Robtex

Up: 50.58.8.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 50.58.8.0/23
Down right: 50.58.10.0/23

IP	Type	Hostname
50.58.8.13	A	ns1.onefiserv.com
50.58.8.14	A	ns2.onefiserv.com
50.58.8.90	A+PTR	dm-morasp-dr.fiservapps.com
50.58.8.116	A+PTR	ftp.billmatrix.com
50.58.9.2	PTR	lvqodc01.onefiserv.com
50.58.9.3	A+PTR	lvqota01.onefiserv.com
50.58.9.11	A+PTR	inbd-pstfx-lv.customercenter.net
50.58.9.13	A+PTR	ns4.onefiserv.com
50.58.9.15	PTR	outbd3-pstfx.customercenter.net
50.58.9.16	A+PTR	myaccounts-dr.onefiserv.com
50.58.9.17	PTR	rm-dr.onefiserv.com
50.58.9.41	A	samldr-navy.onefiserv.com
50.58.9.115	A+PTR	datadelivery-mft-dr.onefiserv.com
50.58.9.160	A+PTR	richchannel01-onpt01-dr.fiservapps.com
50.58.9.200	A+PTR	api.paybill.com
50.58.9.201	A+PTR	cap.paybill.com
50.58.9.203	A+PTR	paybill.com
50.58.10.151	A	mail4.fiserv.com
50.58.10.155	A	sfb-web-meet.fiservcommunications.com
50.58.10.155	A	sfb-web-app.fiservcommunications.com
50.58.10.155	A	sfb-dial-in.fiservcommunications.com
50.58.10.181	A	outlook2.fiserv.net