If I have a MAC represented as:
is that the same as:
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You would add the leading zeros, not repeat single characters (so
Chances are that the application in question just didn't format its output correctly with the leading zeros.
irb(main):003:0> sprintf '%X', 11 => "B" irb(main):004:0> sprintf '%02X', 11 => "0B"
If you wanted to (somewhat) verify this, you could use a MAC lookup tool to check the manufacturer of the device.
According to MAC_Find, the
00:0b:23 prefix belongs to "Siemens Subscriber Network", while the other one is unknown. That's not 100% proof of anything, but if you know the device is a Siemens device, that would be enough verification for most cases.