shell:$ nslookup -timeout=2 -retry=1 'help.activecampaign.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
help.activecampaign.com	canonical name = activecampaigninc.ssl.zendesk.com.
activecampaigninc.ssl.zendesk.com	canonical name = activecampaigninc.zendesk.com.
Name:	activecampaigninc.zendesk.com
Address: 216.198.54.11
Name:	activecampaigninc.zendesk.com
Address: 216.198.53.11