How can be the secure UUID tested?

Hi,

I created an iOS application that uses the secure UUID function (with iBeacon protocol).

How often do the randomized IDs change?

I would like to test whether the broadcasted IDs change. Does someone know how to prove this? I am looking for a tool that can catch the BLE packets and show the UUID-Major-Minor values. (something like Wireshark for the Wireless communication)