When an incoming call is separate the country code is one or two digits in front of the number.
The following code from three to six digits – the area code. Make a note of it.
Under the article the link to the site directory "BTK" (the first link). The website also offers a city search on codes. In the search box, enter country and area code, click "Search". After a few seconds you will be shown the city that owns the code.
To determine the city code in mobile phone , you can go to the website "J-s-M-inform" and enter the whole number in the international format in the search box (with country code). After pressing Enter you will be given information about the place of registration (country and region) and of the operator.
Other resources to determine the city code in mobile phone are listed below. The principle of operation with them are similar.