Approaches for recording and playing back a portion of a telephone call are provided. An approach includes establishing a subscriber of a recording and play back service. The approach includes recording, by a computing device, a portion of a conversation of the subscriber that occurs in a call between a first telephone and a second telephone. The approach additionally includes storing, by the computing device, the portion of the conversation when the call ends. The approach further includes analyzing, by the computing device, the stored portion of the conversation to detect predefined keywords. The approach also includes automatically providing the subscriber with an option to play back the stored portion of the conversation when at least one of the predefined keywords is detected during the analyzing.