Robtex

Up: 216.162.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 216.162.100.0/23
Down right: 216.162.102.0/23

IP	Type	Hostname
216.162.100.178	PTR	216-162-100-178.swtexas.net
216.162.101.150	PTR	216-162-101-150.swtexas.net
216.162.101.247	PTR	216-162-101-247.swtexas.net
216.162.102.113	PTR	216-162-102-113.swtexas.net
216.162.102.145	PTR	216-162-102-145.swtexas.net
216.162.102.191	PTR	216-162-102-191.swtexas.net
216.162.102.215	PTR	216-162-102-215.swtexas.net
216.162.103.45	PTR	216-162-103-45.swtexas.net
216.162.103.54	PTR	216-162-103-54.swtexas.net
216.162.103.99	PTR	216-162-103-99.swtexas.net
216.162.103.108	PTR	216-162-103-108.swtexas.net
216.162.103.248	PTR	216-162-103-248.swtexas.net