Find IP addresses of a private network

C:user>arp -a

 C:user>ping 192.168.1.90

You have a private or public network with servers and workstations that are assigned static and dynamic IP addresses (either private or public IPs). You assigned them the static IP addresses due to NAT (Network Address Translation) or for public access, and dynamic IP addresses via the DHCP. Even if you kept a good record of those assigned IPs, there are times when you want to find all IP addresses of networked devices. The following procedure may be used to determine IP addresses of networked devices that are connected to your network.

1. If you have a web access to your router, you may connect to your router and find the IP addresses of all networked devices. The router displays Static and Dynamic client lists with hostname, IP address and MAC address of the connected devices.

2. You may also try pinging your network from a computer connected to the network, and lookup an arp table. On your computer, click [Start] -> [Run...] and type "cmd" and [Enter]. Type "ipconfig" to find your network address. The network address is found by performing a logical AND operation on your IP address and the subnet mask. For example, if you IP is 192.168.1.101 and subnet mask is 255.255.255.0, then the network address is 192.168.1.0. Ping your network using a broadcast address, i.e. "ping 192.168.1.255". After that, perform "arp -a" to determine all the computing devices connected to the network.

3. You may also use "netstat -r" command to find an IP address of all network routes. However, if your printer has problem communicating with other network devices, you may not be able to find IP address of the printer using "netstat" command.

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