Amit Kumar, an owner of a call centre, was arrested along with Neha, Kamla, Mamta, Pooja and Poonam, all under-graduate students from Delhi, they said.
During interrogations Amit, a resident of Jaunpur in Uttar Pradesh, said he had employed the girls to collect information by calling people, police said.
The arrests were made on a complaint by Pankaj Kumar, a resident of Chhachhrauli in Uttar Pardesh, at the Gurgaon Police Station, they said.
He in his complaint had mentioned that an unidentified person had fraudulently withdrawn Rs 45,000 from his bank account by using his credit card details, police said.
Pankaj came to know about the online fraud when he received the transaction message on his mobile phone, police said.
A case of cheating had earlier been registered against Amit Kumar in Pune, they added.