Supra Lockboxes Explained


Supra Lockboxes — Critical Information Guide

1. Overview

Supra lockboxes are secure, Bluetooth-enabled devices used in real estate to store property keys for authorized access. They are part of the Supra eKEY® System, which works with a paired mobile app or access code. They allow controlled, trackable entry for showings, contractors, and inspections.

2. Core Features

  • Secure Key Storage — Tamper-resistant steel body with an internal key container.
  • Bluetooth® Access — Opens via the Supra eKEY app on a smartphone or tablet.
  • Time-Restricted Access — Showings can be limited to certain days/hours.
  • Access Logging — Records who opened it and when.
  • Portable or Permanent Mounts — Available as shackle models or wall-mounted units.

3. Understanding Supra Codes

Code What It Is Who Uses It When It’s Needed
Lockbox Serial Number A unique number printed on the back/bottom of the lockbox (e.g., 1234567). Used to identify and assign the box in SupraWEB or MLS. Listing agent, MLS staff, Supra support Assigning the box to a property or troubleshooting.
CBS Code (Call Before Showing) A 7-digit security code that allows access to the lockbox. Showing agents, listing agent When a listing’s settings require an extra security step before granting access.
Shackle Code A 4-digit code used to physically open the shackle so the box can be attached or removed from a property. Listing agent, authorized staff When installing the box or removing it after the listing ends.

Key differences:

  • Serial number = ID for tracking/assignment
  • CBS code = code that allows access for non-licensed inspectors or assistants
  • Shackle code = physically attach/detach the lockbox

4. Access Methods

  1. Supra eKEY App — Primary access method; requires Bluetooth and internet. Generally, only licensed agents can access this way.
  2. One-Day Codes — Temporary access for non-MLS users (e.g., contractors).
  3. ActiveKEY® Device — Older standalone device (rarely used now).

5. Setup & Activation

  1. Assign the lockbox to your listing in SupraWEB using the serial number.
  2. Set showing hours, CBS requirement (if desired), and shackle code.
  3. Install securely at the property.

6. Troubleshooting

Box won’t open

  • Make sure Bluetooth is on, eKEY app is active, and internet is connected.
  • If CBS is required, confirm you have the correct code.
  • Update eKEY authorization in the app if needed.

Shackle won’t release

  • Verify correct shackle code.
  • In the app, select “Release Shackle” before entering code.

No access for showing agent

  • Check if CBS is enabled and that they have the code.
  • If not, issue a One-Day Code as a backup.

7. SupraWEB Functions

  • Assign/unassign lockboxes
  • Enable or disable CBS requirement
  • View access logs
  • Change shackle codes
  • Manage inventory

8. Costs & Account Requirements

  • Active Supra eKEY subscription (monthly/annual).
  • Lockboxes may be owned or leased from the MLS.
  • Replacement units can cost several hundred dollars.

9. Support Contacts

  • Supra Support — (877) 699-6787 / support.supraekey.com
  • Local Association Office — Hardware swaps/replacements

The Difference between Supra Lockboxes and Combination Lockboxes

tl;dr:

  1. Supra lockboxes are provided at every listing so that agents can show our listings. Supra provides us with information on who is showing a property, and when. This allows us to track showings and ask agents for feedback.
  2. Combo lockboxes are provided at (almost) every listing so that we can give vendors access to complete makeready. They also allow us to easily manage keys, and serve as a backup if the Supra fails.

1. Access and Security

  • Supra Lockboxes (Electronic):
    • Require an authorized device—typically the Supra eKEY app on a licensed real estate agent’s smartphone—to open.
    • Can be programmed with time-restricted access, such as limiting showings to specific hours.

    • Generate detailed access logs, tracking who opened the box and when. That level of accountability and traceability is unmatched by mechanical boxes.


  • Combination Lockboxes (Mechanical):
    • Use a 4-digit code to unlock—no app or formal authorization required.
    • Offer ease and flexibility, particularly for contractors or non-agent access.

    • However, lack any access tracking and offer no audit trail—once someone has the code, they have persistent access.


2. Use Cases & Flexibility

  • Supra Lockboxes:
    • Best for situations requiring security, control, and documentation—like high-value listings, vacant properties, or team environments.

    • Some agents opt to add a combo lockbox alongside a Supra for contractor access or backups.

      “Supra allows agent and seller to know who came and left…”

      longbeachpropertymgmt.com+11Reddit+11ActiveRain+11

    • Not accessible by individuals without Supra credentials—this can be a drawback for non‑agent visits.

      ActiveRain+1

  • Combination Lockboxes:
    • Cheap, widely available—requires no subscription or MLS affiliation.
    • Ideal for short-term, low-stakes access needs—like contractors or emergency entry.
    • We generally use combo lockboxes to provide easy access to our contractors.
    • We NEVER give out our combo lockbox codes to anyone we do not know or trust. We never provide the combo lockbox codes to agents. Agents MUST use the Supra lockbox to access listings.

3. Cost & Accountability

  • Supra Lockboxes:
    • Typically more costly (around $150), require a monthly subscription or activation fee and integration into the Supra system via your MLS.

    • Provide justified value through enhanced security, tracking, and compliance.

      Combo Lockboxes:

    • Cheap (often under $20), no subscription or tech needed.
    • Low accountability; higher risk if codes are copied or not changed consistently.
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