Each Axis product has a unique serial number that can be used in the installation process or for identification of individual devices in large installations.  

Serial numbers for Axis network video, print and document servers generally start with either 00408c, accc8e, b8a44f and e82725 followed by another 6 hexadecimal characters. The serial number is identical to the product's hardware address (MAC address) and can be written in the format 00408c1a2b3c, accc8e1a2b3c, 00:40:8c:1a:2b:3c​ or acc:cc:8e:1a:2b:3c.

Where?How do I find it?
Axis Network Video Products
On the hardwareSee the printed label on the Axis network video product
(the label may be hidden if the Axis device is installed)
Internal Web pages (GUI)In the network video product's internal web pages, go to:
Setup / System Options / Support / System Overview 

In the network video product's internal web pages, go to:
Setup / System Options / Support / Logs & Reports / Information / Server Report

 

The server report contains important information about the Axis network video product, firmware version and a list of the current parameter settings. A valid server report is required when requesting assistance from Axis support.