App has below features
-Search STD Code from name
-Find name from STD Code
-State wise code list

This Application is offline So, No need of internet connection

# Indian States STD Codes Covered :
Andaman & Nicobar Islands
Andhra Pradesh
Arunachal Pradesh
Assam
Bihar
Chennai
Chhattisgarh
Delhi
Goa
Gujarat
Haryana
Himachal Pradesh
Jammu & Kashmir
Jharkhand
Karnataka
Kerala
Kolkata
Maharashtra
Madhya Pradesh
Mumbai
Manipur
Meghalaya
Mizoram
Nagaland
North East
Orissa
Punjab
Rajasthan
Sikkim
Tamilnadu
Tripura
Uttar Pradesh(East)
Uttar Pradesh(West)
Uttarachal
West Bengal