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: 54.201.30.86
Name:	greenhouse.io
Address: 34.211.70.254
Name:	greenhouse.io
Address: 34.209.1.191