Robtex

Up: 208.53.32.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 208.53.33.0/25
Down right: 208.53.33.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.53.33.27	PTR	208-53-33-27.c7dc.com
208.53.33.27	A	fictionwise.com
208.53.33.27	A	ereader.com
208.53.33.41	A	books.barnesandnoble.com
208.53.33.50	PTR	208-53-33-50.c7dc.com
208.53.33.50	A	exchangestreet.com
208.53.33.51	PTR	208-53-33-51.c7dc.com
208.53.33.51	A	www.directnetsystems.com
208.53.33.118	PTR	208-53-33-118.c7dc.com
208.53.33.118	A	nookbooks.com
208.53.33.118	A	locatethebook.com
208.53.33.255	PTR	208-53-33-255.c7dc.com