Is it possible to receive iBeacon radio waves without specifying a UUID?

Previously, we developed an application to detect REBL600FR as an iBeacon transmitter.
Failed to scan for advertisement packets using CoreBluetooth.framework.
The major, minor values were also detected.

Note: We have developed an iOS app that detects REBL600FR!
http://grandbig.github.io/blog/2015/02/08/bl600sample2/

Note: I tried changing the outgoing parameters of REBL600FR on iOS app!
http://grandbig.github.io/blog/2015/02/11/bl600sample3/

I don't know if it can be done in the same way, but why don't you try it?
(However, the MyBeacon sold by Aplix could not be detected due to security.)

Beacons are Bluetooth devices, so you can scan them using the CoreBluetooth API.

…but It looks like you can't get information as a beacon from a found device.

"There is an app called ""BLEXplr"", so it is technically possible."

CoreBluetooth does not accept beacons.
Apple handles beacons as location information, so once you receive the beacon with CoreBluetooth, you will be able to retrieve location information without user confirmation of location information.

There is no way to specify a UUID in CoreLocation.