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: 52.102.103.49
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.37
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.11
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.39
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.51
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.52
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.12
Name:	eop-g2.tm-4.office.com
Address: 52.102.103.22
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9bb2::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9ba8::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9ba9::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b9a::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b91::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:f403:9b8d::365:f0be
Name:	eop-g2.tm-4.office.com
Address: 2a01:111:f403:9b9e::365:f0be