Robtex

Up: 216.27.200.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.27.200.0/23
Down right: 216.27.202.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.27.200.0	A+PTR	0.200.27.216.static.ip.tnltd.net
216.27.200.110	PTR	110.200.27.216.static.ip.tnltd.net
216.27.201.0	A+PTR	0.201.27.216.static.ip.tnltd.net
216.27.201.35	A	artisanfields.com
216.27.201.60	A	mail.midwestind.com
216.27.201.232	A+PTR	232.201.27.216.static.ip.tnltd.net
216.27.201.232	A	proxy.hca8.ord.tnltd.net
216.27.201.232	A	proxy.tdc1.ord.tnltd.net
216.27.201.235	PTR	235.201.27.216.static.ip.tnltd.net
216.27.202.0	A+PTR	0.202.27.216.static.ip.tnltd.net
216.27.202.116	A+PTR	116.202.27.216.static.ip.tnltd.net
216.27.202.132	A+PTR	132.202.27.216.static.ip.tnltd.net
216.27.202.191	A+PTR	191.202.27.216.static.ip.tnltd.net
216.27.202.192	A+PTR	192.202.27.216.static.ip.tnltd.net
216.27.202.235	A+PTR	gw3.optomausa.com
216.27.202.235	A	mail.optomausa.com
216.27.202.245	A+PTR	245.202.27.216.static.ip.tnltd.net
216.27.202.247	PTR	247.202.27.216.static.ip.tnltd.net
216.27.202.247	A	www.optoma.com
216.27.202.247	A	optoma.com
216.27.202.251	PTR	251.202.27.216.static.ip.tnltd.net
216.27.202.251	A	optoma.com.mx
216.27.202.251	A	www.optoma.com.mx
216.27.203.0	A+PTR	0.203.27.216.static.ip.tnltd.net
216.27.203.34	A+PTR	34.203.27.216.static.ip.tnltd.net
216.27.203.156	A+PTR	156.203.27.216.static.ip.tnltd.net
216.27.203.204	PTR	204.203.27.216.static.ip.tnltd.net
216.27.203.229	PTR	mail.buesingcorp.com
216.27.203.231	PTR	231.203.27.216.static.ip.tnltd.net
216.27.203.246	PTR	246.203.27.216.static.ip.tnltd.net