Question

if goa code is 101 and delhi code is 168 then mumbai code?

Answer 1

The code of Delhi and Goa is pre defined and every state is having their own code that the goivernment has decided.

022 is the Mumbai code and everyone calling from or to mumbai, they are in need of doing the calling part and the 022 Code is of Mumbai, India

Answer 2

If Goa code is 101 and Delhi code is 168 then Mumbai code would be 102 (geographically)