MAC Address Formatter & EUI-64

Formats

Colon		Copy
Hyphen		Copy
Cisco dot		Copy
Bare		Copy

Analysis

I/G bit (bit 0 of octet 1)
U/L bit (bit 1 of octet 1)
OUI (first 3 octets)		Copy
NIC (last 3 octets)		Copy

OUI vendor lookup is not included — it requires a large database. Use the IEEE MA-L registry to look up vendors.

EUI-64 & IPv6 Link-Local

EUI-64 interface ID		Copy
IPv6 link-local		Copy

EUI-64: FFFE is inserted between the OUI and NIC, then the U/L bit (bit 1 of the first octet) is flipped. The link-local prefix fe80::/10 is prepended and the address is compressed per RFC 5952.