re need to find out number to a phone line in article bd dea ecs umass edu alee ecs umass edu writes greetings situation i have a phone jack mounted on a wall i don t know the number of the line and i don t want to call up the operator to place a trace on it question is there a certain device out there that i can use to find out the number to the line thanks for any response al there is a number you can call which will return a synthesized voice telling you the number of the line unfortunately for the life of me i can t remember what it is the telephone technicians use it all the time we used to play around with this in our dorm rooms since there were multiple phone lines running between rooms sorry aaron
