Check out STD codes of major cities of Kerala, India.
Given here is a list of Kerala STD (Standard Trunk Dialing) codes. These STD codes of Kerala cities will be helpful for you when traveling in India. Most phone booths have list of Kerala major STD codes, yet having a list of your own never hurts! If you have to make a call from outside India to any city in Kerala, first dial 0091, followed by the STD code of the city you are calling and finally the phone number.