How Should I Store IPv6-Compatible Addresses in MySQL?

Storing IPv6-Compatible Addresses in a Relational Database

As your application moves towards IPv6 readiness, the question arises of how to effectively store IPv6-compatible addresses in your MySQL database. Considering the 128-bit size of IPv6 addresses, let's evaluate the suggested approaches:

• 2xBIGINT: This is a reasonable option. The combination of two 64-bit unsigned integers provides ample space to represent the entire IPv6 address range.
• CHAR(16): While this provides a binary storage format, it would require additional conversion functions for processing, increasing complexity.
• CHAR(39): This is suitable for text storage but is less efficient and flexible compared to binary formats.
• 8xSMALLINT: This method involves storing the address in eight segments of 16-bit integers, which is less efficient and requires a dedicated table for storage.

Considering these options and MySQL's current lack of native IPv6 support, our recommendation aligns with the suggestion of using 2 * UNSIGNED BIGINT. This approach provides a straightforward and efficient way to store IPv6 addresses in your database.

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