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: 52.102.103.18
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.26
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.31
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.30
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.38
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.2
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.13
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 52.102.103.16
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9bae::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9ba4::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:f403:9ba3::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9b84::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9b8a::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9b89::365:f0be
Name:	eop-mrc-ww-perf.tm-4.office.com
Address: 2a01:111:f403:9bb2::365:f0be