Robtex

Up: 217.31.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 217.31.236.0/23
Down right: 217.31.238.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
217.31.236.0	PTR	host142782400.vodafone.com.tr
217.31.236.54	PTR	host142782454.vodafone.com.tr
217.31.236.71	PTR	host142782471.vodafone.com.tr
217.31.236.158	PTR	host142782558.vodafone.com.tr
217.31.236.158	A	btkspd02.vodafone.com.tr
217.31.236.205	PTR	host142782605.vodafone.com.tr
217.31.237.17	PTR	host147072017.vodafone.com.tr
217.31.237.37	PTR	host147072037.vodafone.com.tr
217.31.237.102	A+PTR	redcloud.vodafone.com.tr
217.31.237.135	PTR	host147072135.vodafone.com.tr
217.31.237.135	A	ns.akillibaskonus.com
217.31.237.135	A	mail.akillibaskonus.com
217.31.237.137	PTR	host147072137.vodafone.com.tr
217.31.237.166	PTR	host147072166.vodafone.com.tr
217.31.237.197	A+PTR	st01.vodafone.com.tr
217.31.237.198	A	st02.vodafone.com.tr
217.31.238.1	PTR	host147929921.vodafone.com.tr
217.31.238.63	PTR	host147929983.vodafone.com.tr
217.31.238.70	PTR	host147929990.vodafone.com.tr
217.31.238.103	PTR	host147930023.vodafone.com.tr
217.31.238.129	PTR	host147930049.vodafone.com.tr
217.31.238.133	PTR	host147930053.vodafone.com.tr
217.31.239.0	PTR	host148297600.vodafone.com.tr
217.31.239.2	PTR	host148297602.vodafone.com.tr
217.31.239.86	PTR	host148297686.vodafone.com.tr
217.31.239.189	PTR	host148297789.vodafone.com.tr
217.31.239.230	PTR	host148297830.vodafone.com.tr
217.31.239.239	PTR	host148297839.vodafone.com.tr
217.31.239.240	PTR	host148297840.vodafone.com.tr
217.31.239.255	PTR	host148297855.vodafone.com.tr