4bce6bec-d94b-bdc9-8531-5f0fac3a084c [ 2025-2026 ]

Are you trying to identify a transaction, user, or device?

To circumvent this performance issue while retaining the architectural benefits of a 128-bit identifier, modern systems deploy two strategies: 4bce6bec-d94b-bdc9-8531-5f0fac3a084c

A UUIDv4 is distinct because it is generated using completely random or pseudo-random data. Out of the 36 characters (including four hyphens), it explicitly encodes specific bits to signify its version and variant: Are you trying to identify a transaction, user, or device

The tells us which layout of the UUID is being used. It is encoded in the first three most significant bits of the fourth group ( clock_seq_and_variant ). For the fourth group 8531 , the first hex digit is 8 . In binary, 8 is 1000 . The variant is determined by the first two bits: It is encoded in the first three most

Unless you have a specific reason to adopt this exact identifier (e.g., it’s a fixed test key or a demonstration value), using standard methods. Copy‑pasting a static UUID can lead to collisions if the same value is used across multiple records or environments.

4bce6bec-d94b-bdc9-8531-5f0fac3a084c ^ ^ | +-- Variant bits (indicates RFC 9562/4122 standard) +------- Version bit (Always '4' for UUIDv4)