Robtex

Up: 31.148.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 31.148.52.0/23
Down right: 31.148.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.148.54.1	PTR	static-31-148-54-1.netbynet.ru
31.148.54.2	PTR	static-31-148-54-2.netbynet.ru
31.148.54.52	PTR	static-31-148-54-52.netbynet.ru
31.148.54.77	PTR	static-31-148-54-77.netbynet.ru
31.148.54.91	PTR	pppoe91.net31-148-54.se1.omkc.ru
31.148.54.182	PTR	static-31-148-54-182.netbynet.ru
31.148.54.182	A	ioohhssndnd.com
31.148.54.195	A	givenwithallliccoderigt.com
31.148.54.197	PTR	static-31-148-54-197.netbynet.ru
31.148.54.233	PTR	static-31-148-54-233.netbynet.ru
31.148.54.233	A	b.jadriport.at
31.148.54.242	PTR	static-31-148-54-242.netbynet.ru
31.148.55.44	PTR	static-31-148-55-44.netbynet.ru
31.148.55.48	PTR	static-31-148-55-48.netbynet.ru
31.148.55.108	PTR	static-31-148-55-108.netbynet.ru
31.148.55.115	PTR	static-31-148-55-115.netbynet.ru
31.148.55.126	PTR	static-31-148-55-126.netbynet.ru
31.148.55.130	PTR	static-31-148-55-130.netbynet.ru
31.148.55.159	PTR	static-31-148-55-159.netbynet.ru
31.148.55.184	PTR	static-31-148-55-184.netbynet.ru
31.148.55.223	PTR	static-31-148-55-223.netbynet.ru
31.148.55.241	PTR	static-31-148-55-241.netbynet.ru
31.148.55.241	A	d.dioddn.at
31.148.55.241	A	a.dioddn.at