dig szpitaljp2.zam.pl MX
dig szpitaljp2.zam.pl A
curl "https://stat.ripe.net/data/prefix-overview/data.json?resource=51.75.54.232"
openssl s_client -connect szpitaljp2.zam.pl:443 -showcerts 2>/dev/null | openssl x509 -noout -issuer