shell:$ nslookup -timeout=2 -retry=1 'www.greenhouse.io'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
www.greenhouse.io	canonical name = ingress.prod-usw2-0.greenhouse.io.
Name:	ingress.prod-usw2-0.greenhouse.io
Address: 44.240.146.252
Name:	ingress.prod-usw2-0.greenhouse.io
Address: 54.148.129.127
Name:	ingress.prod-usw2-0.greenhouse.io
Address: 44.236.194.185