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

Non-authoritative answer:
cdn.opensignal.com	canonical name = cdn.opensignal.com.cdn.cloudflare.net.
Name:	cdn.opensignal.com.cdn.cloudflare.net
Address: 172.66.43.86
Name:	cdn.opensignal.com.cdn.cloudflare.net
Address: 172.66.40.170
Name:	cdn.opensignal.com.cdn.cloudflare.net
Address: 2606:4700:3108::ac42:2b56
Name:	cdn.opensignal.com.cdn.cloudflare.net
Address: 2606:4700:3108::ac42:28aa