What happened?

Hacking group AntiSec breached FBI security and discovered that the FBI has a list of over 12 million UDIDs from iOS devices. It isn't yet clear why the FBI are collecting UDIDs. AntiSec has released part of the list online. More information can be found at Mac Rumors here.

Is mine in there?

To check if your UDID appears in the list that was leaked just enter it in the box below and click the 'Check' button. To find your UDID follow the steps here.