shell:$ nslookup -timeout=2 -retry=1 'ui.ff.avast.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
ui.ff.avast.com	canonical name = urlinfo.ff.avast.com.
urlinfo.ff.avast.com	canonical name = urlinfo.cto.ff.avast.com.
urlinfo.cto.ff.avast.com	canonical name = urlinfo-proxy-mci.svc.avast.com.
Name:	urlinfo-proxy-mci.svc.avast.com
Address: 34.54.43.11
Name:	urlinfo-proxy-mci.svc.avast.com
Address: 2600:1901:0:d0bd::