shell:$ nslookup -timeout=2 -retry=1 'apc01.safelinks.protection.outlook.com'
Server:		75.98.161.224
Address:	75.98.161.224#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 = eop-mrc-ww-perf.tm-4.office.com.
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.49
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.46
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.22
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.21
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.16
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.37
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.35
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.34
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9bb4::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9b8c::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9ba7::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9bb3::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9bb0::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9b94::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9bb5::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9b93::365:f0be