Amazon Device randomly showing up on Network.

After spending some time looking into this I have come to the conclusion its an Amazon service built into several of their products (FireTV device, FireTV built into TV, Kindle, Alexa, Echo, Alexa app, etc...) that identifies your exact location without using the common Location Services of your device (be it phone, PC, etc.).

Microsoft, Google, Amazon, Apple, etc. use a service that takes a snapshot of your wireless / wired network to zero in on location by cataloging your network plus any nearby network resources that your network can reach.

Doing this with your network and your neighbors network and their neighbors and their neighbors, etc. allows them to create a very accurate map of your location (capturing all the MAC addresses on your network plus ISP provided IP plus nearby MAC addresses makes it pretty easy to generate a map).

Stored in a database and updated when the service runs gives them your location (and a few other details) even when you have your local location service disabled, obscured or even if you try to fake your location.

Mine is called suez.

MAC starts with fc:a1:83:cc

...also:

even if you don't own any Amazon product directly many devices include Amazon apps. Whether you signup for the actual service, if the app is present its collecting data.

again, EVERY tech company is doing something similar.

Amazon/Google make ZERO apps for customers. They make apps that collect data for their profit.

I don't have an Echo, or anything like it, I'm not a Comcast subscriber (I'm in the UK), my PC is bespoke, and have had one of these spurious devices both before and after doing a complete reinstallation. I am currently blessed with a 'suez'.

I have a "suez" today.  Other names have popped up recently with similar Amazon info ("mantis" was one).

I currently (28nov2017) have the same issue. 

Just found a site which identifies this device as an Amazon Fire 7 2017 Tablet.

https://www.handsetdetection.com/properties/devices/Amazon/KFAUWI

Still don't know how they are on my network unless it's part of Comcast Xfinitys "Free" WiFi created by Comcast to allow others to use all paid subscribers networks when they are supposedly away from home. I have also seen an Amazon Echo on my network as well. And Comcast wants to Kill Net Neutrality! Neighbors I suspect!  

At last - something that might explain this device showing up. I have a Kindle Fire that is allowed access to my email, which might be the reason. My Fire recently updated its OS. I am also assured by visiting the links supplied in this Forum that it is not, in fact, a security issue.

I totally agree about not using WPS because it is a security risk and only saves you typing a WPA2-PSK(AES) key the first time you connect to a network.  WPS is definitely a solution in search of a non existing problem and in doing so has created more problems then solutions.

I find that these phantoms are mostly Amazon devices which aggressively try and use WPS to connect to a WiFi network.  However I have also seen other Android phones/tablets appear as  phantoms as well.  I have never seen a Windows PC appear as a phantom device but windows 8/10 will aggressively seek out and report any WPS devices looking for a connection.  It will also leave them in the windows explorer network device list for a relativity long time.

Since I have never used echo so I can not say what is is doing.  Perhaps it is setting up it's own WPS (but that is just a guess).