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A telephone number in India beginning with 0814 is a mobile. 08142 and 08143 are in Andhra Pradesh.
A telephone number in India beginning with +91 9814 is a mobile, probably in or near Punjab.
I recommend the World Telephone Numbering Guide.
by using a telephone or a mobile phone and placing an international call.
Hyderabad is part of the Andhra Pradesh mobile calling circle, which has many, many different mobile codes assigned to it.