shell:$ nslookup -timeout=2 -retry=1 'arzt.medflex.de'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
arzt.medflex.de	canonical name = arzt.prod.medflex.de.
Name:	arzt.prod.medflex.de
Address: 57.129.32.187