Motorola SURFboard SB6121 - Manual (Page 11)

1 OVERVIEW
4
Bottom Label on the SB6120
The label on the bottom of the SB6120 contains the Media Access Control (MAC)
address, a unique, 48-bit value permanently saved in ROM at the factory to identify
the cable modem on the network. To receive data service, you will need to provide
the
MAC address marked HFC MAC ID to your Internet Service Provider.