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

Non-authoritative answer:
Name:	crt.sca1b.amazontrust.com
Address: 3.167.180.35
Name:	crt.sca1b.amazontrust.com
Address: 3.167.180.75
Name:	crt.sca1b.amazontrust.com
Address: 3.167.180.98
Name:	crt.sca1b.amazontrust.com
Address: 3.167.180.79