Robtex

Up: 173.234.64.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 173.234.64.0/22
Down right: 173.234.68.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.234.64.0	PTR	173.234.64.0.rdns.ubiquityservers.com
173.234.65.0	A	mail.halfanarmmarketing.com
173.234.65.0	A	halfanarmmarketing.com
173.234.65.8	PTR	234.vg
173.234.65.34	PTR	173.234.65.34.rdns.ubiquityservers.com
173.234.65.34	A	serv.gamers-forum.com
173.234.65.37	A	mail.sheikyermami.com
173.234.65.128	PTR	173-234-65-128.rdns.ubiquityservers.com
173.234.65.128	A	ns2.gamers-forum.com
173.234.65.128	A	gamers-forum.com
173.234.65.192	A	mx.justcallgreg.net
173.234.65.193	PTR	petcoportraits.com
173.234.65.193	A	elkslodge1419.com
173.234.65.193	A	justcallgreg.net
173.234.65.206	A	erieinsurances.com
173.234.65.206	A	mail.thesmellingsaucemediagroup.com
173.234.65.206	A	thesmellingsaucemediagroup.com
173.234.67.41	PTR	173.234.67.41.rdns.ubiquityservers.com
173.234.69.48	PTR	173-234-69-48.rdns.bravohost.net
173.234.69.64	A	orange-marketing.net
173.234.69.64	A	mail.orange-marketing.net
173.234.69.80	PTR	ns102.cpqdns.com
173.234.69.84	A	ella-lapetiteanglaise.com
173.234.69.194	PTR	173-234-69-194.mobile.mymode.net
173.234.69.195	PTR	173-234-69-195.mobile.mymode.net
173.234.69.209	PTR	173-234-69-209.mobile.mymode.net
173.234.69.227	PTR	173-234-69-227.mobile.mymode.net
173.234.69.235	PTR	173-234-69-235.mobile.mymode.net
173.234.69.240	PTR	173-234-69-240.mobile.mymode.net
173.234.69.243	PTR	173-234-69-243.mobile.mymode.net
173.234.70.126	A	weddingbands123.com
173.234.70.126	A	vipengagementrings.com
173.234.70.126	A	mail.vipengagementrings.com
173.234.70.193	PTR	us.newyork.wizard.systembs.com
173.234.70.194	A+PTR	25199.vz026.ubiquityservers.com
173.234.70.194	A	idolmag.co.uk