5a82f65b-9a1b-41b1-af1b-c9df802d15db

import uuid
print(uuid.uuid4())  # Random v4

// Browser: crypto.randomUUID()
crypto.randomUUID(); // "5a82f65b-9a1b-41b1-af1b-c9df802d15db"

-- PostgreSQL
SELECT gen_random_uuid(); -- v4

The version number is located in the most significant 4 bits of the Time High section (the 4 in 41b1).

This indicates that the identifier is a Version 4 UUID. According to RFC 4122, Version 4 UUIDs are generated using random or pseudo-random numbers. They do not contain embedded timestamps or MAC addresses, relying solely on entropy for uniqueness.

If you found this UUID in logs, URLs, or error messages, check: 5a82f65b-9a1b-41b1-af1b-c9df802d15db

Since it's random, there is no embedded timestamp (unlike UUID v1) or meaningful personal data.

Given that the identifier is Version 4, the bits not used for version and variant metadata are filled with random data. import uuid print(uuid

Total Bit Count: 128 bits.

Fixed Bits (Overhead):

Random Bits (Entropy):

This means the probability of generating this specific identifier was $1$ in $2^122$, or approximately $1$ in $5.3 \times 10^36$. // Browser: crypto

The fact that 5a82f65b-9a1b-41b1-af1b-c9df802d15db is a Version 4 UUID has significant implications for its usage: