Robtex

Up: 31.133.64.0/19
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Down left: 31.133.64.0/21
Down right: 31.133.72.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.133.64.0	PTR	pool-31-133-64-0.optima-east.net
31.133.64.146	PTR	pool-31-133-64-146.optima-east.net
31.133.64.210	PTR	pool-31-133-64-210.optima-east.net
31.133.65.195	PTR	pool-31-133-65-195.optima-east.net
31.133.67.10	PTR	pool-31-133-67-10.optima-east.net
31.133.67.48	PTR	pool-31-133-67-48.optima-east.net
31.133.67.174	PTR	pool-31-133-67-174.optima-east.net
31.133.67.195	PTR	pool-31-133-67-195.optima-east.net
31.133.68.18	PTR	pool-31-133-68-18.optima-east.net
31.133.68.82	PTR	pool-31-133-68-82.optima-east.net
31.133.69.193	PTR	pool-31-133-69-193.optima-east.net
31.133.69.193	A	fredistrgrrigdevelopment.ru
31.133.69.240	PTR	pool-31-133-69-240.optima-east.net
31.133.71.115	PTR	pool-31-133-71-115.optima-east.net
31.133.72.1	PTR	pool-31-133-72-1.optima-east.net
31.133.72.33	PTR	pool-31-133-72-33.optima-east.net
31.133.72.62	PTR	pool-31-133-72-62.optima-east.net
31.133.72.246	PTR	pool-31-133-72-246.optima-east.net
31.133.73.80	PTR	pool-31-133-73-80.optima-east.net
31.133.74.27	A	hardfusion.online
31.133.74.97	PTR	pool-31-133-74-97.optima-east.net
31.133.74.241	PTR	pool-31-133-74-241.optima-east.net
31.133.75.211	PTR	pool-31-133-75-211.optima-east.net
31.133.75.221	A	translingnease.net
31.133.75.239	A	dns2.flydyns.ru
31.133.75.239	A	dns1.flydyns.ru
31.133.75.239	A	dns3.flydyns.ru
31.133.75.241	PTR	pool-31-133-75-241.optima-east.net
31.133.76.51	A	ns1.deosli.at
31.133.76.115	PTR	pool-31-133-76-115.optima-east.net
31.133.76.238	A	dns4.jobsame.ru
31.133.76.238	A	dns2.jobsame.ru
31.133.76.238	A	dns3.jobsame.ru
31.133.77.17	PTR	pool-31-133-77-17.optima-east.net
31.133.78.3	A	weoitnasdeeww.net
31.133.78.178	PTR	pool-31-133-78-178.optima-east.net
31.133.79.17	PTR	pool-31-133-79-17.optima-east.net