This is a locally administered address in the IEEE 802c ELI (Extended Local Identifier) quadrant, whose company ID is registered to a real organization. The vendor identity can be trusted even though the address itself is not universally administered.
MAC addressFA:66:73:00:00:00
OUIFA:66:73
Vendor addressTHAPASYA, KALAPARAMBATH (H), MATHILAKAM P.O THRISSUR KERALA IN 680685
Country🇮🇳 India
Block rangeFA:66:73:00:00:00– FA:66:73:FF:FF:FF
Address capacity16,777,216
TransmissionUnicast: addressed to a single device
AdministrationLocally administered: set by software, not burned into hardware
IEEE 802c quadrantELI: Extended Local Identifier
RandomizationLikely randomized
Derived modified EUI-64F8:66:73:FF:FE:00:00:00
Possible IPv6 link-local derivationfe80::f866:73ff:fe00:0
The EUI-64 and IPv6 link-local fields are a mathematical derivation from this MAC address. They don't confirm the device currently uses that IPv6 address.
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