How to find ip address of my Asus RT-AC86U in Access Point mode?

I know I'm resurecting an old, dead thread, but can't resist.

1. Connect to your AP.

2. Open a Command Prompt.

3. Type in: arp -a

The output will look like this:

Interface: 192.168.1.109 --- 0xa
Internet Address      Physical Address      Type
169.254.8.65          10-77-b1-02-e9-59     dynamic
192.168.1.1           68-7f-74-be-72-15     dynamic
192.168.1.107         bc-ae-c5-ec-04-96     dynamic
192.168.1.255         ff-ff-ff-ff-ff-ff     static
224.0.0.22            01-00-5e-00-00-16     static
224.0.0.251           01-00-5e-00-00-fb     static
224.0.0.252           01-00-5e-00-00-fc     static
239.255.255.250       01-00-5e-7f-ff-fa     static
255.255.255.255       ff-ff-ff-ff-ff-ff     static

You may have multiple Interfaces listed, refer to the one that matches the computer's IP address.

In this example, my computer is 192.168.1.109.

I would want to try and connect to all other 192.168.x.x.

Since I know 192.168.1.1 is my router, I tried .107 and .255, and voila! .107 is the access point.

EDIT: Just an FYI but .255 can't be the access point anyway, since it's the broadcast address for that subnet. So by elimination, .107 is the access point.

If you needed a single tool to do this nmap/zenmap is a good option. You'll probably want to scan your entire ip address range, and this may take a while but once thats done. All the entries look similar - 192.168.1.1 is my main router, and 192.168.1.19 is the secondary router set as an AP. The MAC address should help work out which device specifically is the asus - It should start with AC: as with mine.

Assuming you can ping, I'd probably suggest doing a quick IP address scan, followed by either checking up all these IP addresses or doing an ARP scan. An arp scan alone is kind of useless when you have not actually made any connections to a device.

You can get a pretty similar result with an ip address scanner - angry address scanner is what seems to be recommended and the arp -a command. The ip address scan will ensure the ip address is known to the system as being in use, and the arp command will list the ip address and mac addresses

This utility, supplied by Asus, tells you the hidden IP address. The link is from the RT-AC66U, but it might work for the 68 as well:

Windows

Mac OSX

I'm installing not one but four of these, two primary and two repeaters. Another way to find the addresses if you're running Windows is to use the "Device Discovery" utility ASUS provides at their support site. It more or less magically finds the device and provides a link to it.