NBG6604
AC1200 Dual-Band Wireless Router

Thumbnail for the ZyXEL NBG6604 router with Gigabit WiFi, 4 100mbps ETH-ports and
0 USB-ports

The ZyXEL NBG6604 router has Gigabit WiFi, 4 100mbps ETH-ports and 0 USB-ports. It has a total combined WiFi throughput of 1200 Mpbs.
It is also known as the ZyXEL AC1200 Dual-Band Wireless Router.

Quick links:
Default password/Login
User Manuals

NBG6604 router specifications (specs)

System specs
CPU: n/a
RAM: 64 MiB
Flash: 8 MiB
Custom firmwares: None

Connectivity
WiFi: Gigabit (abgn+ac)
WiFi bands: 2.4GHz & 5GHz
WiFi throughput: 1200 Mpbs
WAN: 1 x 100mbps port
ETH: 4 x 100mbps ports
USB-ports: 0

Hard reset instructions for ZyXEL NBG6604

If your NBG6604 router is not working as it should, dropping connections or not being responsive, you should first do a reset of the router to see if the problems persist. Other scenarios where you might want to reset your router is if you've forgotten the password or misconfigured it and can't get access anymore.
Your can reset your ZyXEL NBG6604 in the following way(s):

Through the web interface

Open web browser and go to the address of your router (check defaults below)
Log in with your username/password (default are below)
Under Maintenance, locate Backup/Restore and click it
Locate the section Factory defaults and click the reset button, if prompted click Ok
Wait for the router to reboot

With the reset button

Have the router plugged in and turned on
Locate the reset button which is marked reset and usually in a hole
With a paperclip or sharp pen, press and hold the reset button for 10 seconds until the SYS light starts to blink
1. If the SYS light doesn't start to blink after 10 seconds:
  1. Keep holding the reset button pressed
  2. Turn off the modem / unplug it
  3. While still holding the reset button, start / plug in the router
  4. After about 20 seconds, the Power or SYS light will start blinking rapidly
  5. Release the reset button
When the light stops blinking and light up normally the router is reset.

The 30-30-30 reset

If the above instructions don't work you can always try the 30-30-30 reset as follows:

When router is powered on, press the reset button and hold for 30 seconds. (Use a paper clip or something sharp)
While holding the reset button pressed, unplug the power of the router and hold the reset button for 30 seconds
While still holding the reset button down, turn on the power to the unit again and hold for another 30 seconds.

This process usually works for resetting any router to it's factory setting.

Note: It is worth reading more about how to reset routers with the 30 30 30 reset and what the risks and considerations are when resetting your router this way, instead of just rebooting it.

Default factory settings for ZyXEL NBG6604

If you have performed a reset of your NBG6604 device or not changed the defaults, you should be able to access it with the following settings:

Default subnet mask: 255.255.255.0

Note: If you are using the default settings you should change them to increase security and prevent unathorized access to your network.