Robtex

Up: 129.220.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 129.220.128.0/18
Down right: 129.220.192.0/18

IP	Type	Hostname
129.220.253.5	A+PTR	autodiscover.unisyscustomer.com
129.220.253.5	A+PTR	mail.unisyscustomer.com
129.220.253.5	A+PTR	autodiscover.usc.unisys.com
129.220.253.6	PTR	cwa.unisyscustomer.com
129.220.253.6	A+PTR	cwa.usc.unisys.com
129.220.253.7	PTR	bescwa.usc.unisys.com
129.220.253.7	PTR	bescwa.unisyscustomer.com
129.220.253.8	PTR	rp.usc.unisys.com
129.220.253.8	PTR	rp.unisyscustomer.com
129.220.253.193	A+PTR	cloudv1.eservice.unisys.com
129.220.253.215	A+PTR	smtp.unisyscustomer.com
129.220.253.215	PTR	smtp.usc.unisys.com