90:4E:91:7 IBM
Every MAC address from 90:4E:91:70:00:00 to 90:4E:91:7F:FF:FF belongs to a block the IEEE assigned to IBM. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 90:4E:91:7 belongs to
Written 90:4E:91:7, 90-4E-91-7 or 904E917, depending on the system. Look up a full address.
Prefix
90:4E:91:7/28
Organization
IBM
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
90:4E:91:70:00:00
Last address
90:4E:91:7F:FF:FF
Address type
Globally unique, unicast
Registered address
9000 south rita rd Tucson AZ US 85744
Parent block
Inside 90:4E:91
This MA-M block is carved from the 24-bit block 90:4E:91, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.
Same organization
Other blocks assigned to IBM
6 more blocks registered under the same name.