How to identify unknown devices on network?

[Ed Knapp]

The first unknown ( .3 ) looks like a Canon device. Printer?
.8 is a Vizio device. TV?
.104 is a device from a company called Silex.  Could be any number of devices. They seem to make a wide range of interesting products.
http://www.silexamerica.com

I just used a MAC address search tool online.
The first one that came up for me was http://www.coffer.com .
The first part of a Mac hardware address is the manufacturer. The remainder is a unique serial number/identifier.  The two together (are supposed) make a globally unique hardware address to prevent any possible addressing conflicts.

Some, er, less conscientious manufacturers aren't diligent about ensuring truly unique mac addresses.  It is easier and cheaper to make half a million exact copies than the added cost and complexity of incrementing the MAC address.
MAC address cloning can cause issues also if we are not careful.

Hopefully that will help a bit in tracking what has connected to your network.
Let us know here on the list if you have any other questions or if we can elaborate.

Have a great night!

Ed K.
Plug lurker

> On Jul 6, 2014, at 11:33 PM, joe at actionline.com wrote:
> 
> How can I identify the unknown devices (????? below)
> on my local network?
> 
> Source IP:  Devices:    Mac addr:
> 192.168.0.1 Motorola    00:24:37:85:73:f0 REPLACED
> 192.168.0.2 X5003191    2c:44:fd:67:34:ab Ethernet 3
> 192.168.0.3 Unknown ??    88:87:17:c0:a4:45 ?????
> 192.168.0.4 Galaxy phn    0c-71-5d-29-dc-ff
> 192.168.0.5 Tivo 84600    00:11:d9:55:72:ca
> 192.168.0.6 Xoom tab    98-4b-4a-c0-6f-3a
> 192.168.0.7 Chromecast    d0:e7:82:c4:5c:ac
> 192.168.0.8 ??????????    00:19:9d:56:50:2e ?????
> 192.168.0.9 Nexus7 tab    ac:22:0b:44:da:95
> 192.168.0.10 HP laptop    e0:06:e6:a2:93:a5
> 192.168.0.91 Lenovo      70:71:bc:3e:00:ed
> 192.168.0.64 T43 laptop    00:12:f0:34:5c:33
> 192.168.0.104 BRW008092CAC78E - 00:80:92:ca:c7:8e ?????
> 
> 
> 
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