shell:$ nslookup -timeout=2 -retry=1 'opensignal.inifree.biz.id'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	opensignal.inifree.biz.id
Address: 13.35.202.129
Name:	opensignal.inifree.biz.id
Address: 13.35.202.42
Name:	opensignal.inifree.biz.id
Address: 13.35.202.77
Name:	opensignal.inifree.biz.id
Address: 13.35.202.38