I'm running the latest Monterey 12.3.1 on an M1 iMac. When I run an IP scan of my network I see 2 multicast addresses:
235.255.255.239 (MAC address: 01:00:5E:7F:FF:EF) and
239.0.0.250 (MAC address: 01:00:5E:00:00:FA).
Is there any way to determine where on my network they are coming from?
Thanks.
iMac Line (2012 and Later)
First identify all devices on your network e.g. iPhone, iPad, smart TV, Amazon Echo devices, Smart home devices, security cameras, printers etc, get their Mac addresses and see if any of them matches the ones in question
Hi wa1oui, We appreciate you reaching out to us. We understand that you discovered MAC addresses on your multicast network.
As mentioned in the article below, "Multicast networking is commonly used for discovery protocols, allowing you to identify other devices on the network, or for bulk delivery of data to many hosts on the same network."
How to use multicast networking in your app
It would be challenging to identify a device based on a MAC address because some devices are using randomized MAC addresses, and some may even have MAC address spoofing.
We recommend that you reach out to the manufacturer of your router or access point and get support on how you can identify which devices are connected to your network.
Take care!
Determine source of multicast IP
