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

Non-authoritative answer:
track.opticks.io	canonical name = prod.opticks.io.
Name:	prod.opticks.io
Address: 62.212.87.243
Name:	prod.opticks.io
Address: 62.212.87.244