The country code and area code of Bulandshahr- Ghaziabad, India is 91, (0)5732.
The country code and area code of Debai- Ghaziabad, India is 91, (0)5734.
The country code and area code of Garhmukteshwar- Ghaziabad, India is 91, (0)5731.
The country code and area code of Hapur- Ghaziabad, India is 91, (0)122.
The country code and area code of Modinagar- Ghaziabad, India is 91, (0)1232.
The country code and area code of Pahasu- Ghaziabad, India is 91, (0)5733.
The country code and area code of Sikandrabad- Ghaziabad, India is 91, (0)5735.
The country code and area code of Siyana- Ghaziabad, India is 91, (0)5736.
The country code and area code of Ghaziaba Dadri- Ghaziabad, India is 91, (0)120.
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.
Khurja, Uttar Pradesh, is in India's area code 05738, which is +91 5738 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 Ajmer, India is 91, (0)145.