Robtex

Up: 216.87.48.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 216.87.50.0/24
Down right: 216.87.51.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
216.87.50.34	A	stl-dsl-02.primary.net
216.87.50.64	PTR	metroheart.com
216.87.50.65	PTR	metroheart.com
216.87.50.66	PTR	metroheart.com
216.87.50.67	PTR	metroheart.com
216.87.50.68	PTR	metroheart.com
216.87.50.69	PTR	metroheart.com
216.87.50.70	PTR	metroheart.com
216.87.50.72	PTR	metroheart.com
216.87.50.73	PTR	metroheart.com
216.87.50.74	PTR	metroheart.com
216.87.50.75	PTR	metroheart.com
216.87.50.76	PTR	metroheart.com
216.87.50.77	PTR	metroheart.com
216.87.50.78	PTR	metroheart.com
216.87.50.79	PTR	metroheart.com
216.87.50.80	PTR	metroheart.com
216.87.50.81	PTR	metroheart.com
216.87.50.82	PTR	metroheart.com
216.87.50.83	PTR	metroheart.com
216.87.50.84	PTR	metroheart.com
216.87.50.85	PTR	metroheart.com
216.87.50.86	PTR	metroheart.com
216.87.50.87	PTR	metroheart.com
216.87.50.88	PTR	metroheart.com
216.87.50.89	PTR	metroheart.com
216.87.50.90	PTR	metroheart.com
216.87.50.91	PTR	metroheart.com
216.87.50.92	PTR	metroheart.com
216.87.50.93	PTR	metroheart.com
216.87.50.94	PTR	metroheart.com
216.87.50.103	A	mx2.childrenshope.net
216.87.50.139	PTR	mail.dfcab.com
216.87.50.230	PTR	svi.primary.net
216.87.51.2	PTR	envision.com
216.87.51.75	PTR	static-216.87.51.75.primary.net
216.87.51.75	A	politiview.com
216.87.51.75	A	caresandcures.com
216.87.51.76	A	stpeterschoolkirkwood.org
216.87.51.76	A	macmedical.com
216.87.51.77	PTR	static-216.87.51.77.primary.net
216.87.51.77	A	engageemail.com
216.87.51.77	A	mail.richcampbell.net