Robtex

Up: 216.52.72.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 216.52.73.0/25
Down right: 216.52.73.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.52.73.16	PTR	us3-smtp1.zoho.com
216.52.73.17	PTR	us3-smtp2.zoho.com
216.52.73.18	PTR	us3-smtp3.zoho.com
216.52.73.31	PTR	ns5.vtitan.com
216.52.73.32	PTR	mail-p2.medicalmine.com
216.52.73.33	PTR	mail-p3.medicalmine.com
216.52.73.55	A	mail2.94division.com
216.52.73.55	A	mx2.sahar.dk
216.52.73.55	A	dc-dd2d88177030.guiamaster.com.br
216.52.73.56	PTR	zm-apps2.zoho.com
216.52.73.57	PTR	mx2.zohocorp.com
216.52.73.64	PTR	sendera64.zcsend.net
216.52.73.65	PTR	sendera65.zcsend.net
216.52.73.66	PTR	sendera66.zcsend.net
216.52.73.67	PTR	sendera67.zcsend.net
216.52.73.68	PTR	sendera68.zcsend.net
216.52.73.69	PTR	sendera69.zcsend.net
216.52.73.69	A	www.zohoplatform.com
216.52.73.70	PTR	sendera70.zcsend.net
216.52.73.71	PTR	sendera71.zcsend.net
216.52.73.72	PTR	sendera72.zcsend.net
216.52.73.73	PTR	sendera73.zcsend.net
216.52.73.74	PTR	sendera74.zcsend.net
216.52.73.75	PTR	sendera75.zcsend.net
216.52.73.76	A+PTR	sendera76.zcsend.net
216.52.73.76	A	zohobackstage.com
216.52.73.77	A+PTR	sendera77.zcsend.net
216.52.73.78	PTR	sendera78.zcsend.net
216.52.73.79	A+PTR	sendera79.zcsend.net
216.52.73.80	A+PTR	sendera80.zcsend.net
216.52.73.81	A+PTR	sendera81.zcsend.net
216.52.73.82	A+PTR	sendera82.zcsend.net
216.52.73.83	A+PTR	sendera83.zcsend.net
216.52.73.84	A+PTR	sendera84.zcsend.net
216.52.73.85	A+PTR	sendera85.zcsend.net
216.52.73.86	PTR	sendera86.zcsend.net
216.52.73.87	A+PTR	sendera87.zcsend.net
216.52.73.88	A+PTR	sendera88.zcsend.net
216.52.73.89	A+PTR	sendera89.zcsend.net
216.52.73.90	A+PTR	sendera90.zcsend.net
216.52.73.91	A+PTR	sendera91.zcsend.net
216.52.73.92	A+PTR	sendera92.zcsend.net
216.52.73.92	A	zohocreatorplatform.com
216.52.73.93	A+PTR	sendera93.zcsend.net
216.52.73.94	A+PTR	sendera94.zcsend.net
216.52.73.95	PTR	sendera95.zcsend.net
216.52.73.142	A	assistfus-dal3.zoho.com
216.52.73.164	A	zohocrm.co.uk
216.52.73.186	A	zcrmemailverifier.com
216.52.73.192	A+PTR	sendera192.transmail.net
216.52.73.193	PTR	sendera193.transmail.net
216.52.73.194	A+PTR	sendera194.transmail.net
216.52.73.195	A+PTR	sendera195.transmail.net
216.52.73.196	A+PTR	sendera196.transmail.net
216.52.73.197	A+PTR	sendera197.transmail.net
216.52.73.198	A+PTR	sendera198.transmail.net
216.52.73.199	PTR	sendera199.transmail.net
216.52.73.200	A+PTR	sendera200.transmail.net
216.52.73.201	PTR	sendera201.transmail.net
216.52.73.202	A+PTR	sendera202.transmail.net
216.52.73.203	A+PTR	sendera203.transmail.net
216.52.73.204	A+PTR	sendera204.transmail.net
216.52.73.205	A+PTR	sendera205.transmail.net
216.52.73.206	A+PTR	sendera206.transmail.net
216.52.73.207	A+PTR	sendera207.transmail.net