Robtex

Up: 213.255.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 213.255.16.0/21
Down right: 213.255.24.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
213.255.16.7	A	passtech.overmach.com
213.255.16.84	A	tuttialmareee.it
213.255.16.84	A	unmaredivantaggi.it
213.255.16.84	A	spesaregalata.it
213.255.16.166	A	mail.grupposeitel.it
213.255.18.18	PTR	dd213-255-18-18.bo1.albacom.net
213.255.18.25	A	mail.aeronautica.difesa.it
213.255.18.58	A	mail.longospa.it
213.255.18.62	A	longospa.it
213.255.18.156	A	gw.gruppoinnova.com
213.255.18.156	A	gw2.gruppoinnova.com
213.255.20.114	PTR	h213-255-20-114.albacom.net
213.255.22.67	PTR	mail.emilianaserbatoi.it
213.255.22.67	A	mail.emilianaserbatoi.com
213.255.22.67	A	mail01.emilianaserbatoi.com
213.255.26.7	A	spazioammper-web.snam.it
213.255.26.10	A	sampei.stogit.it
213.255.26.14	A	pp-sampei.stogit.it
213.255.26.15	A	pp-spazioammper-web.snam.it
213.255.26.23	A	capacita.snam.it
213.255.26.23	A	normgas.snam.it
213.255.26.23	A	gme.snam.it
213.255.26.32	PTR	dd213-255-26-32.bo1.albacom.net
213.255.26.35	PTR	dd213-255-26-35.bo1.albacom.net
213.255.26.35	A	ecatalog.snam.it
213.255.26.36	A	eauction.snam.it
213.255.26.38	A	ecatalog-test.snam.it
213.255.26.39	A	eauction-test.snam.it
213.255.26.40	A	sip.support.snam.it
213.255.26.51	PTR	dd213-255-26-51.bo1.albacom.net
213.255.26.51	A	imap.snam.it
213.255.26.60	A	logisticagas.snam.it
213.255.26.61	A	logisticagas-tib-is.snam.it
213.255.26.64	PTR	dd213-255-26-64.bo1.albacom.net
213.255.26.64	A	metanosantangelo.it
213.255.26.64	A	mobile.snam.it
213.255.26.83	PTR	dd213-255-26-83.bo1.albacom.net
213.255.26.83	A	da.snam.it
213.255.26.96	PTR	dd213-255-26-96.bo1.albacom.net
213.255.26.96	A	sip.support.snam.it
213.255.26.145	A	www.italgasacqua.it
213.255.26.145	A	www.acamgas.com
213.255.26.162	PTR	dd213-255-26-162.bo1.albacom.net
213.255.26.162	A	crl-bct.bcext.snam.it
213.255.31.186	A	mail.finavalrealestate.com
213.255.31.186	A	mail.fhgroup.it
213.255.31.186	A	mail.laraf.com