I have a NAS device on my network which has a web interface, but I didn’t know it’s IP. Running this simple command from cmd.exe gave me a handful of IPs to try which lead me to finding it very quickly:
arp -a
The results should look something like this:
C:\Users\Mark>arp -a
Interface: 192.168.0.12 --- 0xa
Internet Address Physical Address Type
192.168.0.1 78-cd-8e-7a-b5-f7 dynamic
192.168.0.15 00-01-55-31-0c-29 dynamic
192.168.0.17 1c-4b-d6-cf-e3-2d dynamic
192.168.0.255 ff-ff-ff-ff-ff-ff static
224.0.0.2 01-00-5e-00-00-02 static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
225.0.0.1 01-00-5e-00-00-01 static
230.0.0.3 01-00-5e-00-00-03 static
239.255.255.250 01-00-5e-7f-ff-fa static
255.255.255.255 ff-ff-ff-ff-ff-ff static
Interface: 192.168.56.1 --- 0xf
Internet Address Physical Address Type
192.168.56.255 ff-ff-ff-ff-ff-ff static
224.0.0.2 01-00-5e-00-00-02 static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
225.0.0.1 01-00-5e-00-00-01 static
239.255.255.250 01-00-5e-7f-ff-fa static
Interface: 192.168.0.12 --- 0xa
Internet Address Physical Address Type
192.168.0.1 78-cd-8e-7a-b5-f7 dynamic
192.168.0.15 00-01-55-31-0c-29 dynamic
192.168.0.17 1c-4b-d6-cf-e3-2d dynamic
192.168.0.255 ff-ff-ff-ff-ff-ff static
224.0.0.2 01-00-5e-00-00-02 static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
225.0.0.1 01-00-5e-00-00-01 static
230.0.0.3 01-00-5e-00-00-03 static
239.255.255.250 01-00-5e-7f-ff-fa static
255.255.255.255 ff-ff-ff-ff-ff-ff static
Interface: 192.168.56.1 --- 0xf
Internet Address Physical Address Type
192.168.56.255 ff-ff-ff-ff-ff-ff static
224.0.0.2 01-00-5e-00-00-02 static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
225.0.0.1 01-00-5e-00-00-01 static
239.255.255.250 01-00-5e-7f-ff-fa static
It was one of the dynamic IPs; I’m not sure if that’s always the case.
Leave a comment