The database contains information about the ranges of telephone numbers issued to the operator. This database is the most complete and current database of all existing on the market and includes the ranges of numbers of all operators performing work in the territory of the Russian Federation today. Thanks to this information, you can accurately determine the city, region and operator of any Russian phone number. Such functionality will be useful to any service, directly or indirectly working with clients' phones and wishing to determine the client's location before talking to him by phone.
Relevance: 07/10/2020.
The base of numbers is a CSV file containing the following fields: Number prefix (first 3 digits), Start and End number ranges, Number of numbers in a range, Operator, City and region. If desired, a MySQL dump or any other DB can be easily obtained.

After purchase, you will receive a CSV file of the following form:
301;2100000;2109999;10000;"ОАО ""АСВТ""";г. Улан - Удэ|Республика Бурятия
301;2110000;2129999;20000;"ПАО ""Ростелеком""";г. Улан-Удэ|Республика Бурятия
301;2150000;2169999;20000;"ПАО ""Ростелеком""";г. Улан-Удэ|Республика Бурятия
etc.

After purchasing the product you get 3 months of free updates of the database.