How can I call India from the USA?

You can call India directly from your cell phone or landline phone. International calls can get very expensive when made directly trough the phone provider. India and other countries in Asia are often very expensive calling destinations. You can save money by using an international call service like toolani.
By calling a local number in the USA, toolani will connect you to any phone number in India. Find out more about how toolani works. Rates for cheap calls to India with toolani from the USA are:

only 1.0¢ to a landline number only 8.9¢ to a mobile number

Area codes in India

To call a number in India from abroad, for example in Kolkata, you need to dial +91 (code for India) + 33 (area code Kolkata) + rest of the number (up to 8 digits).

These are the local area phone codes for the most important cities in India:

Local area code	City
11	New Delhi, Delhi
22	Mumbai, Maharashtra
33	Kolkata, West Bengal
44	Chennai
20	Pune, Maharashtra
40	Hyderabad, Telangana
79	Ahmedabad, Gujarat
80	Bengaluru, Karnataka

More information about telephone numbers in India is available on Wikipedia.

Mobile numbers in India

Mobile numbers in India start with 5, 7, 8 or 9.
The format of mobile phone or cell phone numbers is: +91 + xxxx + xxxxxx.
Main mobile operators in India are Jio, Vodafone India, Airtel and BSNL with a combined number of more than 1.1 billion subscribers.