Why does it give an error err_name_not_resolved fix on the site when accessing through the internal network?

Question

Domain Name System

Gives an error on the company website website not found, error: err_name_not_resolved fix .
Through other networks comes normally, but through a network of firm is not present.
What I tried:
through the console to remove DNS-Cash
ipconfig /flushdns
Also:

ipconfig /registerdns
ipconfig /release
ipconfig /renew
ipconfig /all
netsh winsock reset

After that, miraculously, it turned out to launch the site on 2 devices.
On others to no avail, although all in the same network.
Tried
1. Restart DNS service
2. Delete browser data.
3. Restart your computer every time.
4. Tried to restart the router.
Zero result.
I also saw such an option that you can use Google's public DNS, that is, in the network settings, set DNS1 to 8.8.8.8 and DNS2 to 8.8.4.4 (on Android). But we can't do that in a firm.

Answer 1

The NS server used by the computers on your local network does not know the IP address of the required site. And not only does it not know, it is not configured to ask the IP address of this site from other, upstream NS servers that know this IP address... Ask the administrator to figure it out.
Manual fix mode - write the IP address and site name (in the form 123.456.789.012 site.com , where the IP address should be yours, real) on each computer in the file C:\Windows\system32\drivers\etc\hosts , and in the console do ipconfig /flushdns .