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

Non-authoritative answer:
autodiscover.whatsapp.com	canonical name = autodiscover.fb.com.
autodiscover.fb.com	canonical name = autodiscover.outlook.com.
autodiscover.outlook.com	canonical name = atod-g2.tm-4.office.com.
Name:	atod-g2.tm-4.office.com
Address: 52.96.163.40
Name:	atod-g2.tm-4.office.com
Address: 52.96.79.200
Name:	atod-g2.tm-4.office.com
Address: 52.96.163.8
Name:	atod-g2.tm-4.office.com
Address: 52.96.201.120
Name:	atod-g2.tm-4.office.com
Address: 52.96.79.72
Name:	atod-g2.tm-4.office.com
Address: 52.96.164.136
Name:	atod-g2.tm-4.office.com
Address: 52.96.164.168
Name:	atod-g2.tm-4.office.com
Address: 52.96.64.232
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:838::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:284c::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:2820::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:2852::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:800::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:2850::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:3409::8
Name:	atod-g2.tm-4.office.com
Address: 2603:1036:304:806::8