Robtex

Up: 84.232.104.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 84.232.104.0/23
Down right: 84.232.106.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.232.106.3	PTR	mailserver.telecablemurcia.com
84.232.106.3	A	ns1.telecablemurcia.com
84.232.106.4	A+PTR	email.telecablemurcia.es
84.232.106.4	A	mail.insytelmurcia.com
84.232.106.4	A	email.graficasnonduermas.com
84.232.106.12	A	graficasnonduermas.es
84.232.106.13	A	yunque.ingemur.net
84.232.106.34	PTR	mailserver.telecablemurcia.es
84.232.106.52	A+PTR	mhmail.mhrefrigeracion.es
84.232.106.62	A+PTR	mail.mts.com.es
84.232.106.62	A	correo.telecablemurcia.es