What are the offers for office outsourcing services?

Question

Outsourcing

The main production part of the company is software development, and employees work remotely.
But for a legal entity, an office, telephone, postal address is required.
Accounting has been outsourced, now I want to transfer the operational office as well.
In particular:

• Call handling
  
• Letter processing
  
• Creating and sending/receiving documents to clients
  

Are there such office outsourcing services in nature?
ps in the west there is such a thing, but is it in Russia?

Answer 1

I met an advertisement offering such services in Moscow City. Call center services, postal address, etc. If necessary, the provision of an office to receive clients in the same Moscow City.