Iran is country code +98.
You must drop the trunk prefix '0' from the beginning of the Iranian number when calling from other countries. For example, Tehran's area code 021 becomes +98 21.
Mobile numbers begin with +98 9.
(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.)
Tehran is in Iranian telephone area code 021, which is +98 21 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.)
That depends on whether you are talking about Iran or Uganda. Please specify the country in your question.
The country code and area code of Golestan, Iran is 98, (0)171.
The country code and area code of Babol, Iran is 98, (0)111.
The country code and area code of Hamedan, Iran is 98, (0)811.
The country code and area code of Kermanshah, Iran is 98, (0)831.
The country code and area code of Fars, Iran is 98, (0)711.
The country code and area code of Gilan, Iran is 98, (0)131.
The country code and area code of Hormozgan, Iran is 98, (0)761.
The country code and area code of Kerman, Iran is 98, (0)341.
The country code and area code of Khorasan, Iran is 98, (0)511.
The country code and area code of Khuzestan, Iran is 98, (0)611.
The country code and area code of Lorestan, Iran is 98, (0)661.