alt4.gmail-smtp-in.l.google.com has address 192.178.163.27
This page provides an online version of the OS hostname and whois commands. It allows you to retrieve publicly available DNS and Whois information for any website or hostname through a single interface.
Host Info
cleantalk.org:~$ host alt4.gmail-smtp-in.l.google.com
alt4.gmail-smtp-in.l.google.com has address 192.178.163.27
alt4.gmail-smtp-in.l.google.com has IPv6 address 2607:f8b0:400e:c17::1b
Whois info
cleantalk.org:~$ whois alt4.gmail-smtp-in.l.google.com
We couldn’t get the data. It may be missing or temporarily unavailable.