Оператор по телефонному номеру is a free Android application developed by Sazhenin. It falls under the category of Social & Communication. This app allows users to determine the telecom operator and region of a phone number in Russia. Whether it's a mobile (DEF) or landline (ABC) phone number, this app can provide information about the current and previous owners of the number, as well as the region. It is particularly useful when a user switches their mobile operator (MNP), as it can show the first and current owner of the phone number, along with the region. With its simple and straightforward interface, Оператор по телефонному номеру is a convenient tool for identifying telecom operators and regions based on phone numbers in Russia.