A4:DA:22:7 Hydro Electronic Devices, Inc.
Every MAC address from A4:DA:22:70:00:00 to A4:DA:22:7F:FF:FF belongs to a block the IEEE assigned to Hydro Electronic Devices, Inc.. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who A4:DA:22:7 belongs to
Written A4:DA:22:7, A4-DA-22-7 or A4DA227, depending on the system. Look up a full address.
Prefix
A4:DA:22:7/28
Organization
Hydro Electronic Devices, Inc.
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
A4:DA:22:70:00:00
Last address
A4:DA:22:7F:FF:FF
Address type
Globally unique, unicast
Registered address
2120 Constitution Ave Hartford WI US 53027
Parent block
Inside A4:DA:22
This MA-M block is carved from the 24-bit block A4:DA:22, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.