Robtex

Up: 89.204.240.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 89.204.242.0/24
Down right: 89.204.243.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.204.242.28	A+PTR	smtpa.healthmail.ie
89.204.242.66	A	mail.uvalue.ie
89.204.242.171	A+PTR	remote.sirus.ie
89.204.242.171	A	mail2.sirus.ie
89.204.242.172	A+PTR	remoteservices.sirus.ie
89.204.242.174	A+PTR	link.sirus.ie
89.204.242.186	A+PTR	smtp.jfc.ie
89.204.242.186	A	smtp.jfcplastics.com
89.204.242.186	A	smtp.jfceurope.com
89.204.242.194	PTR	mail.walls.ie
89.204.242.198	A	mail.walls.ie