The german phone code 05603 represents Gudensberg in Hessen.
Gudensberg
Different spellings of the Phone Code 05603
05603
(05603)
05603-
05603/
+495603
+49 (5603)
+49-5603
+49 (0) 5603
00495603
0049 (0) 5603
Calling from abroad to Gudensberg
Note for calls from abroad: In addition to the German country code (+49 or 0049) you can omit the foregoing zero of the dialling code for Gudensberg. So you can dial +495603... and add the number of the phone line you want to reach.
Wich place is a "must see" for a tourist in Gudensberg?