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MAC prefix 00:1F:DD

Assigned by the IEEE to GDI LLC.

Prefix
00:1F:DD   00-1F-DD   001F.DD
Block type
MA-L (16,777,216 addresses)
Address range
00:1F:DD:00:00:00 – 00:1F:DD:FF:FF:FF
Organization
GDI LLC
Registered address
One MidAmerica Plaza, Oakbrook Terrace IL 60181, US
Country
United States (US)
Address bits
Unicast (I/G bit 0), globally unique (U/L bit 0)

Look up 00:1F:DD:00:00:00

GDI LLC holds 1 block in total: see all. Source: IEEE Registration Authority public listing.