> For the complete documentation index, see [llms.txt](https://help.verkada.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.verkada.com/access-control/installation/access-control-deployment-best-practices/find-a-serial-number-and-mac-address.md).

# Find an Access Controller Serial Number and MAC Address

When you install or troubleshoot a Verkada door controller, you may need to find the serial number or the Media Access Control (MAC) address of the controller.

## Find an AC41 serial number and MAC address

Here are 2 ways you can find the serial number and MAC address of the Verkada [AC41](https://docs.verkada.com/docs/door-controller-ac41-datasheet.pdf) door controller:

* On a sticker label inside of the access controller's case. Open the door on the front of the AC41 and look for the sticker on the bottom right, directly under the cable management compartment.
* If it has previously been checked into Verkada Command:\
  Go to **All Products** > **Devices**. Select the device to view the serial number and MAC address in the device details panel.

***

## Find an AC62 serial number and MAC address

When you install or troubleshoot an [AC62](https://docs.verkada.com/docs/door-controller-ac62-datasheet.pdf) door controller, you may need to find the serial number or the MAC address of the controller.

You can find the serial number and MAC address on a sticker label inside of the access controller’s case.

{% stepper %}
{% step %}
**Open the door on the front of the AC62.**
{% endstep %}

{% step %}
**Look for the sticker on the bottom left, directly on top of the power input.**
{% endstep %}
{% endstepper %}


---

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