After about five minutes, she knocked on the window of a 71-year-old neighbour known as Inge T, saying, "I am Natascha Kampusch".
Kampusch spent time with both of them, and had returned to her mother's home from a holiday with Koch the day before her kidnapping.
The 10-year-old Kampusch left her family's residence in Vienna's Donaustadt district on the morning of 2 March 1998, but failed to arrive at school or come home.
She has written a book about her ordeal, 3,096 Days (2010), upon which the 2013 German film, 3096, is based.
Kampusch was raised by her mother, Brigitta Sirny (née Kampusch), and her father, Ludwig Koch, in Vienna, Austria.
Her family included two adult sisters, and five nieces and nephews.
Sirny and Koch separated while Kampusch was still a child and divorced after her abduction.
Later, Kampusch was taken to the police station in the town of Deutsch-Wagram.
Kampusch was identified by a scar on her body, by her passport (which was found in the room where she had been held), and by DNA tests.
Kampusch left the vacuum cleaner running and ran away, unseen by Přiklopil, who, according to the caller, completed the phone call without any sign of being disturbed or distracted.
Kampusch ran for some 200 metres through gardens and a street, jumping fences, and asking passers-by to call the police, but they paid her no attention.
Because Kampusch had carried her passport with her when she left (she had been on a family trip to Hungary a few days before), the police extended the search abroad.