Interpret a UUID

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UUID: 
Your input:                      644cdf5b-e4f4-4e8d-80c9-155fb8144109

Various notations:

URN:                             urn:uuid:644cdf5b-e4f4-4e8d-80c9-155fb8144109
URI:                             uuid:644cdf5b-e4f4-4e8d-80c9-155fb8144109
Microsoft GUID syntax:           {644CDF5B-E4F4-4E8D-80C9-155FB8144109}
C++ struct syntax:               { 0x644cdf5b, 0xe4f4, 0x4e8d, { 0x80, 0xc9, 0x15, 0x5f, 0xb8, 0x14, 0x41, 0x09 } }

As OID (ISO/ITU-T 128 bits):     2.25.133321944397702568404817480419871310089
As OID (Microsoft):              1.2.840.113556.1.8000.2554.25676.57179.58612.20109.32969.1400760.1327369
As OID (Waterjuice 2x64 bits):   1.3.6.1.4.1.54392.1.7227397087799037581.9279972008028029193
As OID (Waterjuice 4x32 bits):   1.3.6.1.4.1.54392.2.1682759515.3841216141.2160661855.3088335113
As OID (Waterjuice 8x16 bits):   1.3.6.1.4.1.54392.3.25676.57179.58612.20109.32969.5471.47124.16649

Interpretation of the UUID:

Variant:                         [0b10_] RFC 4122 (Leach-Mealling-Salz)
Version:                         [0x4] Random
Random bits:                     01100100 01001100 11011111 01011011 11100100 11110100 ????1110 10001101
                                 ??000000 11001001 00010101 01011111 10111000 00010100 01000001 00001001
Random bytes:                    [0x644cdf5be4f4?e8d?0c9155fb8144109]