this post was submitted on 21 Feb 2026
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Science Memes
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So if you plug the same device into a different network using the same port, it's the same MAC?
The device mac doesn't change unless mac randomization is on.
I hate that, as far as I know, on Android you can't choose the "randomized" MAC
You want to pick your own MAC? At least you can set it to not be random for a specific network.
Yes, by picking my own MAC as with my linux laptop I could share pre approved network access on both devices (although not at the same time)
And that is exactly why it's not allowed.
The MAC, at least as it was conceptualised (as they said, MAC randomisation etc. mess with this), is a unique identifier for that specific device. It doesn't change, and only one device has that specific MAC.
Or more specifically, that specific network adaptor, the hardware responsible for connecting to networks. So one computer might have multiple MACs if, for example, it has an Ethernet port and a wifi card.