The HID ProxCard II 1326LSSMV in 35-bit Corporate 1000 format is a premium, controlled credential designed for organizations that require greater security and scalability than standard 26-bit cards. Unlike 26-bit formats—where facility codes and card numbers are widely shared and can be duplicated across different companies—Corporate 1000 assigns a unique, HID-managed company code, ensuring that credentials are exclusive to your organization and cannot overlap with others.

This 35-bit configuration provides a significantly larger card number capacity than 26-bit formats, making it ideal for enterprise-level systems, multi-location deployments, and organizations planning for long-term growth. While both formats operate on the same 125 kHz proximity technology, the key difference lies in control and security: 26-bit is open and commonly reused, whereas Corporate 1000 is restricted and centrally managed by HID. This makes the 35-bit Corporate 1000 card the preferred choice for customers who need to prevent duplication, standardize credentials across sites, and maintain tighter access control integrity.

The HID ProxCard II 1326LSSMV in 35-bit Corporate 1000 format was originally developed as a more secure alternative to standard 26-bit credentials, using a proprietary structure with a unique company code assigned and managed by HID. This helped prevent duplication and ensured that card numbers were not shared across organizations.

Today, while Corporate 1000 remains a controlled and higher-capacity format, it is important to understand that it is no longer exclusively produced by HID. Authorized and third-party manufacturers can now replicate Corporate 1000 credentials when proper encoding details are provided. As a result, the format should be viewed as offering greater structure and scalability than 26-bit, but not the same level of exclusivity it once did.

For most organizations, Corporate 1000 still provides significant advantages—such as a larger card population and better organization of credential data—but customers with strict security or anti-duplication requirements may want to consider higher-security technologies such as encrypted smart card platforms.