How to factory reset Arris SURFboard W31 router – Default Login & Password

The Arris SURFboard W31 router has Gigabit WiFi, 2 N/A ETH-ports and 0 USB-ports.
It is also known as the Arris SURFboard mAX AX11000 Whole-Home Wi-Fi Router.
How to factory reset Arris SURFboard W31 - Default Login & Password

Arris SURFboard W31 default Password , Login & Gateway settings :

If you have performed a reset of your SURFboard W31 device or not changed the defaults, you
should
be able to access it with the following settings
Default subnet mask: 255.255.255.0

How to factory reset (hard reset) Arris SURFboard W31 :

You can factory reset your Arris SURFboard W31 in the following way(s)
1. When the router is on, press the button reset and hold for 30 seconds.
2. While holding down the button reset, turn off the power of the router and hold down the button reset for 30 seconds
3. While holding down the button reset, turn on the power to the unit again and hold for another 30 seconds

Arris SURFboard W31 router specifications :

System specs
CPU: 1.8 GHz
RAM: 1024 MiB
Flash: 512 MiB
Custom firmwares: None
Connectivity
WiFi: Gigabit (abgn+ac+ax)
WiFi bands
2.4GHz & 5GHz
WiFi throughput: n/a
WAN
2 x N/A ports
ETH
2 x N/A ports
USB-ports: 0