shell:$ nslookup -timeout=2 -retry=1 'forms.appsflyer.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
forms.appsflyer.com	canonical name = domains2.fillout.com.
Name:	domains2.fillout.com
Address: 143.198.13.40