A device for coding HF transponders moving along a conveyor device. The device includes a first machining station, arranged and designed to identify a respective HF transponder being guided past the first machining station, and a second machining station with an HF antenna. The HF antenna has a transmission region that is arranged and designed to simultaneously detect a plurality of the HF transponders being guided past the second machining station by the conveyor device. The second machining station is additionally designed to select a respective HF transponder detected in the transmission region of the HF antenna for transmission of data and to transmit data to the selected HF transponder, where the transmitted data is ascertained on the basis of the identification of the selected HF transponder by the first machining station.