shell:$ nslookup -timeout=2 -retry=1 'signup.webex.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
signup.webex.com	canonical name = d3ea8exdgggr3w.cloudfront.net.
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 3.167.183.100
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 3.167.183.90
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 3.167.183.9
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 3.167.183.127
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:6200:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:a00:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:5c00:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:d400:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:ba00:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:7400:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:c400:4:1e13:4f00:93a1
Name:	d3ea8exdgggr3w.cloudfront.net
Address: 2600:9000:25f3:1c00:4:1e13:4f00:93a1