shell:$ nslookup -timeout=2 -retry=1 'crl.sca1b.amazontrust.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	crl.sca1b.amazontrust.com
Address: 3.160.30.228
Name:	crl.sca1b.amazontrust.com
Address: 3.160.30.75
Name:	crl.sca1b.amazontrust.com
Address: 3.160.30.231
Name:	crl.sca1b.amazontrust.com
Address: 3.160.30.20