shell:$ nslookup -timeout=2 -retry=1 'portal-iot.vodacom.co.tz'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
portal-iot.vodacom.co.tz	canonical name = 5s8d6xx.ng.impervadns.net.
Name:	5s8d6xx.ng.impervadns.net
Address: 45.60.109.192