How to list Network Interface UUIDS?

I'm trying really hard to find a simple way to fetch all network UUIDS on my Mac to be able to do some plist magic.

Is there a command to do such a thing?

If I look in the plist I'll find for an instance "Service Order" ServiceOrder = Array { 2AF2313D-AB7E-4FE7-91C3-XXXXXXXXXXXX 9B976E4D-F7BE-428D-88C2-YYYYYYYYYYYY 9A26C39B-8BD4-4562-9E0A-ZZZZZZZZZZZZ

But is there a more simple way than just writing a long script deleting the parts before and after?

All computers running Yosemite