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-g2.tm-4.office.com.
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.25
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.19
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.4
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.51
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.11
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.13
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.39
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.44
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b8a::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9bb5::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9baa::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b82::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b8c::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b9c::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b8f::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9bac::365:f0be