Because the whatsapp domain is called (while my IP address of the iPhone is known), the question is which route such a process runs. From my iPhone -> router -> but apparently there is another device in between.
If you have only one Apple AirPort router providing your network, then each WiFi or Ethernet device connects directly to the Apple router, not to another device "in between".
I''m trying to name de clients in my network but there are a number of unknown MAC addresses of which I have to find out which clients these are.
Unfortunately, the Apple routers are not consistent and sometimes display clients with their "name". At other times clients are displayed using their IP Address on the network or the MAC Address on the network. There are no adjustments on the AirPort Extreme for this.
If you know which clients are identified by their names, then you can also know which clients are not identified by their names.
Power off all of the clients that are not identified at this time
Restart the AirPort Extreme
Power up only one of the clients that are not identified and note the MAC Address or IP Address that has been assigned to that device
Power up the next client that has not been identified and note the MAC Address or IP Address that has been assigned to that device
Continue to power up and identify each device by the MAC Address
Now you have a list of each client that is displayed by its MAC Address or IP Address and you know the identity of each device.
If you are using an iOS device like an iPhone or iPad, you might want to try the following on each device:
Tap Settings on the Home Screen
Tap WiFi
Tap on the blue "i' next to the name of the network to which the device is connected
If Private Address is turned "On", turn it "Off"
Restart the iOS device to see if it now appears with its name instead of the MAC Address or IP Address. It may appear with the MAC Address at first, but later switch and appear with its name......and it might not. Nature of the beast with Apple routers.
If the AirPort Extreme is 5+ years old, it is now out of date as far as WiFi security is concerned, because it cannot produce a WiFi 6 network or provide higher WPA3 security settings. It might be time to start to think about a replacement router.