SS58 Registry serves as an authoritative index of SS58 account types enumerated for the Polkadot, Kusama, and Substrate ecosystems. Structured from a JSON dataset within the repository, each entry delineates a unique u16 prefix, corresponding network specifics (e.g., “astar”), a display name, associated symbol, decimal precision, and cryptographic standard account type (*25519). This registry facilitates seamless integration and interoperability across blockchain networks by maintaining consistent account type definitions. Contributors can easily enhance the registry by adding new account types, adjusting the contiguous prefix, and updating version numbers via Cargo, followed by committing changes and submitting a pull request. The project operates under the Apache-2.0 license and releases new versions on crates.io upon admin approval of contributions.