Despite picking up 22 wickets in five Tests, Ahmed has not been a regular in the squad and was overlooked for the recently concluded home series against India, even after first-choice spinner Shoaib Bashir was sidelined by injury.
Six zones - South, Central, West, East, North, and North-East - will take part in the tournament, which will be played in a knock-out format.
On Sunday, the Bengal pacer was seen bowling full tilt at the M Chinnaswamy Stadium after India lost the first Test against New Zealand. Shami said that was the first time he had bowled with a full run-up since his recovery.
The coveted Ranji Trophy will start from 9 December and will go on till 13 March 2020. The new format of the trophy, which was introduced last year, remains the same.
