Where can I get a database of postal codes with FIAS codes?

Question

Database

I need to bind postal codes to the existing FIAS codes. The difficulty is that there are significant problems with indexes in the FIAS database itself, so another source is needed, ideally, the databases of the Russian Post.

Answer 1

The reference directory of postal codes of postal objects (Reference Directory) was developed by the Directorate of Technology and Informatization of the Federal State Unitary Enterprise Russian Post. Maintenance, up-to-date support and distribution of the reference guide are carried out by the employees of the Directorate.
The reference directory of postal codes of postal objects provides data on postal codes, subordination and names of postal objects. The data of the reference directory are official information about the indexes of postal objects of the Federal State Unitary Enterprise Russian Post.
vinfo.russianpost.ru/database/ops.html