30:3D:51:3 S & A Systems
Every MAC address from 30:3D:51:30:00:00 to 30:3D:51:3F:FF:FF belongs to a block the IEEE assigned to S & A Systems. Network cards, phones and other devices it makes carry addresses from here.
Assignment
Who 30:3D:51:3 belongs to
Written 30:3D:51:3, 30-3D-51-3 or 303D513, depending on the system. Look up a full address.
Prefix
30:3D:51:3/28
Organization
S & A Systems
Registry
MA-M (28 bits)
Addresses
1,048,576
First address
30:3D:51:30:00:00
Last address
30:3D:51:3F:FF:FF
Address type
Globally unique, unicast
Registered address
992 Sids Rd. Rockwall TX US 75032
Parent block
Inside 30:3D:51
This MA-M block is carved from the 24-bit block 30:3D:51, which the IEEE holds as IEEE Registration Authority and divides among smaller assignees.