Today in Russia the largest operators of mobile communication service providers are MegaFon, Mobile TeleSystems (MTS), Beeline" and "Tele 2".
Look at the number and note the second, third and fourth digit numbers. To subscribers "the Megaphone" belongs to phone numbers starting with the following codes: +7 495 (identical to 925), 812 (identical 921), 920, 921, 922, 923, 924, 925, 926, 927, 928, 929, 930, 931, 932, 933, 937, 938.
Rooms "MTS" begin with the numbers: +7 916, 985 (direct) and many others, depending on the region where you purchased the SIM card.
Mobile numbers "Beeline" have the digital code +7 903, 960, 963, 964, and many others.
Rooms "Tele 2" begin with the combinations +7 902, 904, 908, 950, 951 and others.
Not to be mistaken in the diversity of mobile numbers and mobile operators, rather just to know mobile operator of the caller's phone number through a special service that contains a database with detailed information about mobile codes and prefixes.
One such service provided by the website "Guide to the Portal" located at:
In your browser, open a new tab and go to this website. You will see the box called "Enter mobile number". Enter in this column the number of the mobile that you are interested in, call format: 8XXXZZZZZZZ, where XXX is the operator code, ZZZZZZZ – mobile. After entering the full number, click "Define operator".
The page will reload and the screen will display information about the country and the region of the operator, and the name of the mobile operator. Here you can see the official website of the company and society-master. Further below you will see a map of the state and highlighted the region that represents where you purchased the SIM card.