The easiest way to find out the information you need is by telephone. And for this you need to know the landline number, the search for which, with the wrong approach, can take quite a long time.
Before you start looking for the desired phone number of the organization, find out the maximum amount of data about it. If the company is large or one of a kind, then the task is much easier: it most likely has an official website that contains the information you are interested in. You can find out about the availability of a web page using search engines - just enter the name of the company. This is the easiest way to find government organizations or leading players in their industry (Gazprom, AvtoVAZ, Aeroflot).
If the name of the company is widespread, but its address is available, then in a number of cities you can use the 2GIS program to search. The electronic directory contains the most complete information about companies, the reliability of which is beyond doubt: it is updated monthly. To access the data, you just need to download the application from the website and install it.
If the company is registered recently, then it makes sense to turn to SPARK services. You can access the business database through the guest login, but keep in mind that some of the information, including the organization's phone number, may only be available to subscribers.
The surest way to get the right phone number for a legal entity is to contact the help desk. Company information is usually provided free of charge, but consulting for money has been thriving lately. Therefore, when trying to find out information on the phone, you need to be careful - some services charge money for the very fact of the call.
Finding your home landline number is a real challenge. To obtain reliable information, you can refer to special reference books in paper binding or the help desk. However, such a service is always paid, regardless of the effectiveness. In addition to everything, you need to know the surname and initials of the person for whom the phone number is issued.
You can find the right phone number at the address only on the Internet or with the help of a private detective. The second method will allow you to get the most accurate result, but the first one can lead on the wrong track. The fact is that Internet databases that are open to all provide for the most part outdated information that is 10-15 years old. Therefore, if the once assigned home phone number is still assigned to the address, then they will be effective, but if not, you will have to look for a workaround.