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Area codes cannot start with a 1 or 0 in the North American Numbering Plan.
The area code of NOIDA, Uttar Pradesh, India, is 0120, or +91 120 from outside India.
The telephone area code for Dalhousie, Himachal Pradesh, is 01899, or +91 1899 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.)
201301
I can find no indication that the area code for Ghaziabad was ever 085. All current area codes beginning with 085 are in Andhra Pradesh, not Uttar Pradesh, halfway across the country. The area code for Ghaziabad is 0120.
Indore, Madhya Pradesh, India, is in area code +91 731, or 0731 within India.
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.
01478 within India, or +91 1478 from elsewhere.
post code of uttar pradesh
Indore is in area code 0731 (international: +91 731)
You have to specify the country, since several countries use the term "STD Code" to refer to telephone area codes. See the Related Questions below.