hyderabad std code number
Hyderabad, Andhra Pradesh (STD) Code 40 Phone Numbers. The 40 Area Code (or STD Code 40) is located in Hyderabad, state of Andhra Pradesh. Area Code 40 is one of the 269 4-digit second-tier telephone area codes in India. It covers roughly 717,865 unique phone numbers and 1,393,053 individuals in City of Hyderabad, state of Andhra Pradesh.