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

Non-authoritative answer:
index.appsflyer.com	canonical name = index.appsflyer.com.cdn.cloudflare.net.
Name:	index.appsflyer.com.cdn.cloudflare.net
Address: 104.18.25.21
Name:	index.appsflyer.com.cdn.cloudflare.net
Address: 104.18.24.21
Name:	index.appsflyer.com.cdn.cloudflare.net
Address: 2606:4700::6812:1815
Name:	index.appsflyer.com.cdn.cloudflare.net
Address: 2606:4700::6812:1915