Robtex

Up: 199.217.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 199.217.8.0/23
Down right: 199.217.10.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
199.217.9.201	A+PTR	ipgate.dbc.com
199.217.9.201	PTR	ip9-201.esignal.com
199.217.9.201	PTR	ipgate.esignal.info
199.217.10.3	A+PTR	mwreg.dbc.com
199.217.10.3	PTR	ip10-3.esignal.com
199.217.10.3	PTR	mwreg.esignal.info
199.217.10.8	A	reg.esignal.biz
199.217.10.11	PTR	ip10-11.esignal.com
199.217.10.11	A	owa.esignal.biz
199.217.10.24	A	re.esignal.biz
199.217.10.25	A	olreg.dbc.com
199.217.10.28	PTR	secure.esignal.biz
199.217.10.28	PTR	ip10-28.esignal.com
199.217.10.28	PTR	secure.esignal.info
199.217.10.203	A+PTR	srvrmg2.esignal.com
199.217.10.203	A+PTR	mail.mg2.esignal.com