Solan, Himachal Pradesh, is in India's telephone area code 01792, which becomes +91 1792 in international format.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
The country code and area code of Solan- Solan, India is 91, (0)1792.
The country code and area code of Arki- Solan, India is 91, (0)1796.
The country code and area code of Nahan- Solan, India is 91, (0)1702.
The country code and area code of Nalagarh- Solan, India is 91, (0)1795.
The country code and area code of Paonta- Solan, India is 91, (0)1704.
The country code and area code of Rajgarh- Solan, India is 91, (0)1799.
India's telephone area code 011 is New Delhi; however, there are no valid numbers beginning with 011 09.
174101
STD Code 0556 in Kushinagar District, Uttar Pradesh, India.
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.
Mumbai is in area code 022, or +91 22 from outside India.