Abstract: Method and apparatus for an Intelligent Prefix Dialer, eliminating the necessity for manually dialing a local area code as a prefix to a call within the same area code in telephone systems in which such action is a requirement. An Intelligent Prefix Dialer is quiescent and monitors the dialing sequence from the caller's Customer Premise Equipment, CPE, when off-hook condition has been sensed. When the caller wishes to dial seven digits or less of a telephone number, my invention parses a caller defined default prefix, with the abbreviated digits the caller has dialed to form a complete telephone number. The Intelligent Prefix Dialer changes state from quiescent to active and interrupts the call progress to clear the subscriber's telephone line. The Intelligent Prefix Dialer then dials the complete telephone number to successfully complete the call. The Intelligent Prefix Dialer is also user programable to dial Caller ID Blocking or Caller ID Sending * codes, (i.e.