shell:$ nslookup -timeout=2 -retry=1 'rcsapp.dtac.co.th'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
rcsapp.dtac.co.th	canonical name = p-rcs-api-elb-01-1587118019.ap-southeast-1.elb.amazonaws.com.
Name:	p-rcs-api-elb-01-1587118019.ap-southeast-1.elb.amazonaws.com
Address: 3.1.171.182