shell:$ nslookup -timeout=2 -retry=1 'csportal.tcscourier.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
csportal.tcscourier.com	canonical name = farm-iis-01.tcscourier.com.
Name:	farm-iis-01.tcscourier.com
Address: 103.100.202.26