Example methods, apparatus and articles of manufacture to determine authorization levels in a virtual private network are disclosed. A disclosed example method includes determining whether a call originated from an originating station associated with a virtual private network, the call originating via a private branch exchange associated with the virtual private network by a first user of a plurality of users associated with the virtual private network, querying a private-number table based on at least one of a switch identifier representing a service switching point, a trunk group identifier representing the private branch exchange, or an originating station identifier representing the originating station to obtain a private number assigned to the first user, and providing an authorization level associated with the private number to the service switching point, the service switching point to process the call according to the authorization level.