shell:$ nslookup -timeout=2 -retry=1 'online.rahpooyan.ir'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
online.rahpooyan.ir	canonical name = lmsbase.rahpooyan.ir.
Name:	lmsbase.rahpooyan.ir
Address: 86.104.33.227