A4:58:0F:3 Engineered SA
Every MAC address from A4:58:0F:30:00:00 to A4:58:0F:3F:FF:FF belongs to a block the IEEE assigned to Engineered SA. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who A4:58:0F:3 belongs to
Written A4:58:0F:3, A4-58-0F-3 or A4580F3, depending on the system. Look up a full address.
Prefix
A4:58:0F:3/28
Organization
Engineered SA
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
A4:58:0F:30:00:00
Last address
A4:58:0F:3F:FF:FF
Address type
Globally unique, unicast
Registered address
Avenue des Sports 28 Yverdon-les-Bains VD CH 1400
Parent block
Inside A4:58:0F
This MA-M block is carved from the 24-bit block A4:58:0F, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.