shell:$ nslookup -timeout=2 -retry=1 'mail.sightcall.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
mail.sightcall.com	canonical name = 23533416.group16.sites.hubspot.net.
23533416.group16.sites.hubspot.net	canonical name = group16.sites.hscoscdn10.net.
Name:	group16.sites.hscoscdn10.net
Address: 199.60.103.31
Name:	group16.sites.hscoscdn10.net
Address: 199.60.103.225
Name:	group16.sites.hscoscdn10.net
Address: 2606:2c40::c73c:671f
Name:	group16.sites.hscoscdn10.net
Address: 2606:2c40::c73c:67e1