shell:$ nslookup -timeout=2 -retry=1 'apc01.safelinks.protection.outlook.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
apc01.safelinks.protection.outlook.com	canonical name = eop.mira.tm.svc.cloud.microsoft.
eop.mira.tm.svc.cloud.microsoft	canonical name = acdcatm.eop.mira.tm.svc.cloud.microsoft.
acdcatm.eop.mira.tm.svc.cloud.microsoft	canonical name = svc.ms-acdc-eop.office.com.
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.6
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.15
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.22
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.9
Name:	svc.ms-acdc-eop.office.com
Address: 2a01:111:f403:9b83::365:f0be
Name:	svc.ms-acdc-eop.office.com
Address: 2a01:111:f403:9b92::365:f0be
Name:	svc.ms-acdc-eop.office.com
Address: 2a01:111:f403:9b9c::365:f0be
Name:	svc.ms-acdc-eop.office.com
Address: 2a01:111:f403:9ba2::365:f0be