The serial number can be located on the bottom panel of the unit and in the Web Management interface of the SBR-AC1750.  This document includes the following sections:
Locating the Serial Number on the Bottom Panel
The serial number can be located on a white sticker on the bottom of the device. 

Locating the Serial Number in the Web Management Interface
- Launch a web browser, such as Internet Explorer, Firefox, or Safari.  Enter http://192.168.0.1 into the address box, and press the Enter key.  The Login page appears.
	
	NOTE: By default the LAN IP address is 192.168.0.1.  If the default address has been changed, enter the custom address in the address box.
	
	
	  - On the Login page:
	a.   Enter password in the Password field.
	b.   Click the Login button.  The Home page appears.
	
	
 
	  - Move the mouse-cursor to the UTILITIES and select System Information from the drop-down submenu.  The UTILITIES - System Information page appears.
 - The serial number will be displayed (as shown below).
	
	