Robtex

Up: 199.212.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 199.212.240.0/22
Down right: 199.212.244.0/22

IP	Type	Hostname
199.212.240.99	A+PTR	199-212-240-99.dedicated.allstream.net
199.212.240.99	A	vpn1.fasken.com
199.212.243.34	PTR	firewall.fasken.com
199.212.243.34	PTR	mail.fasken.com
199.212.243.34	PTR	tor.fasken.com
199.212.246.80	A+PTR	autodiscover.fasken.com
199.212.246.80	A	webmail.fasken.com
199.212.246.99	PTR	vpn1.fasken.com
199.212.246.199	A	viafasken.com
199.212.246.207	PTR	reponse.fasken.com
199.212.246.207	A	response.fasken.com
199.212.246.210	A+PTR	ironport2.fasken.com
199.212.246.211	A	efasken.com
199.212.246.211	A	*.efasken.com
199.212.246.211	A	www.efasken.com
199.212.246.216	A+PTR	fmdedcironport.fasken.com
199.212.246.221	A+PTR	seg.fasken.com