Pakistan's area code 042 (or +92 42 in international format) is Lahore, and local numbers generally begin with 3.
Pakistan's telephone area code 0431 (international: +92 431) is Gujranwala, Punjab.
(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 area code for Karachi, Pakistan, including Nazimabad, is +92 21. Within Pakistan, dial 021.
Country codes never begin with zero. Country code +92 is Pakistan.
The country code and area code of Abottabad, Pakistan is 92, (0)992.
The country code and area code of Chitral, Pakistan is 92, (0)943.
The country code and area code of Mardan, Pakistan is 92, (0)937.
The country code and area code of Badin, Pakistan is 92, (0)297.
The country code and area code of Bahawalpur, Pakistan is 92, (0)62.
A Pakistani telephone number beginning with 03 (or +92 3 in international format) is a mobile.
There is no telephone area code 185 in Russia.
The country code and area code of Sibi, Pakistan is 92, (0)833.
The country code and area code of Quetta, Pakistan is 92, (0)81.
The country code and area code of Umerkot, Pakistan is 92, (0)238.