A method of electronically broadcasting messages to a general or targeted audience. A message sender can post messages on electronic bulletin boards by accessing a website or calling a phone number. The user has control of the design and content of the message including font, background, pictures and sound; there is no need to contact another person or organization such as a radio or TV station to post the message; and the user can target a specific audience if so desired. Messages are posted on user-specified electronic bulletin boards for a certain time slot and can be applied to a variety of services such as highway advertising boards, Amber Alerts, and campus message boards, to name a few.