shell:$ nslookup -timeout=2 -retry=1 'simreg.smart.com.ph'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
simreg.smart.com.ph	canonical name = simreg-smart-com-ph.smartpldt.d1.rbzdns.com.
Name:	simreg-smart-com-ph.smartpldt.d1.rbzdns.com
Address: 107.178.248.103