What is the number in indian train number which shows that the train is a super fast train.?

Question

What is the number in indian train number which shows that the train is a super fast train.?

Answer 1

I think there is no specific numbers for superfast identification. pls. let me know

Answer 2

All the train numbers beginning with the number 2 are Super fast trains,like 2915 & 2916 for Ashram Express.

Answer 3

mostly train nos starting with 2 and in four digits all shatabdi and rajdhani nos i know starts with 2 only

Answer 4

first digit will be 2