Input city name or STD code. You can also brows STD code by state from the list.
STD Code: 3592
If calling a phone number in Gangtok from within india, you can dial std code and then the telephone number with prefix as zero (0) or country code (+91).
For example if you are dialing telephone number 1234567 in Gangtok then you should dial 035921234567 or +91 3592 1234567.
If dialling from outside India, dial India country code +91 and then std code of Gangtok and then telephone number.
For example you are dialing telephone number 1234567 in Gangtok then you should dial +91 3592 1234567.