Robtex

Up: 216.130.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.130.52.0/23
Down right: 216.130.54.0/23

IP	Type	Hostname
216.130.52.10	PTR	cust-216-130-52-10.dsl.datavo.com
216.130.52.43	PTR	cust-216-130-52-43.dsl.datavo.com
216.130.52.91	PTR	cust-216-130-52-91.dsl.datavo.com
216.130.52.225	PTR	cust-216-130-52-225.dsl.datavo.com
216.130.52.239	PTR	cust-216-130-52-239.dsl.datavo.com
216.130.53.96	PTR	cust-216-130-53-96.dsl.datavo.com
216.130.53.225	PTR	cust-216-130-53-225.dsl.datavo.com
216.130.54.155	PTR	cust-216-130-54-155.dsl.datavo.com
216.130.54.230	PTR	cust-216-130-54-230.dsl.datavo.com
216.130.55.1	PTR	cust-216-130-55-1.dsl.datavo.com
216.130.55.42	PTR	cust-216-130-55-42.dsl.datavo.com
216.130.55.85	PTR	cust-216-130-55-85.dsl.datavo.com
216.130.55.90	PTR	cust-216-130-55-90.dsl.datavo.com