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How can I find the ip addresses of all the devices on my network?

How can I find the ip addresses of all the devices on my network?

Old Dec 12, 11, 9:26 pm
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How can I find the ip addresses of all the devices on my network?

Every so often, I need to find the ip addresses for one of the devices on my network. (Yes, I've thought about assigning static ip's to all the ones where that is possible, but never have gotten around to it).

I know that Network Magic will do a network map but I really don't want to install it again and have its service running all the time.

Is there a program -- or a command line -- that will do a network census and then tell me what ip's are currently assigned (via the router's DHCP) to which devices?
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Old Dec 12, 11, 9:36 pm
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Originally Posted by cblaisd View Post
Is there a program -- or a command line -- that will do a network census and then tell me what ip's are currently assigned (via the router's DHCP) to which devices?
Virtually all routers have an option to show a list of the current DHCP leases:

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Old Dec 12, 11, 9:37 pm
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I usually just log into the router and look up the DHCP table and that show all Ip addresses assigned along with name of device if one is available.
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Old Dec 12, 11, 9:38 pm
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Good points. I'd forgotten that. :redfaced:
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Old Dec 12, 11, 9:46 pm
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Okay. Found the list of DHCP clients. But I apparently assigned a static ip to a couple of devices and now can't remember them so can't get to their config pages.
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Old Dec 12, 11, 10:04 pm
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Advanced IP Scanner is a free utility that will scan a range of IP addresses

http://www.radmin.com/products/ipscanner/

It's not the best out there, but it's pretty small and as a one off may be just what you are looking for. It gives the IP and Mac address, sometimes the name.
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Old Dec 12, 11, 10:13 pm
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Mahalo nui
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Old Dec 12, 11, 11:14 pm
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Hi, cblaisd

This tool scan local network and list ip/mac addresses, hostname, workgroup, manufacturer for every network devices on network:

http://trogonsoftware.com/trogon-mac-scanner.html
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Old Dec 13, 11, 12:41 am
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If you have an Android phone there is an app called "Fing" does what you want and a lot more.
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Old Dec 13, 11, 9:15 am
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nmap is a free and open source network scanner/port scanner/does lots of other stuff. There are versions for Linux and Windows...and I think MacOS.

http://nmap.org/
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Old Dec 13, 11, 9:43 am
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This is not guaranteed to find them all (depends on the individual device firewall rules/etc), but it'll normally do a fairly good job...

Firstly, do a broadcast ping to the "network" address, which is the last IP address in the range you network is using. eg, if your using 192.168.1.0, then you want :
ping 192.168.1.255

Ignore the results you get back from the ping - they won't tell you much.

Next, run :
arp -a

Scroll through the resulting list and look for everything with the word "dynamic" next to it, and you'll have your list of most/all of the devices on the network (excluding the host you're doing this from). Note that "dynamic" in this context is referring to the "ARP cache", does not relate to dynamic/static DHCP entries in any way.
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Old Dec 13, 11, 10:05 am
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Originally Posted by docbert View Post
This is not guaranteed to find them all (depends on the individual device firewall rules/etc), but it'll normally do a fairly good job...
Actually it usually won't give you most of devices. You could though create a script that will ping the whole subnet, one by one. Unless you have some sophisticated IDS or end-point firewalls, it will give you a full overview.
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Old Dec 13, 11, 12:53 pm
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If you are on a mac and any airport product, the airport utility will show all clients connected and assigned DHCP addresses.
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Old Dec 13, 11, 12:59 pm
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Just a warning, nmaping on anothers network is bad manners and looks like (and often is!) an attack...
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Old Dec 13, 11, 1:18 pm
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Another alternative
http://www.nirsoft.net/utils/wireles...k_watcher.html
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