> For the complete documentation index, see [llms.txt](https://vincechain.gitbook.io/vince-chain-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vincechain.gitbook.io/vince-chain-documentation/3.-vince-chain-protocols/concepts/vince-chain-id-structure-format.md).

# Vince Chain ID Structure/Format

There are three primary components of the Vince Chain Identifier

* The Identifier: String stating the application’s name.
* The EIP155 Number: Immutable [EIP155](https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md) Chain ID stating the replay attack protection number.
* The Version Number: The model number (usually a positive integer) on which the blockchain is running at the time. The developer must upgrade this number whenever there is an upgrade or fork on the network to avoid consensus errors.

A string format of Vince Chain’s genesis ID will look like this: \[identifier]\_\[EIP155]-\[version]

The version number upgrade is represented in the table below:

| Chain ID           | Identifier  | EIP155 Number | Version Number |
| ------------------ | ----------- | ------------- | -------------- |
| vincechain\_1000-1 | Vince Chain | 1000          | 1              |
| vincechain\_1000-2 | Vince Chain | 1000          | 2              |
| vincechain\_1000-n | ….          | 1000          | n              |