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

Non-authoritative answer:
api.whatsapp.com	canonical name = web.whatsapp.com.
web.whatsapp.com	canonical name = mmx-ds.cdn.whatsapp.net.
Name:	mmx-ds.cdn.whatsapp.net
Address: 57.144.173.32
Name:	mmx-ds.cdn.whatsapp.net
Address: 2a03:2880:f356:120:face:b00c:0:167