I'm sorry to say that those MAC addresses look suspiciously like gibberish that someone typed out. Notably, many of them have the least significant bit of the first byte set. That is the "group" bit. That bit indicates that the MAC address is not for an individual network node, but rather a broadcast or multicast group. Setting that bit outside of very specific usages results in a non-functional network connection. No meaningful MAC address within this context would have that bit set.
Also, many of them have the 2nd LSB set/cleared. That's the "local" bit, that indicates whether or not the MAC address is globally unique or not. I would expect any programmatic "randomize my MAC" function would set that bit to 1. At least that bit won't have any affect on whether the network connection works or not, unlike the group bit.
I'm sorry to say that those MAC addresses look suspiciously like gibberish that someone typed out. Notably, many of them have the least significant bit of the first byte set. That is the "group" bit. That bit indicates that the MAC address is not for an individual network node, but rather a broadcast or multicast group. Setting that bit outside of very specific usages results in a non-functional network connection. No meaningful MAC address within this context would have that bit set.
Also, many of them have the 2nd LSB set/cleared. That's the "local" bit, that indicates whether or not the MAC address is globally unique or not. I would expect any programmatic "randomize my MAC" function would set that bit to 1. At least that bit won't have any affect on whether the network connection works or not, unlike the group bit.
Thanks for this extra level of detail. I didn't know about the IG stuff! https://packetsdropped.wordpress.com/2011/01/13/mac-address-universally-or-locally-administered-bit-and-individualgroup-bit/