Robtex

Up: 83.138.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 83.138.40.0/22
Down right: 83.138.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
83.138.40.1	A	router.atlasinternet.net
83.138.40.250	A+PTR	ns3.atlasinternet.net
83.138.41.9	A+PTR	roma.atlasinternet.net
83.138.41.9	A	mx1.atlasinternet.net
83.138.41.9	A	mx.atlasinternet.net
83.138.41.11	A	paris.atlasinternet.net
83.138.41.33	A+PTR	ns1.atlasinternet.net
83.138.41.34	A+PTR	ns2.atlasinternet.net
83.138.41.35	A+PTR	roma.atlasinternet.net
83.138.41.35	A	ns1.atlasinternet.es
83.138.41.36	PTR	ns1.atlasinternet.es
83.138.41.37	A	roma.atlasinternet.net
83.138.41.101	PTR	vm01.atlas.es
83.138.41.102	A	vm02.atlas.es
83.138.41.103	A+PTR	vm03.atlas.es
83.138.41.103	A	bctours.net
83.138.41.103	A	balearesconsignatarios.com
83.138.41.104	A+PTR	vm04.atlas.es
83.138.41.104	A	imap.marina-hotels.com
83.138.41.105	A	vm05.atlas.es
83.138.41.106	PTR	vm06.atlas.es
83.138.41.106	A	deluxe-mallorca.com
83.138.41.107	PTR	vm07.atlas.es
83.138.41.107	A	deluxe-mallorca.com
83.138.41.109	A	mx.atlasinternet.net
83.138.41.112	A+PTR	vm12.atlas.es
83.138.41.112	A	clinicarotger.es
83.138.41.112	A	toldosmiralles.com
83.138.41.115	PTR	vm15.atlas.es
83.138.41.115	A	dbalears.cat
83.138.41.116	A	dbalears.cat
83.138.41.117	A	dbalears.cat
83.138.41.118	A	dbalears.cat
83.138.41.119	A	dbalears.cat
83.138.41.119	A	ventaycambio.es
83.138.41.120	A+PTR	vm20.atlas.es
83.138.41.121	PTR	vm21.atlas.es
83.138.41.121	A	smtp.ilusionhotels.com
83.138.41.121	A	mx.voramarhomes.com
83.138.41.122	PTR	vm22.atlas.es
83.138.41.123	PTR	vm23.atlas.es
83.138.41.128	PTR	vm28.atlas.es
83.138.41.128	A	www.timonhotel.com
83.138.41.128	A	www.donmiguelhotel.com
83.138.41.130	A	vm30.atlas.es
83.138.41.130	A	banners.evoluhcion.es
83.138.41.131	PTR	vm31.atlas.es
83.138.41.131	A	banners.evoluhcion.es
83.138.41.140	PTR	vm40.atlas.es
83.138.41.140	A	bctours.net
83.138.41.201	A+PTR	lab01.atlas.es
83.138.41.208	A	lab08.atlas.es
83.138.41.230	A	ofertasenmallorca.com
83.138.41.250	A	setmanarisoller.com
83.138.41.250	A	saglosa.menorca.info
83.138.41.250	A	dbalears.cat