Robtex

Up: 64.59.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 64.59.0.0/19
Down right: 64.59.32.0/19
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.59.0.34	A	mail.test123.com
64.59.0.66	A	obiwan.pageup.net
64.59.0.66	A	ns2.pageup.net
64.59.1.1	PTR	x403b0101.ip.e-nt.net
64.59.1.128	PTR	x403b0180.ip.e-nt.net
64.59.3.142	A	mail.admodus.com
64.59.3.142	A	mx1.admodus.com
64.59.5.67	A	s1.ns-rec.isp.nyc1.eggn.net
64.59.5.97	A	nsold2.ggn.net
64.59.5.97	A	ns2.elinkisp.com
64.59.5.97	A	ns-auth.isp.nyc1.eggn.net
64.59.5.157	A	x403b059d.ip.e-nt.net
64.59.6.3	PTR	x403b0603.ip.e-nt.net
64.59.6.64	PTR	x403b0640.ip.e-nt.net
64.59.6.65	PTR	x403b0641.ip.e-nt.net
64.59.6.66	PTR	x403b0642.ip.e-nt.net
64.59.6.192	PTR	x403b06c0.ip.e-nt.net
64.59.7.93	A	x403b075d.ip.e-nt.net
64.59.8.34	A	mail2.mmsppm.com
64.59.9.0	PTR	x403b0900.ip.e-nt.net
64.59.9.2	A	x403b0902.ip.e-nt.net
64.59.9.16	A	x403b0910.ip.e-nt.net
64.59.9.20	A	x403b0914.ip.e-nt.net
64.59.9.65	A	x403b0941.ip.e-nt.net
64.59.9.72	A	x403b0948.ip.e-nt.net
64.59.9.108	A	x403b096c.ip.e-nt.net
64.59.9.157	A	x403b099d.ip.e-nt.net
64.59.9.179	A	x403b09b3.ip.e-nt.net
64.59.9.193	PTR	x403b09c1.ip.e-nt.net
64.59.9.220	A	x403b09dc.ip.e-nt.net
64.59.10.146	A	mail.castletonpartners.com
64.59.10.192	PTR	x403b0ac0.ip.e-nt.net
64.59.11.128	PTR	x403b0b80.ip.e-nt.net
64.59.11.192	PTR	x403b0bc0.ip.e-nt.net
64.59.12.154	A	smtp.dglaw.mobi
64.59.12.154	A	mx.dglaw.mobi
64.59.12.154	A	pop.dglaw.mobi
64.59.13.164	A	x403b0da4.ip.e-nt.net
64.59.14.10	A	mail3.glblumberg.com
64.59.14.156	A	cagner.com
64.59.15.0	PTR	x403b0f00.ip.e-nt.net
64.59.15.129	PTR	x403b0f81.ip.e-nt.net
64.59.15.131	PTR	x403b0f83.ip.e-nt.net
64.59.16.4	A	findindustrialsupplies.net
64.59.16.156	A	x403b109c.ip.e-nt.net
64.59.17.146	A	x403b1192.ip.e-nt.net
64.59.18.162	A	mail.fruchtertwersky.com
64.59.18.162	A	fruchtertwersky.com
64.59.18.162	A	mail.abrahamlaw.com
64.59.18.186	A	mail.steinaiken.com
64.59.19.11	A	mail.spa-booker.com
64.59.21.36	A	wap.netsol.com
64.59.21.77	A	x403b154d.ip.e-nt.net
64.59.21.95	A	x403b155f.ip.e-nt.net
64.59.21.123	A	www.happy0572.com
64.59.21.123	A	happy0572.com
64.59.23.128	PTR	x403b1780.ip.e-nt.net
64.59.26.245	A	pop.liststrategies.com
64.59.26.247	A	mailsrv.liststrategies.com
64.59.26.248	A	mailsrv2.liststrategies.com
64.59.30.0	PTR	x403b1e00.ip.e-nt.net
64.59.30.114	A	firewall.hluce.org
64.59.30.118	A	clarebootheluce.org
64.59.30.119	A	lucescholars.org
64.59.30.128	PTR	x403b1e80.ip.e-nt.net
64.59.31.7	A	d.privprotect.ml
64.59.31.7	A	e.privprotect.ml
64.59.31.7	A	a.anopost.ga
64.59.31.131	A	mail.walkerbooks.com
64.59.32.26	A	mail2.marinelex.com
64.59.32.130	PTR	x403b2082.ip.e-nt.net
64.59.34.2	PTR	x403b2202.ip.e-nt.net
64.59.34.66	PTR	x403b2242.ip.e-nt.net
64.59.34.194	PTR	ns1432.ztomy.com
64.59.34.195	PTR	x403b22c3.ip.e-nt.net
64.59.35.195	PTR	x403b23c3.ip.e-nt.net
64.59.35.227	A	x403b23e3.ip.e-nt.net
64.59.36.2	PTR	nycexch.dowusa.org
64.59.36.64	PTR	x403b2440.ip.e-nt.net
64.59.36.65	PTR	ns1432.ztomy.com
64.59.36.192	PTR	x403b24c0.ip.e-nt.net
64.59.36.193	PTR	x403b24c1.ip.e-nt.net
64.59.36.195	PTR	x403b24c3.ip.e-nt.net
64.59.36.234	A	mail.northhillcapital.com
64.59.36.234	A	dcmail.northhillcapital.com
64.59.36.234	A	nh-funds.com
64.59.41.138	A	mail.hrminc.us
64.59.41.138	A	mail.fostermckayny.com
64.59.41.138	A	mail.capstonepartnership.com
64.59.43.11	A	mail.irts.org
64.59.44.11	A	mail.echocap.com
64.59.45.130	PTR	x403b2d82.ip.e-nt.net
64.59.45.130	A	vineberg.net
64.59.45.147	A	mail.bluewaterwind.com
64.59.45.195	A	flypmail.flypmedia.com
64.59.45.196	A	zemimail.zemi.com
64.59.46.82	A	mail1.kphwlaw.com
64.59.46.82	A	mail.kphwlaw.com
64.59.46.166	A	milso.com
64.59.47.228	A	mx1.rosiesbroadwaykids.org
64.59.50.78	A	trinitymgrs.com
64.59.50.130	PTR	mail.rothproductions.com
64.59.50.130	A	rothproductions.com
64.59.51.40	A	mail.aeelaw.com
64.59.51.40	A	*.aeelaw.com
64.59.51.202	A	smtp1.lagibbs.com
64.59.54.130	PTR	x403b3682.ip.e-nt.net
64.59.54.195	PTR	x403b36c3.ip.e-nt.net
64.59.57.1	PTR	x403b3901.ip.e-nt.net
64.59.57.2	PTR	ns1432.ztomy.com
64.59.57.3	PTR	x403b3903.ip.e-nt.net
64.59.58.64	PTR	x403b3a40.ip.e-nt.net
64.59.58.65	PTR	x403b3a41.ip.e-nt.net
64.59.58.129	PTR	x403b3a81.ip.e-nt.net
64.59.58.193	PTR	x403b3ac1.ip.e-nt.net
64.59.59.107	A	x403b3b6b.ip.e-nt.net
64.59.60.128	PTR	x403b3c80.ip.e-nt.net
64.59.61.54	A	apparelwinds.com
64.59.62.131	A	mail.wolfmaryles.com
64.59.63.1	PTR	x403b3f01.ip.e-nt.net
64.59.63.64	PTR	x403b3f40.ip.e-nt.net
64.59.63.65	PTR	x403b3f41.ip.e-nt.net
64.59.63.128	PTR	x403b3f80.ip.e-nt.net
64.59.63.190	A	x403b3fbe.ip.e-nt.net
64.59.63.192	PTR	x403b3fc0.ip.e-nt.net
64.59.63.193	PTR	x403b3fc1.ip.e-nt.net
64.59.63.194	PTR	x403b3fc2.ip.e-nt.net