Find network prefix length for Android Galaxy Note

If you know the subnet mask, it can be translated by these values:

 255.255.255.255 = 32

 255.255.255.0 = 24

 255.255.128.0 = 17

 255.255.0.0 = 16

 255.0.0.0 = 8

More about subnet masks and prefix lengths here: http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_9-1/ip_addresses.html