My colleague, Kale, pointed out this nice whois server that presents data in a nice and easy to read format. Just run this:

whois -h whois.cymru.com " -v 72.32.231.8"

You will get a nice output like this (although it doesn't fit on my screen in this example):

AS      | IP               | BGP Prefix          | CC | Registry | Allocated  | AS Name
33070   | 72.32.231.8      | 72.32.0.0/16        | US | arin     | 2005-02-25 | RMH-14 – Rackspace.com, Ltd.