Robtex

Up: 216.174.224.0/20
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Down left: 216.174.224.0/22
Down right: 216.174.228.0/22

IP	Type	Hostname
216.174.224.98	PTR	mail.phcd.org
216.174.224.177	PTR	216-174-224-177.atgi.net
216.174.224.178	PTR	216-174-224-178.atgi.net
216.174.224.179	PTR	216-174-224-179.atgi.net
216.174.224.219	PTR	216.174.224.219.customer.sts.eschelon.com
216.174.224.251	PTR	216.174.224.251.customer.sts.eschelon.com
216.174.225.17	PTR	216-174-225-17.atgi.net
216.174.227.201	PTR	216-174-227-201.atgi.net