Crazy MAC address

[SpeedThree]

I have my Synology router set up to email me changes. Today I got this.

The device b4c2338a-1faf-475a-bdaa-d5d9e2858e62 is now connected to your Wi-Fi network GuestLANd.

From SynologyRouter

That is the strangest MAC address I have ever seen and when checked the MAC listing on the Router, no such device was listed.

Any feedback/advice would be more than welcome.

 

[ColinTaylor]

It's a Windows Device ID. See Settings > System > About.

 

[SpeedThree]

It's a Windows Device ID. See Settings > System > About.

Thanks for taking the time to answer, Colin!

I live in a tiny townhouse complex and happen to know that all of us are Mac computer users. Unless...does a Kindle reader count as a Windows Device?
Moreover, once I go to my router settings to see which devices are connected, the MAC address I mentioned does not appear .
This is all very confusing to say the least.

 

[ColinTaylor]

It's not a MAC address.

What you're seeing is called a "Device ID" in Windows. It's also known as a UUID. I don't know what the equivalent in macOS would be called.

Universally unique identifier - Wikipedia

en.wikipedia.org

 

[SpeedThree]

Thank you, Colin.
The alert from the Synology router said that UUID was connected to my wi-fi network but when I go to the router's Network Center > Status > Device List > Wi-Fi, I see eight devices connected, all of which I recognize.
Any idea of how you could find that device with the UUID in the router settings???

 

[ColinTaylor]

I don't know anything about Synology routers. But if you have mostly Apple devices Google says this:

How to Find your Mac, iPhone, and iPad’s UUID

Your Mac, iPhone, and iPad all have unique ways of identifying them. If a developer asks for your UUID, here's how to find it.

www.howtogeek.com

 

[SpeedThree]

Thank you for all your replies, Colin. I learned a lot from this exchange.

Always remembered this great line...
“I have always depended on the kindness of strangers.”
- Blanche DuBois A Streetcar Named Desire

 

[XIII]

I don't know anything about Synology routers. But if you have mostly Apple devices Google says this:

How to Find your Mac, iPhone, and iPad’s UUID

Your Mac, iPhone, and iPad all have unique ways of identifying them. If a developer asks for your UUID, here's how to find it.

www.howtogeek.com

Apple says this about it:

the UI displays the device ID as Hardware UUID (in macOS 10.15 and earlier) or Provisioning UDID (in macOS 11.0 and later).

Please note that such a Hardware UUID / UDID is not in the standard UUID format from the first post in this topic.

 

[sfx2000]

It's also known as a UUID

Just note that for most platforms, the UUID is ephemeral...

Because Privacy - the UUID is only used for a short period of time..

 

[ColinTaylor]

Just note that for most platforms, the UUID is ephemeral...

Because Privacy - the UUID is only used for a short period of time..

Yes if you follow the link in my post it explains that.