Robtex

Up: 83.147.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 83.147.17.0/25
Down right: 83.147.17.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
83.147.17.39	PTR	mail.esp2-44.news.msqdesc.es
83.147.17.59	PTR	mail.esp2-64.news.msqdesc.es
83.147.17.101	PTR	mail.esp2-106.news.rebyms.es
83.147.17.137	PTR	mail.esp2-142.news.mrlafta.es
83.147.17.160	A+PTR	hst349.otspoetry.com
83.147.17.160	A	mail.railgov.com
83.147.17.160	A	railgov.com
83.147.17.176	PTR	mail.sea337.kelliem.com
83.147.17.176	A	mail.sea.uracers.com
83.147.17.176	A	mail.sea.haihui56.com
83.147.17.202	PTR	mail.esp2-207.ds.carantasia.es