V13, New Star Broadcasting (新星廣播電臺 Xinxing Guangbo Diantai) is a Taiwanese number station.

Format

V13 broadcasts typically consist of a series of three messages, each one assigned to a different group or "unit" of agents. Messages are usually between 30 and 35 paired four digit groups. The following is a rundown of each broadcast:

There is also a very rare null format:

"這裡是新星廣播電臺，第三臺。在這時間裡沒有電報給您。謝謝您的收聽，祝您健康快樂，再會。" This is the New Star Broadcasting Station, station 3. At this time, there are no messages for you. Thank you for listening, wishing you health and happiness. See you."

Operation 

V13 operates five numbered programs (#1, #2, #3, #4, #5), each targeting a different part of East Asia. Each program is assigned a different number of time slots, with stations 1, 3, and 4 getting six slots, station 2 getting four slots, and station 5 getting two slots each day. Transmissions begin on the hour and repeat on the half hour before changing frequencies. The broadcasts are irregular, although they are often daily. Standard format messages repeat for a week before being swapped out for new ones at midnight GMT on Sundays.

V13a

V13a is a variant of V13 that transmits in AM mode instead of USB and carrier, used for testing and training purposes. All messages begin with "0313", likely as a flag for a training message or to indicate the broadcast is a test, and messages are often recycled or repeated. Group counts ending in zero are spoken oddly, as er shi ling, san shi ling, si shi ling, etc: literally "twenty zero", "thirty zero", and "forty zero". The speech rhythm is also notably different from the standard format, with the introductory phrase spoken only once, the 20 group seperator recited more slowly, and the four digit groups spoken closer together. A faint hum or buzz can often be heard between each number group, likely indicating the use of an older digital voice generator. It activates for months at a time, then goes silent, then appears again sporadically months later.

V13a transmissions have highly varied numbers of units and group counts and each transmission has a specific rotation of group counts:

1x rotation: 10, 14, 14, 11, 15, 10, 16 (message to seven units)
2x rotation: 20, 28, 25, 29, 28, 27 (message to six units)
3x rotation: 30, 31, 38, 30, 32 (message to five units)
4x rotation: 40, 41, 46, 49 (message to four units)
5x rotation: 50, 52, 51 (message to three units)