| Version | Description | Syntax | Example | Use Case |
|---|---|---|---|---|
| 1 | Based on the current time and the MAC address for the computer or "node" generating the UUID | 8-4-4-4-12 | ba6eb330-4f7f-11eb-a2fb-67c34e9ac07c |
If you just need a unique ID |
| 2 | Called "DCE security" UUIDs in RFC 4122. Version-2 specifications are published by DCE | 8-4-4-4-12 | ||
| 3 | Generated based on a "namespace" and unique "name". Namespace and name are concatenated and hashed. Version-3 UUIDs are based on an MD5 hash of the name and namespace | 8-4-4-4-12 | If you need to generate reproducible UUIDs from given names | |
| 4 | Generated using random or pseudo-random numbers | 8-4-4-4-12 | 4f73c2dc-7a2c-4d1f-9b76-1298a82ce0ee |
If you just need a unique ID |
| 5 | Generated based on a "namespace" and unique "name". Namespace and name are concatenated and hashed. Version-5 UUIDs are based on a SHA-1 hash of the name and namespace | 8-4-4-4-12 | If you need to generate reproducible UUIDs from given names |
Last active
June 6, 2023 06:31
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Explaining Different Versions of UUIDs
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