| Code | Name | Region |
|---|---|---|
| DEKEN | Kempten | BY |
| DEKPP | Kempten | RP |
| DENNP | Kenn | RP |
| DEKZI | Kenzingen | BW |
| DERKE | Kerken | NW |
| DEKKG | Kerkingen | BW |
| DEKNE | Kernen | BW |
| DEKRP | Kerpen | NW |
| DEKER | Kerpen | RP |
| DEKB2 | Kerpen-buir | NW |
| DE84J | Kerpen-turnich | NW |
| DEKES | Kesselsdorf | SN |
| DEKLS | Kesselstadt | HE |
| DEKAU | Kaufbeuren | BY |
| DEKAF | Kaufbeuren-neugablonz | |
| DEKAG | Kaufering | BY |
| DEKUU | Kaufungen | HE |
| DEKVF | Kavelstorf | MV |
| DE59C | Kayhude | SH |
| DEKEF | Kefenrod | HE |
| DEKEH | Kehl | BW |
| DEKHT | Kehnert | ST |
| DE82X | Kehrig | RP |
| DEKEI | Keitum | SH |
| DEKEG | Kelberg | RP |
| DEK77 | Kelbra | TH |
| DEKEM | Kelheim | BY |
| DEKHM | Kelkheim | HE |
| DEKLL | Kell | RP |
| DEKAC | Kell Am See | RP |
| DE63V | Kellenhusen | SH |
| DEKHN | Kellinghusen | SH |
| DEKEZ | Kellmunz | BY |
| DEZKF | Kasendorf | BY |
| DE56P | Kasseburg | SH |
| DE64M | Kasseedorf | SH |
| DEKAS | Kassel | HE |
| DE5KA | Kastel | HE |
| DEKSA | Kastellaun | RP |
| DEAST | Kastl | BY |
| DEKAT | Kastl | BY |
| DE53C | Kastorf | SH |
| DEKSR | Kastorf | NI |
| DEKBD | Katlenburg-duhm | NI |
| DEKYL | Katlenburg-lindau | NI |
| DE59M | Kattendorf | SH |
| DEKTT | Katterbach | BY |
| DEKTR | Katzenbach | RP |
| DE83K | Katzenelnbogen | RP |
| DETZU | Katzhutte | TH |