Version
Count 1
Format
xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx
Version reference
v1
time-based Embeds MAC address + timestamp. Leaks identity.
v4
random 128 bits of randomness via CSPRNG. Most widely used.
v5
name-based SHA-1 hash of namespace + name. Deterministic.
v7
time-ordered Unix ms prefix. Sortable — ideal for database keys.
0 UUIDs · v4