shell:$ nslookup -timeout=2 -retry=1 'sitescan-eu1.arcgis.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	sitescan-eu1.arcgis.com
Address: 13.249.141.28
Name:	sitescan-eu1.arcgis.com
Address: 13.249.141.31
Name:	sitescan-eu1.arcgis.com
Address: 13.249.141.36
Name:	sitescan-eu1.arcgis.com
Address: 13.249.141.68