Turns out 85.10.196.124 http-redirects to [random-combination].edns.ip-api.com, which forces the DNS server set on my system to contact ip-api.com and resolve this domain, as it is not cached.

For some reason, Nekoray, which I use as VPN client, uses my ISP's DNS to do resolution. This allows ip-api.com website to track the DNS query and see my ISP's DNS IP. In Nekoray settings I have DNS set to dns.google, but it looks like for some reason it's not using it.

I'm gonna look into Nekoray's settings now to find the reason.