How to factory reset ZyXEL NBG6616 router – Default Login & Password

The ZyXEL NBG6616 router has Gigabit WiFi, 4 N/A ETH-ports and 0 USB-ports.
It is also known as the ZyXEL Simultaneous Dual-Band Wireless AC1200 Media Router.
How to factory reset ZyXEL NBG6616 - Default Login & Password

ZyXEL NBG6616 default Password , Login & Gateway settings :

Default Gateway IP: 192.168.1.1
ZyXEL login instructions
Default password: 1234
Default subnet mask: 255.255.255.0
Default DNS server: 192.168.1.1

How to factory reset (hard reset) ZyXEL NBG6616 :

You can factory reset your ZyXEL NBG6616 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
If the SYS light doesn’t start to blink after 10 seconds
Keep holding the reset button pressed
Turn off the modem / unplug it
While still holding the reset button, start / plug in the router
After about 20 seconds, the Power or SYS light will start blinking rapidly
Release the reset button
When the light stops blinking and light up normally the router is reset.

ZyXEL NBG6616 router specifications :

System specs
CPU: 720 MHz
RAM: 128 MiB
Flash: 16 MiB
Custom firmwares: OpenWrt
Connectivity
WiFi: Gigabit (abgn+ac)
WiFi bands
2.4GHz & 5GHz
WiFi throughput: n/a
WAN
1 x N/A port
ETH
4 x N/A ports
USB-ports: 0
NBG6616 Firmwares
Staying up to date with the latest firmware is a good idea to keep your router even more
secure
from various security flaws.
If you want to squeeze a little bit of extra functionality out of your router, consider
flashing
an open-source firmware like dd-wrt, openWRT or LEDE. Flashing a custom ROM can greatly
increase
the stability and functionality of your old router.
Following are the firmwares that we have identified existing for the ZyXEL NBG6616
Flashing OpenWrt on the ZyXEL NBG6616
The ZyXEL NBG6616 is supported by OpenWrt according to their Table of
Hardware. So
flashing OpenWrt onto it should be quite straigthforward.
We couldn’t find any specific instructions for flashin OpenWrt on the ZyXEL
NBG6616, but since it’s listed in their Table of Hardware as supported, you can
head
over to the
OpenWrt install instructions and read on there.
Note: Flashing custom firmwares is always on you’re on own risk. Make sure to
read OpenWrt’s wikis to understand the risks and how to proceed if something goes
wrong.
ZyXEL stock firmware for the NBG6616
Stock firmwares for the NBG6616 are available under the download section on the
modem’s
support page. You can also refer
to the router’s manual for instructions on how to upgrade the firmware.