Interpret a UUID

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UUID: 
Your input:                      21157f18-0d1a-4d21-a7e8-939e1d8dc024

Various notations:

URN:                             urn:uuid:21157f18-0d1a-4d21-a7e8-939e1d8dc024
URI:                             uuid:21157f18-0d1a-4d21-a7e8-939e1d8dc024
Microsoft GUID syntax:           {21157F18-0D1A-4D21-A7E8-939E1D8DC024}
C++ struct syntax:               { 0x21157f18, 0x0d1a, 0x4d21, { 0xa7, 0xe8, 0x93, 0x9e, 0x1d, 0x8d, 0xc0, 0x24 } }

As OID (ISO/ITU-T 128 bits):     2.25.43976139866482120732561001311435079716
As OID (Microsoft):              1.2.840.113556.1.8000.2554.8469.32536.3354.19745.42984.9674269.9289764
As OID (Waterjuice 2x64 bits):   1.3.6.1.4.1.54392.1.2383951319038315809.12099082706240782372
As OID (Waterjuice 4x32 bits):   1.3.6.1.4.1.54392.2.555056920.219827489.2817037214.495829028
As OID (Waterjuice 8x16 bits):   1.3.6.1.4.1.54392.3.8469.32536.3354.19745.42984.37790.7565.49188

Interpretation of the UUID:

Variant:                         [0b10_] RFC 4122 (Leach-Mealling-Salz)
Version:                         [0x4] Random
Random bits:                     00100001 00010101 01111111 00011000 00001101 00011010 ????1101 00100001
                                 ??100111 11101000 10010011 10011110 00011101 10001101 11000000 00100100
Random bytes:                    [0x21157f180d1a?d21?7e8939e1d8dc024]