shell:$ nslookup -timeout=2 -retry=1 'ocsp.rootca1.amazontrust.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	ocsp.rootca1.amazontrust.com
Address: 54.230.110.151
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:4200:0:566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:8200:0:566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:7a00:0:566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007::566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:b800:0:566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:ce00:0:566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:e200:0:566:22d5:d9e1
Name:	ocsp.rootca1.amazontrust.com
Address: 2600:9000:2007:de00:0:566:22d5:d9e1