Robtex

Up: 186.209.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 186.209.240.0/22
Down right: 186.209.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
186.209.240.0	PTR	0.240.asn53155.certha.net
186.209.240.2	A+PTR	router-2.certha.net
186.209.240.3	PTR	ns1.certha.net
186.209.240.3	A	mail.certha.net
186.209.240.3	A	certha.inf.br
186.209.240.4	PTR	ns2.certha.net
186.209.240.30	A	www.certha.net
186.209.240.30	A	certha.net
186.209.240.30	A	certha.com.br
186.209.240.34	A+PTR	speed.certha.net
186.209.240.34	A	testing.certha.net
186.209.240.192	A+PTR	mail-192.ultravip.com.br
186.209.240.192	A	ns1.ultravip.com.br
186.209.240.192	A	mailin4.ultravip.com.br
186.209.240.200	A+PTR	mail-200.ultravip.com.br
186.209.240.200	A	mx.ultravip.com.br
186.209.240.200	A	mxin4.ultravip.com.br
186.209.240.208	A	ultravip.com.br
186.209.240.246	A+PTR	mail-1.edimo.com.br
186.209.240.247	A+PTR	mail-2.edimo.com.br
186.209.241.75	A+PTR	blind-241-75-53155.certha.net
186.209.241.109	A+PTR	blind-241-109-53155.certha.net
186.209.241.145	A+PTR	blind-241-145-53155.certha.net
186.209.241.224	A+PTR	blind-241-224-53155.certha.net
186.209.241.226	A+PTR	blind-241-226-53155.certha.net
186.209.242.81	A+PTR	blind-242-81-53155.certha.net
186.209.242.127	A+PTR	blind-242-127-53155.certha.net
186.209.242.214	A+PTR	blind-242-214-53155.certha.net
186.209.242.225	A+PTR	blind-242-225-53155.certha.net
186.209.243.22	A+PTR	mail.metaljunior.com.br
186.209.243.22	A	mx.metaljunior.com.br
186.209.243.69	A+PTR	steady-243-69-53155.certha.net
186.209.243.76	A+PTR	steady-243-76-53155.certha.net
186.209.243.77	A+PTR	steady-243-77-53155.certha.net