shell:$ nslookup -timeout=2 -retry=1 'login.xfinity.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
login.xfinity.com	canonical name = login.xfinity.com.edgekey.net.
login.xfinity.com.edgekey.net	canonical name = e69781.dscx.akamaiedge.net.
Name:	e69781.dscx.akamaiedge.net
Address: 23.62.106.140
Name:	e69781.dscx.akamaiedge.net
Address: 23.62.106.137
Name:	e69781.dscx.akamaiedge.net
Address: 2600:1405:d400:8::173e:6a8c
Name:	e69781.dscx.akamaiedge.net
Address: 2600:1405:d400:8::173e:6a89