Keyscan C1325 & C15001 Formats: How to Match Credentials to Existing Panels

When managing or expanding an existing Keyscan access control system, choosing the correct credential format is essential for compatibility and system reliability. The Keyscan C1325 and C15001 formats are two of the most common proximity card types used in commercial buildings, office complexes, and secured facilities throughout North America. Understanding how these formats work — and how to match them to your existing panels — helps ensure smooth system integration, reduced troubleshooting, and lower long-term costs.

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1. Understanding Keyscan Credential Formats

Keyscan, a division of dormakaba, designed the C1325 and C15001 formats to operate with their proprietary access control panels and readers. Both formats use a 125 kHz low-frequency proximity signal but differ slightly in their internal data structure and bit layout.

• Keyscan C1325 Format – Uses a standard Wiegand-style structure compatible with legacy Keyscan controllers and many third-party systems that accept 36-bit Wiegand data.
• Keyscan C15001 Format – A secure, proprietary data structure supported by later-generation Keyscan panels (such as CA150, CA250, and CA8500) and associated readers.

These differences mean that not all cards will work interchangeably — using the wrong format can cause a “no read” or “invalid credential” message on your panel.

2. Matching Credentials to Your Existing Panel

To determine which Keyscan format your system uses, start with the following steps:

• Check the Reader Model: Keyscan readers labeled “C15001 compatible” are designed for newer panels that support the C15001 format, while older C1325 readers (like the K-Prox or C1000 series) use the C1325 encoding.
• Review Your Panel Model: Panels such as CA150, CA250, or CA8500 typically support both formats, but older CA100 or CA200 systems are usually limited to the C1325 format.
• Examine Existing Cards: Many original Keyscan cards display the part number printed or embossed on the back (for example, C1325 or C15001).
• Test a Known Card: Present an existing credential to a reader. If the panel recognizes it, you can identify its format through your Keyscan Aurora software under the cardholder data field.

3. Compatible Credential Types

AuthorizID offers Keyscan-compatible proximity credentials that match both the C1325 and C15001 formats, including:

• Printable PVC Cards (CR80 size for photo ID printing)
• Key Fobs for convenient keyring use
• Adhesive Tags for attaching to phones or wallets
• Wristbands for gym and pool access environments

These alternatives allow facilities to expand their systems with reliable credentials while maintaining full compatibility with existing Keyscan readers and panels.

4. Common Keyscan Reader and Credential Part Numbers

These part numbers ensure proper format matching when adding or replacing cards and readers in existing systems.

5. When to Upgrade or Reformat

If you are expanding your system, consider upgrading older C1325 installations to the newer C15001 format for better encryption and data integrity. However, both formats can coexist on many modern panels, allowing a gradual transition that avoids disruption.

When ordering replacement credentials, always specify the exact format, facility code, and card number range to ensure seamless integration.