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: 52.102.103.5
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.43
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.53
Name:	svc.ms-acdc-eop.office.com
Address: 52.102.103.51
svc.ms-acdc-eop.office.com	canonical name = eop-fs.office.com.
eop-fs.office.com	canonical name = eop-mrc-ww-acdc-fs.trafficmanager.net.
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:9c81::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:9b18::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:988c::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:9924::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:9c96::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:982c::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:9c0d::365:f0be
Name:	eop-mrc-ww-acdc-fs.trafficmanager.net
Address: 2a01:111:f403:9a21::365:f0be