Robtex

Up: 217.115.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 217.115.21.0/25
Down right: 217.115.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.115.21.2	A+PTR	email.ramero.it
217.115.21.10	A+PTR	mail.sorgenteorticaia.com
217.115.21.21	A+PTR	host021.pool021115217.sta.multiwire.net
217.115.21.26	PTR	mx2.cis.pt.it
217.115.21.34	A+PTR	host034.pool021115217.sta.multiwire.net
217.115.21.47	A+PTR	host047.pool021115217.sta.multiwire.net
217.115.21.54	PTR	mail.gruppoerrepi.com
217.115.21.54	A	gruppoerrepi.com
217.115.21.56	A	host056.pool021115217.sta.multiwire.net
217.115.21.74	A+PTR	mail.iscomcuneo.it
217.115.21.74	A	a.mx.confcommerciocn.com
217.115.21.74	A	mx.confcommerciocn.com
217.115.21.82	PTR	email.pagliero.com
217.115.21.92	A+PTR	host092.pool021115217.sta.multiwire.net
217.115.21.92	A	www.grafart.it
217.115.21.92	A	*.grafart.it
217.115.21.94	A+PTR	host094.pool021115217.sta.multiwire.net
217.115.21.94	A	mail.grafart.it
217.115.21.94	A	lamanovella.net
217.115.21.138	A+PTR	host138.pool021115217.sta.multiwire.net
217.115.21.186	A	mx1.nfcoop.it
217.115.21.190	A+PTR	mail2.pagliero.com
217.115.21.190	A	host190.pool021115217.sta.multiwire.net
217.115.21.202	A	mail.golfodelsole.com
217.115.21.210	A+PTR	smtprelay.crsaluzzo.it
217.115.21.210	A	mail.crsaluzzo.it
217.115.21.226	PTR	host226.pool021115217.sta.multiwire.net
217.115.21.226	A	mx.studioancillotti.it
217.115.21.226	A	studioancillotti.it
217.115.21.230	PTR	host230.pool021115217.sta.multiwire.net
217.115.21.230	A	mail2.grafart.it
217.115.21.234	A+PTR	kerio.mtmhydro.it
217.115.21.242	A+PTR	host242.pool021115217.sta.multiwire.net
217.115.21.242	A	oldemail.bongioannimacchine.com