Interpret a UUID

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UUID: 
Your input:                      66dff7f0-561e-11f1-805d-4cf95d479851

Various notations:

URN:                             urn:uuid:66dff7f0-561e-11f1-805d-4cf95d479851
URI:                             uuid:66dff7f0-561e-11f1-805d-4cf95d479851
Microsoft GUID syntax:           {66DFF7F0-561E-11F1-805D-4CF95D479851}
C++ struct syntax:               { 0x66dff7f0, 0x561e, 0x11f1, { 0x80, 0x5d, 0x4c, 0xf9, 0x5d, 0x47, 0x98, 0x51 } }

As OID (ISO/ITU-T 128 bits):     2.25.136744166566097854337755637428754290769
As OID (Microsoft):              1.2.840.113556.1.8000.2554.26335.63472.22046.4593.32861.5044573.4692049
As OID (Waterjuice 2x64 bits):   1.3.6.1.4.1.54392.1.7412916123284148721.9249633843584407633
As OID (Waterjuice 4x32 bits):   1.3.6.1.4.1.54392.2.1725954032.1444811249.2153598201.1564973137
As OID (Waterjuice 8x16 bits):   1.3.6.1.4.1.54392.3.26335.63472.22046.4593.32861.19705.23879.38993

Interpretation of the UUID:

Variant:                         [0b10_] RFC 4122 (Leach-Mealling-Salz) / DCE 1.1
Version:                         [0x1] Time-based with unique host identifier
Timestamp:                       [0x1f1561e66dff7f0] 2026-05-22 20:40:00'0157680 GMT
Clock ID:                        [0x805d] 93
Node ID:                         [0x4cf95d479851] 4C-F9-5D-47-98-51

In case that this Node ID is a MAC address, here is the interpretation of that MAC address:

Input:                           4C-F9-5D-47-98-51
Type:                            EUI-48 (Extended Unique Identifier)

EUI-48 or MAC-48:                4C-F9-5D-47-98-51
EUI-64:                          4C-F9-5D-FF-FF-47-98-51 (MAC-48 to EUI-64 Encapsulation)
                                 4C-F9-5D-FF-FE-47-98-51 (EUI-48 to EUI-64 Encapsulation)
                                 4E-F9-5D-FF-FE-47-98-51 (MAC/EUI-48 to Modified EUI-64 Encapsulation)
IPv6-Link-Local address:         fe80::4ef9:5dff:fe47:9851
Administration type (U/L flag):  [0] Universally Administered Address (UAA)
Transmission type (I/G flag):    [0] Unicast (Individual)

IEEE OUI (MA-L):                 0x4CF95D
Vendor-specific part:            0x479851
Registrant:                      HUAWEI TECHNOLOGIES CO.,LTD
Address of registrant:           No.2 Xin Cheng Road, Room R6,Songshan Lake Technology Park
                                 Dongguan    523808
                                 CN