If you’re working in real estate or using a Supra lockbox, you may have come across the term “CBS code.” But what exactly does it mean, and when is it needed? Whether you’re a listing agent, buyer’s agent, or vendor, understanding how CBS codes work can help you better manage showings and protect access to your listings.

What Does CBS Code Mean?

CBS stands for Call Before Showing. It’s a seven-digit code programmed into the Supra iBox BT LE, an electronic lockbox used by real estate professionals to secure properties listed for sale or rent. When the lockbox is registered with the MLS, a CBS code is assigned to it. The listing agent can later change or update this code as needed. The main purpose of a CBS code is to give listing agents greater control over who can access the property and when.

When Is a CBS Code Required?

When the listing agent enables it

Supra lockboxes offer the option for listing agents to turn on the CBS feature. If it’s enabled, any agent trying to access the property will need to enter both their PIN and the CBS code. If the feature is turned off, anyone with proper access credentials can open the lockbox without needing the extra code.

When a vendor or affiliate needs access

In some real estate markets, CBS codes are always required for affiliates such as home inspectors, photographers, and appraisers. For example, in the Arizona Regional Multiple Listing Service (ARMLS), vendors must enter a CBS code for every lockbox they open, even if the listing agent hasn’t enabled the setting. This added security helps maintain accountability for all property access.

Why Use a CBS Code?

Using a CBS code provides an extra layer of security and organization during the home showing process. For listing agents, it ensures that showings are pre-approved and prevents unauthorized visits. For homeowners, it adds peace of mind knowing that no one can access the home without prior confirmation. In many cases, CBS codes are used alongside scheduling tools like ShowingTime, which can automatically send the code to a buyer’s agent once a showing is confirmed. This allows agents to spend less time on coordination and more time on client service and marketing.

How to Get a CBS Code

If you need the CBS code for another agent’s lockbox

You’ll need to contact the listing agent directly. Supra and ARMLS will not provide CBS codes for lockboxes that aren’t assigned to you. If you try to open a lockbox and see a “Not Authorized” error, that usually means the CBS feature is active and you need the code from the listing agent.

If you need the CBS code for your own lockbox

There are three main ways to retrieve or manage the CBS code on your own lockbox:

Use the Supra eKEY app

Open the eKEY app and go to “My Keyboxes.” Select your lockbox by serial number and tap “Program Keybox.” Under Keybox Settings, you’ll see an option for CBS Code. You can view, edit, or activate it by checking the “Require CBS” box.

Use SupraWEB

Log in to your SupraWEB account using the lockbox serial number and shackle code. Once inside, you can view and manage the CBS code from your lockbox inventory page.

Call ARMLS

If you prefer phone support, call ARMLS at 480-921-7777. A representative will verify your identity and provide the CBS code for your lockbox over the phone.

How to Find, Change, or Activate a CBS Code in the eKEY App

To find your CBS code, open the eKEY app and go to “My Keyboxes.” Tap the lockbox you want to manage. From the keybox options page, select “Program Keybox.” The CBS code will be listed under “Keybox Settings: Require CBS Code.” You can activate it by checking the “Require CBS” option, or change it by tapping on the current code.

Final Thoughts

CBS codes are a simple but powerful tool for managing showings and access in real estate. Whether you’re a listing agent protecting your client’s home, a buyer’s agent coordinating a tour, or a vendor providing services, understanding how CBS codes work can help streamline communication and ensure secure property access. The next time you run into a lockbox requiring a CBS code, you’ll know exactly what to do—and why it matters.