Audio phone number capture, conversion, and use

A portable electronic device is provided. The portable electronic device comprises a processor, a memory, and a capturing application stored in the memory that, when executed on the portable electronic device, monitors a first voice telephone call with a first transmitting device. The portable electronic device also comprises records a telephone number spoken during the first voice telephone call. The portable electronic device also comprises sends a first message to the first transmitting device, the first message containing the telephone number and requesting confirmation of the telephone number. The portable electronic device comprises receives a second message from the first transmitting device, the second message confirming the telephone number.