WiFi MAC address returns "strange" values

Question

Hi everyone.

I am using Jacob as a bridge between my Java code and WMI (I don't want to write native code). I can query the access point for its MAC address and the reply is returned successfully. But...

Instead of getting a regular MAC address xx:xx:xx:xx:xx:xx, I get a value like the following (the numbers are random):

-95 114 54 -67 56 34

I don't know if this the NIC's fault or it is a default operation.  

Honestly, I keep searching on the web but I cannot understand what is this. If anyone knows, I would be grateful to know.

Answer 1

There is also another issue that I just noticed. I am definitely sure that I connect to one and only AP each time (there are no more available at this place) and I get 3-4 different values each time I connect.

The first three decimal number are always the same (manufacturer), but the rest changes randomly between these values.