shell:$ nslookup -timeout=2 -retry=1 'outlook.office.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
outlook.office.com	canonical name = substrate.office.com.
substrate.office.com	canonical name = outlook.office365.com.
outlook.office365.com	canonical name = ooc-g2.tm-4.office.com.
ooc-g2.tm-4.office.com	canonical name = outlook.ms-acdc.office.com.
outlook.ms-acdc.office.com	canonical name = MDW-efz.ms-acdc.office.com.
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.79.130
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.191.242
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.157.130
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.157.114
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:81d::2
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:340b::2
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:85f::2
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:284c::2