For subscribers receiving calls from unknown numbers, it may be necessary to identify the service provider who owns the number. It may also be required in other cases. There are several options for solving this problem.
Instructions
Step 1
The first option is the use of various programs that have a built-in base of mobile codes and operators. As a rule, they have freeware status, i.e. are distributed freely. Examples include the following programs:
- "Operators of Russia" (https://defcod.blogspot.com), also has a java version for mobile phones and a version for Android;
- "Mobile Operators" (https://dekan.ru/p_mobile_operators.html).
Step 2
In addition to the program, you can use one of the Internet services, with the help of which the operator is identified by the phone number. The abundance of such services allows you to choose the most suitable one. Some of them also provide additional information regarding the designated number. Examples of such services are:
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Step 3
The operation of both the programs defining the operator and the Internet services is based on the DEF code - the first three digits of the phone number. Each of these codes is assigned to a specific operator or several. Knowing the correspondence of DEF codes and telecom operators, you can independently determine the belonging of the number.
Step 4
The following codes are allocated for operators of the Big Three:
- "Beeline": 903, 905, 906, 909, 960-968;
- "Megafon": 920-928, 930-938, some 929 and 997;
- "MTS": 910-919, 980-989.
Step 5
Other operators offering GSM communication services use codes 900, 902, 904, 908, 940, 950-953, 955, 956. Operators offering CDMA communication services use codes 901 and 907 (SkyLink). Satellite operators use the code 954.
