Find Local Hardware IP Addresses on LAN
If you need to view the IP addresses of other hardware on the lapp LAN ( Local Area Network ) as a Mac, the control line arp tool works quite well. You ’ ll promptly find other devices IP and accompanying MAC addresses, which can make direct network connections easier and be helpful for many early network and trouble-shoot purposes .

Find Local Device IP Addresses with arp

To get started, launch the Terminal app from /Applications/Utilities/ ( or accessed with Spotlight and Command+Spacebar ). The arp joyride is use ARP ( Address Resolution Protocol ) to display and control network address resolution functions. For the purposes we want to achieve here, the most simple use of arp is with an -a sag attached :
arp -a
This will return devices found on the local network, including other Macs, PCs, routers, iPhones, and iPads, displaying both their LAN IP savoir-faire adenine well as their individual MAC address. ( For the latter, you can help distinguish hardware by matching them up to the MAC cover found in MacOS X or in io ) .
An exercise of arp -a output looks like this :
% arp -a
? (192.168.0.1) at 0:0:ca:1:2:3 on en0 ifscope [ethernet]
? (192.168.0.2) at 68:b8:3d:22:1c:42 on en0 ifscope [ethernet]
? (192.168.0.11) at b4:12:23:5a:d3:6f on en0 ifscope [ethernet]
? (192.168.0.255) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]

How to Find IP Addresses of Devices on a Local Network with ping & arp

If the output doesn ’ deoxythymidine monophosphate look up to go steady, or if it ’ mho missing an IP you believe should be there, ping the air IP ( typically the last resultant role of arp -a ending with “ .255 ” ), then run arp -a again like thus .
foremost ping the broadcast IP :
Terminal% ping 192.168.0.255
PING 192.168.0.255 (192.168.0.255): 56 data bytes
64 bytes from 192.168.0.6: icmp_seq=0 ttl=64 time=0.079 ms
64 bytes from 192.168.0.1: icmp_seq=0 ttl=64 time=1.922 ms
--- 192.168.0.255 ping statistics ---
2 packets transmitted, 2 packets received, +6 duplicates, 0.0% packet loss
round-trip min/avg/max/stddev = 0.079/39.404/303.510/75.738 ms

then run arp -a instruction again :
Terminal% arp -a
? (192.168.0.1) at 0:0:ca:1:2:3 on en0 ifscope [ethernet]
? (192.168.0.2) at 68:b8:3d:22:1c:42 on en0 ifscope [ethernet]
? (192.168.0.10) at 22:12:bb:a0:3d:fd on en0 ifscope [ethernet]
? (192.168.0.11) at b4:12:23:5a:d3:6f on en0 ifscope [ethernet]
? (192.168.0.255) at ff:ff:ff:ff:ff:ff on en0 ifscope [ethernet]

note in this case that 192.168.0.10 is a fresh IP compared to the prior results, as that car fair joined the net .
You can ignore the protocol suggestion at the end of the arp results, in this example despite the devices showing as “ ethernet ”, they ’ re actually all on a radio receiver network with wi-fi on the en0 interface .
Do note that you will not see the Macs own IP address or MAC address in this list. If want be, you can find your own IP address through Terminal, System Preferences, or by using an outside service if you ’ re looking for the external address .
While arp works good enough for most cases, and it has the advantage of being built into all versions of Mac OS X, it may not be sufficient for everyone. For more advanced users, nmap is an evening better option for a network discovery instrument, but nmap requires installing either directly, compiling through reservoir, or through something like home brew .

How do I find IP addresses of all other computers on my network?

The above ping and arp trick will find and list all IP addresses of any devices or computers on the network. This means the IP address of any same network connected Mac computers, Windows PC, Linux machines, io devices like iPhone and iPad, Android phones and tablets on the same net, evening set-top IP enabled boxes like an Apple television receiver or Playstation will be found, assuming those devices and computers are connected to the lapp local net as the calculator doing the searching.

Do you know of another helpful way to to find, locate, and number network connected devices and computers on the same network ? partake it with us in the comments !

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