The german phone code 06691 represents Schwalmstadt in Hessen.
Schwalmstadt
Different spellings of the Phone Code 06691
06691
(06691)
06691-
06691/
+496691
+49 (6691)
+49-6691
+49 (0) 6691
00496691
0049 (0) 6691
Calling from abroad to Schwalmstadt
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 Schwalmstadt. So you can dial +496691... and add the number of the phone line you want to reach.
Wich place is a "must see" for a tourist in Schwalmstadt?