Why does my iPad air appear to have two different MAC addresses?
I'm seeing entries for two distinct MAC's in my DHCP server database for a single iPad Air...
11,01/27/14,00:02:49,Renew,192.168.0.1,Andys-iPad.yyy.local,CC785FB1612F,,407925 7579,0,,,,,,,,,0
11,01/27/14,00:07:49,Renew,192.168.0.2,Andys-iPad.yyy.local,B8E85679AF81,,157309 0531,0,,,,,,,,,0
Andy
Totally normal. Like most of us, you have more than one device using wifi and probably have a dual signal wifi that can accomodate many devices. Unless devices have static IP addresses, they will pick up on any avaiable IP in your list.
Totally normal. Like most of us, you have more than one device using wifi and probably have a dual signal wifi that can accomodate many devices. Unless devices have static IP addresses, they will pick up on any avaiable IP in your list.
The only way that would make sense is if the Air carried two seperate Wifi modules; one for 2.4Ghz and one for 5Ghz. However, if that were the case, they would be required to publish the MAC addresses (FCC requirement).
As it is, only one of the MAC addresses is actually visible on the Air in the About section.
I'm well aware of how DHCP functions; I'm just curious as to why a single device is requesting an IP on the network using two (obviously different) MAC addresses. I've confirmed it is a specific device(s) - the airs - doing this, as I've tested this on a isolated test network I have.
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192.168.1.185 appears twice.. Any idea?
I Discovered the exact same thing using "Fing" ( same issue on my home router and work router ), and after some searching around, I discovered that the other WiFi Mac address was not the Blutooth Mac address like so many think it is, but is really the WiFi Mac address from my old iPhone 4S ( I upgraded to the iPhone SE).
When I had brought the new SE home, I just did a "Restore from Backup", and apparently, it brought with it the old Mac Address from my 4S!
I know it's from my 4S because I keep a list of all my Mac addresses.
Now the problem is how to eliminate the old Mac address.
Well, I've discovered the problem. Apparently, Fing remembers all Mac addresses it has seen for a particular Router. It sort of keeps an image of all devices that have been previously connected to it. It seems here that it paired my iPhone device name with two different Mac addresses, my new current SE, and my old one ( the 4s). I used the exact device name for both. I had also assigned the new iPhone the exact static IP address on my router.
The solution was to remove the mac address and static IP address for my old 4S from the router and assign it to the mac address of my new SE, and then go into Fing, rescan.
Now the new mac address showed as the primary (the SE), an the old mac address and device name were greyed out.
I just deleted the old greyed out one, and now everything is fine.
NOTE: You can delete greyed out devices in the Fing app interface,
Thanks for following up; the problem was Fing, not the phone. I hadn't noticed that "feature" of Fing, but now that I look I see the same thing.
I was going to mention an alternate possibility: When a iPhone is searching for a network it publishes a bogus MAC address so the phone can't be tracked by its address unless you actually connect to the network. If you tap to connect it switches to the correct MAC address.
Yes exactly, the problem is "Fing" and not the router or the phone. The same thing happens on the router at work. The interesting thing will be, if I delete the device (in Fing) when I'm at work, and then re-scan, will the old mac address be eliminated.
I'm not an administrator there, so I'll just have to see.
Hi,
I have the same issue, my iphone 7 shows two mac addresses in the DHCP list with the same IP. one of the mac address is my old iphone 6's address. I dont know how to fix this.
Read the messages above yours in the thread.
I read already, Don't have anything to delete on my router. I see both MAC addresses no matter what I do. Reset router reboot iPhone nothing changed. i do not want to erase my entire iPhone to fix this. Any solutions?
Where do you see the two MAC addresses?
Fing. I erased whole Fing and tried in different routers and I always see two mac My old phone as primary and new phone as secondary.
It's a fing issue, as described by mikeejo.
The real question is what difference does it make? Why does it matter?
I see, so I don't need to worry about it since it is an app problem. i thought it was somewhat phone's problem. thanks
Two MAC address on WiFi?
