEKNH | Karlsdorf-neuthard | BW |
| DEKAD | Karlsfeld | BY |
| DEKAH | Karlshuld | BY |
| DEKAK | Karlskron | BY |
| DEKAE | Karlsruhe | BW |
| DEKSD | Karlstadt | BY |
| DEKSN | Karlstein Am Main | BY |
| DEKAR | Karnin | MV |
| DEOLI | Karolinenkoog | SH |
| DEKRF | Karpfham | BY |
| DEK7H | Karsbach | BY |
| DEKSI | Karstadt (prignitz) | BB |
| DEKHU | Karthaus | NW |
| DEYKR | Kartlow | MV |
| DEKZO | Kartzow | BB |
| DEKAQ | Kasel | RP |
| DEKG3 | Kasel-golzig | BB |
| DEKAZ | Kamenz | SN |
| DEKM4 | Kammerstein | BY |
| DEKML | Kammlach | BY |
| DEKPE | Kampe | NI |
| DEKMO | Kampen | SH |
| DEKLF | Kamp-lintfort | NW |
| DEKXD | Kamsdorf | TH |
| DEKNL | Kandel | RP |
| DEKQN | Kandern | BW |
| DEKNI | Kanin | BB |
| DE56O | Kankelau | SH |
| DEKZC | Kanzach | BW |
| DEKNM | Kanzem | RP |
| DEKDW | Kapellen-drusweiler | RP |
| DEKGH | Kappel-grafenhausen | BW |
| DEKAP | Kappeln | SH |
| DEKRK | Kappelrodeck | BW |
| DEKWP | Kappelwindeck | BW |
| DEKH7 | Karbach | BY |
| DEKBN | Karben | HE |
| DEKA4 | Kalbach | HE |
| DEKBA | Kalbach | HE |
| DEKLB | Kalbe (milde) | ST |
| DEKCR | Kalchreuth | BY |
| DEKNK | Kaldenkirchen | NW |
| DEKL4 | Kaldorf | BY |
| DEYRW | Kalefeld | NI |