shell:$ nslookup -timeout=2 -retry=1 'greenhouse.io'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	greenhouse.io
Address: 34.211.135.169
Name:	greenhouse.io
Address: 54.185.214.84
Name:	greenhouse.io
Address: 44.230.37.63