shell:$ nslookup -timeout=2 -retry=1 'eur03.safelinks.protection.outlook.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
eur03.safelinks.protection.outlook.com	canonical name = eop-g2.tm-4.office.com.
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.31
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.27
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.25
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.13
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.53
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.12
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.39
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.48
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9ba0::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9ba1::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9bb6::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9bb3::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b98::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b80::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9bab::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b92::365:f0be