shell:$ nslookup -timeout=2 -retry=1 'outlook.office365.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
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: 52.96.201.114
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.170.82
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.79.146
Name:	MDW-efz.ms-acdc.office.com
Address: 52.96.79.50
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:872::2
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:2852::2
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:86e::2
Name:	MDW-efz.ms-acdc.office.com
Address: 2603:1036:304:285b::2