shell:$ nslookup -timeout=2 -retry=1 'css-uat.aon.cz'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
css-uat.aon.cz	canonical name = css-uat.aon.cz.web.emea.aon.com.
Name:	css-uat.aon.cz.web.emea.aon.com
Address: 199.245.3.75