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: 52.96.79.56
Name:	atod-g2.tm-4.office.com
Address: 52.96.79.248
Name:	atod-g2.tm-4.office.com
Address: 52.96.157.168
Name:	atod-g2.tm-4.office.com
Address: 52.96.79.88
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: 52.96.164.184
atod-g2.tm-4.office.com	canonical name = autod.ms-acdc-autod.office.com.
Name:	autod.ms-acdc-autod.office.com
Address: 2603:1036:304:2852::8
Name:	autod.ms-acdc-autod.office.com
Address: 2603:1036:304:83c::8
Name:	autod.ms-acdc-autod.office.com
Address: 2603:1036:304:340a::8
Name:	autod.ms-acdc-autod.office.com
Address: 2603:1036:304:83e::8