The words incall and outcall describe the location of the encounter. Incall means that the session takes place at the call girl's place (her apartment or hotel room). Outcall means that the session is at a place selected by the customer, personal home or hotel room.

Most escort agencies and independent escorts are now online, and the Internet has become the main venue for a customer to find his match. Generally, a picture of the girl is provided, and sometimes, the type of sexual services she is willing to offer.

The majority of the call girls working through the various escort services on the internet are actually independent escorts as they arrange their own services for the clients and the internet site is merely a "connection point" for the escort and her client.