Robtex

Up: 64.6.18.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 64.6.18.0/25
Down right: 64.6.18.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
64.6.18.1	PTR	64-6-18-1.priceline.com
64.6.18.2	A	pricelinehotel.com
64.6.18.6	A	priceline-mortgage.com
64.6.18.6	A	mortgagepriceline.biz
64.6.18.6	A	priceline-mortgages.com
64.6.18.9	PTR	img1.priceline.com
64.6.18.9	PTR	origin-img1.priceline.com
64.6.18.14	PTR	www.mytravelguide.com
64.6.18.21	PTR	www.flexrez.com
64.6.18.24	PTR	travelweb.flexrez.com
64.6.18.26	A	pricelinegroups.com
64.6.18.35	PTR	www.airportrentalcars.com
64.6.18.38	PTR	secure.rezserver.com
64.6.18.39	PTR	www.hotelroom.com