shell:$ nslookup -timeout=2 -retry=1 'ool-44c1b2b0.dyn.optonline.net'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	ool-44c1b2b0.dyn.optonline.net
Address: 68.193.178.176