Interpret a UUID

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UUID: 
Your input:                      81dd9b16-7f75-4daf-ab1a-84cf71756199

Various notations:

URN:                             urn:uuid:81dd9b16-7f75-4daf-ab1a-84cf71756199
URI:                             uuid:81dd9b16-7f75-4daf-ab1a-84cf71756199
Microsoft GUID syntax:           {81DD9B16-7F75-4DAF-AB1A-84CF71756199}
C++ struct syntax:               { 0x81dd9b16, 0x7f75, 0x4daf, { 0xab, 0x1a, 0x84, 0xcf, 0x71, 0x75, 0x61, 0x99 } }

As OID (ISO/ITU-T 128 bits):     2.25.172621054617944893264161931506555904409
As OID (Microsoft):              1.2.840.113556.1.8000.2554.33245.39702.32629.19887.43802.8703857.7692697
As OID (Waterjuice 2x64 bits):   1.3.6.1.4.1.54392.1.9357806121675738543.12329312956376768921
As OID (Waterjuice 4x32 bits):   1.3.6.1.4.1.54392.2.2178784022.2138394031.2870641871.1903518105
As OID (Waterjuice 8x16 bits):   1.3.6.1.4.1.54392.3.33245.39702.32629.19887.43802.33999.29045.24985

Interpretation of the UUID:

Variant:                         [0b10_] RFC 4122 (Leach-Mealling-Salz)
Version:                         [0x4] Random
Random bits:                     10000001 11011101 10011011 00010110 01111111 01110101 ????1101 10101111
                                 ??101011 00011010 10000100 11001111 01110001 01110101 01100001 10011001
Random bytes:                    [0x81dd9b167f75?daf?b1a84cf71756199]