Very nice UI! If you're looking for something similar via an API you can try my service http://ipinfo.io:

    $ curl ipinfo.io/8.8.8.8
    {
      "ip": "8.8.8.8",
      "hostname": "google-public-dns-a.google.com",
      "city": "Mountain View",
      "region": "California",
      "country": "US",
      "loc": "37.3845,-122.0881",
      "org": "AS15169 Google Inc.",
      "postal": "94040"
    }

    $ curl ipinfo.io/8.8.8.8/org
    AS15169 Google Inc.
    

It also supports lookup of IPv6 addresses (but not IPv6 connections, due to AWS). See http://ipinfo.io/about for more details