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

Non-authoritative answer:
Name:	signalapp.com
Address: 72.14.190.6
Name:	signalapp.com
Address: 2600:3c00::f03c:91ff:fe73:ad5e