Robtex

Up: 135.84.80.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 135.84.80.0/25
Down right: 135.84.80.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
135.84.80.1	A+PTR	sendera1.transmail.net
135.84.80.27	A+PTR	sendera27.transmail.net
135.84.80.58	A+PTR	system-58.transmail.net
135.84.80.79	A+PTR	system-79.transmail.net
135.84.80.80	PTR	system-80.transmail.net
135.84.80.88	A+PTR	system-88.transmail.net
135.84.80.127	A+PTR	app-127.transmail.net
135.84.80.129	PTR	sendgrid2.zoho.com
135.84.80.129	A	resmidenatureindonesia.zohosites.com
135.84.80.129	A	megatradeinvestmentltd.zohosites.com
135.84.80.130	A	www.smaaa.church
135.84.80.130	A	www.onyxtechservices.com
135.84.80.130	A	www.voicesoftoday.net
135.84.80.131	A+PTR	sendgrid4.zoho.com
135.84.80.133	A+PTR	sendgrid6.zoho.com
135.84.80.135	A+PTR	sendgrid8.zoho.com
135.84.80.139	A+PTR	sendgrid12.zoho.com
135.84.80.140	A+PTR	sendgrid13.zoho.com
135.84.80.178	PTR	sendera178.zohocrm.com
135.84.80.181	A+PTR	sendera181.zohocreator.com
135.84.80.184	A+PTR	sendera184.zohocrm.com
135.84.80.185	A+PTR	sendera185.zohocrm.com
135.84.80.186	A+PTR	sendera186.zohocrm.com
135.84.80.187	A+PTR	sendera187.zohocrm.com
135.84.80.189	A+PTR	sendera189.zohocrm.com
135.84.80.193	A+PTR	sender-c7.zoho.com
135.84.80.194	A+PTR	sender.zoho.com
135.84.80.196	A+PTR	sender-op-o11.zoho.com
135.84.80.197	A+PTR	sender-op-o12.zoho.com
135.84.80.198	A+PTR	sender-op-o13.zoho.com
135.84.80.216	A+PTR	sender-of-o51.zoho.com
135.84.80.216	A	lokocampers.co.uk
135.84.80.217	A+PTR	sender-of-o52.zoho.com
135.84.80.217	A	theinfomation4s.com
135.84.80.218	A+PTR	sender-of-o53.zoho.com
135.84.80.226	A+PTR	sender-of-f71.zoho.com
135.84.80.226	A	site24x7.enduserexp.com
135.84.80.236	A+PTR	sender-pp-091.zoho.com
135.84.80.237	A+PTR	sender-pp-092.zoho.com
135.84.80.237	A	sender-pp-o92.zoho.com
135.84.80.238	A+PTR	sender-pp-093.zoho.com
135.84.80.240	A+PTR	sender-co9.zoho.com
135.84.80.254	A+PTR	sender-zs8.zoho.com