Robtex

Up: 5.98.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 5.98.64.0/20
Down right: 5.98.80.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.98.64.148	A	mail.sifaspa.it
5.98.64.148	A	mail.sifadesign.it
5.98.64.148	A	mail.sifadesign.net
5.98.65.211	A	colkim.com
5.98.66.226	A+PTR	sbs.datavel.com
5.98.67.28	A	mxbk.endura.it
5.98.67.203	A	mail.italmicro.com
5.98.69.193	A	mx.ronzoni-partner.it
5.98.70.74	A	posta.seriartg2.com
5.98.70.82	A	mail.ordineavvocatipesaro.it
5.98.70.203	A	mailscan.gambinimeccanica.it
5.98.70.203	A	host203-70-static.98-5-b.business.telecomitalia.it
5.98.72.226	A	mail.alimentarearesu.it
5.98.74.122	A	mail.impresaintelligente.com
5.98.74.122	A	mail.impresaintelligente.it
5.98.74.122	A	mail.eusebiassociati.it
5.98.75.82	A	mailsrv.rossiepartners.com
5.98.75.145	A	host145-75-static.98-5-b.business.telecomitalia.it
5.98.76.18	A	company.enerblu.it
5.98.76.57	A	mail.geovest.it
5.98.76.57	A	mail2.geovest.it
5.98.76.132	A	mail.nickesons.com
5.98.76.153	A	host153-76-static.98-5-b.business.telecomitalia.it
5.98.76.235	A	mail.marzocchigroup.com
5.98.76.235	A	marzocchigroup.com
5.98.77.74	A	host74-77-static.98-5-b.business.telecomitalia.it
5.98.78.13	A	host13-78-static.98-5-b.business.telecomitalia.it
5.98.78.16	A	host16-78-static.98-5-b.business.telecomitalia.it
5.98.78.66	PTR	mail3.lesepidado.it
5.98.78.67	A	mail3.lesepidado.it
5.98.78.83	A	host83-78-static.98-5-b.business.telecomitalia.it
5.98.78.98	A	posta.eurocolorspa.eu
5.98.78.100	A	m.eurocolorspa.eu
5.98.78.104	A	host104-78-static.98-5-b.business.telecomitalia.it
5.98.78.111	A	host111-78-static.98-5-b.business.telecomitalia.it
5.98.78.156	A	host156-78-static.98-5-b.business.telecomitalia.it
5.98.78.213	A	host213-78-static.98-5-b.business.telecomitalia.it
5.98.78.216	A	host216-78-static.98-5-b.business.telecomitalia.it
5.98.78.227	A+PTR	host227-78-static.98-5-b.business.telecomitalia.it
5.98.78.240	A	host240-78-static.98-5-b.business.telecomitalia.it
5.98.78.252	A	host252-78-static.98-5-b.business.telecomitalia.it
5.98.79.11	A	mail.faitadriatica.it
5.98.79.100	A	mail.nazionaleelettronica.it
5.98.79.224	A+PTR	host224-79-static.98-5-b.business.telecomitalia.it
5.98.80.66	A+PTR	vserver66.switchdns.net
5.98.80.67	A+PTR	vserver67.switchdns.net
5.98.80.67	A	ns1.switchdns.net
5.98.80.67	A	ns1.teamsystem-ancona.com
5.98.80.96	A+PTR	vserver96.switchdns.net
5.98.80.97	A+PTR	vserver97.switchdns.net
5.98.80.98	PTR	vserver98.switchdns.net
5.98.80.98	A	vip16.teamsystem-ancona.com
5.98.80.98	A	teamsystem-ancona.com
5.98.80.99	PTR	vserver99.switchdns.net
5.98.80.130	A	mail.scs-srl.com
5.98.82.99	A+PTR	host99-82-static.98-5-b.business.telecomitalia.it
5.98.82.99	A	mailbck.nordelettrica.eu
5.98.82.99	A	mailbck.neimpianti.it
5.98.82.146	A	posta.consav.com
5.98.83.19	A	mail.polimor.it
5.98.84.210	A	mail.chimsider.it
5.98.84.218	A	srv.fondazionemanodori.it
5.98.84.218	A	posta.fondazionemanodori.it
5.98.85.26	A	mail.rossidimension.it
5.98.85.26	A	mail.rossifarma.it
5.98.85.26	A	mail.lai55.it
5.98.86.10	A	booking2you.com
5.98.86.13	A	host13-86-static.98-5-b.business.telecomitalia.it
5.98.86.99	A	mail.4davide.com
5.98.86.141	A	host141-86-static.98-5-b.business.telecomitalia.it
5.98.86.165	A	mail.trascoop.com
5.98.86.202	A	mail.pazzinieditore.it
5.98.86.202	A	cloud.pazzinieditore.it
5.98.86.203	A	crm.pazzinieditore.it
5.98.86.205	A	flusso.pazzinieditore.it
5.98.87.10	A	posta.espansione.it
5.98.88.129	A	mail.azetapromo.com
5.98.88.129	A	host129-88-static.98-5-b.business.telecomitalia.it
5.98.88.226	PTR	host-5-98-88-226.business.telecomitalia.it
5.98.89.138	A	mail.montiemonti.com
5.98.89.138	A	mail.montiemontispa.com
5.98.89.138	A	mail.avantgardsrl.com
5.98.89.203	A	mail.fonderiaeuropress.com
5.98.90.123	A	remote.3asistemi.it
5.98.90.123	A	3asistemi.it
5.98.90.123	A	mx1.3asistemi.it
5.98.91.76	A	host76-91-static.98-5-b.business.telecomitalia.it
5.98.91.202	A	mail.utensilcuscinetti.eu
5.98.91.202	A	mail.utensilcuscinetti.com
5.98.92.91	A	mail.olympiadinav.com
5.98.92.91	A	mx.olympiadinav.com
5.98.92.227	PTR	host227-92-static.98-5-b.business.telecomitalia.it
5.98.92.227	A	mail.deasnet.it
5.98.93.158	A	mail07.cermag.it
5.98.93.158	A	mail07.cermag.com
5.98.94.18	A	mail.uispfe.it
5.98.94.178	A	aerodogana.com
5.98.94.178	A	mail.aerodogana.com
5.98.95.20	A	mx.azzurraravenna.it
5.98.95.146	A	mail2.bacchi.it