Robtex

Up: 193.28.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 193.28.13.0/25
Down right: 193.28.13.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
193.28.13.1	PTR	irb-108.rtr1-dtc1.as24875.net
193.28.13.3	A	mail02-tower11.nl.cleanport.com
193.28.13.4	A+PTR	mail03-tower11.nl.cleanport.com
193.28.13.6	A	mail05-tower11.nl.cleanport.com
193.28.13.7	A	mail06-tower11.nl.cleanport.com
193.28.13.16	A+PTR	dial-in-193-28-13-16.dyn.usa.cabletown.net
193.28.13.16	A	mail16-tower11.nl.cleanport.com
193.28.13.18	A+PTR	mail18-tower11.nl.cleanport.com
193.28.13.26	PTR	mail26-tower11.nl.cleanport.com
193.28.13.29	PTR	dial-in-193-28-13-29.dyn.usa.cabletown.net
193.28.13.29	A	mail29-tower01.nl.cleanport.com
193.28.13.37	A+PTR	mail37-tower01.nl.cleanport.com
193.28.13.44	A+PTR	server38-tower01.nl.cleanport.com
193.28.13.46	PTR	server36-tower01.nl.cleanport.com
193.28.13.62	PTR	dial-in-193-28-13-62.dyn.usa.cabletown.net
193.28.13.62	A	mx2.zendith.net
193.28.13.62	A	mobile2.itouchdesign.nl
193.28.13.65	PTR	irb-108.rtr1-dtc1.as24875.net
193.28.13.70	PTR	mailfilter.dari.nl
193.28.13.105	PTR	dial-in-193-28-13-105.dyn.usa.cabletown.net
193.28.13.126	A	tower12.nl.cleanport.com
193.28.13.129	PTR	irb-108.rtr1-dtc1.as24875.net
193.28.13.146	A+PTR	dial-in-193-28-13-146.dyn.usa.cabletown.net
193.28.13.148	A+PTR	dial-in-193-28-13-148.dyn.usa.cabletown.net
193.28.13.177	PTR	dial-in-193-28-13-177.dyn.usa.cabletown.net
193.28.13.193	PTR	irb-108.rtr1-dtc1.as24875.net
193.28.13.196	PTR	vsp-mx02.ateranetworks.com
193.28.13.196	A	mx02.ki-kampen.nl
193.28.13.196	A	mx2.bcgroup.nl
193.28.13.197	A	vsp-mail26.ateranetworks.com
193.28.13.198	A+PTR	vsp-mail27.ateranetworks.com
193.28.13.199	A+PTR	vsp-mail28.ateranetworks.com
193.28.13.200	A+PTR	vsp-mail29.ateranetworks.com
193.28.13.201	A+PTR	vsp-mail30.ateranetworks.com
193.28.13.202	A+PTR	vsp-mail31.ateranetworks.com
193.28.13.203	PTR	dial-in-193-28-13-203.dyn.usa.cabletown.net
193.28.13.203	A	vsp-mail32.ateranetworks.com
193.28.13.204	A+PTR	vsp-mail33.ateranetworks.com
193.28.13.205	A+PTR	vsp-mail34.ateranetworks.com
193.28.13.206	A+PTR	vsp-mail35.ateranetworks.com
193.28.13.207	A+PTR	vsp-mail36.ateranetworks.com
193.28.13.208	A+PTR	vsp-mail37.ateranetworks.com
193.28.13.209	A+PTR	vsp-mail38.ateranetworks.com
193.28.13.210	PTR	dial-in-193-28-13-210.dyn.usa.cabletown.net
193.28.13.210	A	vsp-mail39.ateranetworks.com
193.28.13.211	A	vsp-mail40.ateranetworks.com
193.28.13.212	A	vsp-mail41.ateranetworks.com
193.28.13.213	A	vsp-mail42.ateranetworks.com
193.28.13.214	A	vsp-mail43.ateranetworks.com
193.28.13.215	A	vsp-mail44.ateranetworks.com
193.28.13.216	PTR	dial-in-193-28-13-216.dyn.usa.cabletown.net
193.28.13.216	A	vsp-mail45.ateranetworks.com
193.28.13.217	A	vsp-mail46.ateranetworks.com
193.28.13.218	A	vsp-mail47.ateranetworks.com
193.28.13.219	A	vsp-mail48.ateranetworks.com
193.28.13.220	A	vsp-mail49.ateranetworks.com
193.28.13.221	PTR	dial-in-193-28-13-221.dyn.usa.cabletown.net
193.28.13.221	A	vsp-mail50.ateranetworks.com
193.28.13.222	PTR	dial-in-193-28-13-222.dyn.usa.cabletown.net
193.28.13.230	PTR	dial-in-193-28-13-230.dyn.usa.cabletown.net