shell:$ nslookup -timeout=2 -retry=1 'iub.edu.bd'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	iub.edu.bd
Address: 216.239.36.21
Name:	iub.edu.bd
Address: 216.239.32.21
Name:	iub.edu.bd
Address: 216.239.34.21
Name:	iub.edu.bd
Address: 216.239.38.21
Name:	iub.edu.bd
Address: 103.81.69.22