Impossible to tell without knowing what country you're talking about.
For dialing a telephone number outside your local area.
In what country?
628 is an area code for the San Francisco area.
00353 + the area code
In the UK, 01408 is the area code for Golspie.
Yes. But is it not used if you are dialing from within that Area Code.
The dialing code for the USA from the UK is 00 1 The area codes for Houston, Texas, are 713, 281, and 832
The telephone country code for Zimbabwe is +263. The area code for Shangani is 050, or +263 50 in international format.
01456
The telephone country code for Vietnam is +84. The area code for Dak Lak is 050, or +84 50 in international format.
Did you mean area code? They are 228, 601, and 662. If you are dialing from outside North America, you have to dial the country code for US (which is "1") and then the area code.
Mumbai is in area code 022, or +91 22 from outside India.