Robtex

Up: 216.240.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.240.60.0/23
Down right: 216.240.62.0/23

IP	Type	Hostname
216.240.61.9	A	mail.martin-martin.net
216.240.61.11	PTR	216-240-61-11.aerioconnect.net
216.240.61.61	A	smtp1.concordecommunications.com
216.240.61.61	A	mail.clcenter.com
216.240.61.130	PTR	216-240-61-130.aerioconnect.net
216.240.61.130	A	radlogin.com
216.240.61.134	PTR	216-240-61-134.aerioconnect.net
216.240.61.184	PTR	216-240-61-184.aerioconnect.net
216.240.62.10	PTR	robinkex.robink.com
216.240.62.12	PTR	fw-v0.jamison.aerioconnect.net
216.240.62.12	A	mail.ebellatrix.com
216.240.62.13	A	robinkex.robinkus.com
216.240.62.13	A	robinkex2.robinkus.com
216.240.62.14	PTR	mail.robink.com
216.240.62.14	A	mail.ebellatrix.com
216.240.62.14	A	ebellatrix.com
216.240.62.67	PTR	216-240-62-67.aerioconnect.net
216.240.62.105	PTR	216-240-62-105.aerioconnect.net
216.240.62.119	PTR	216-240-62-119.aerioconnect.net
216.240.62.150	PTR	216-240-62-150.aerioconnect.net
216.240.62.151	PTR	216-240-62-151.aerioconnect.net
216.240.62.196	PTR	216-240-62-196.aerioconnect.net
216.240.62.216	PTR	216-240-62-216.aerioconnect.net
216.240.62.225	PTR	216-240-62-225.aerioconnect.net
216.240.63.11	A	dns2.aerioconnect.net
216.240.63.12	A+PTR	dns-3.aerioconnect.net
216.240.63.13	PTR	fw-6-w1.oc530.aerioconnect.net
216.240.63.13	A	dns-4.aerioconnect.net
216.240.63.59	A+PTR	speedtest-1.aerioconnect.net
216.240.63.111	A	lax.aerioconnect.net
216.240.63.205	A	rsw-0.vcti.aerioconnect.net
216.240.63.213	PTR	unified-gw2.bi4000-1.onew.aerioconnect.net
216.240.63.251	PTR	fw-m14-w1.owb.aerioconnect.net