Your device - be it a computer, a tablet, or a phone - can connect to the Internet because it has a NIC. So a MAC address - I’ll call it MAC from now on - is precisely that, the unique identifier to control the access of a network interface controller (NIC), which we often call a network adapter.

How to change the MAC address of a Mac computer.

How to change the MAC address of a Windows computer.

How to change the MAC address of a router.

Reasons you might want to change your MAC.Although it is possible to discover the CPE MAC address(es) of the cable modem, there is no application or procedure that requires them. USB-capable cable modems also have two further MAC addresses: one for the cable modem USB socket, and another for the emulated network interface in the USB driver in the PC. The HFC MAC address of the cable modem is stamped on the manufacturer's label on the back or underside of the cable modem, or on the label of the box in which the cable modem was sold.Ĭable modems might have multiple MAC addresses, one for the HFC side (cable TV coax socket), and one for the CPE side (Customer Premises Equipment, the ethernet socket). Some cable ISPs require you to register with them the HFC MAC address of your cable modem. This abbreviation refers to the port of the cable modem that connects to the CATV coax cable. The IEEE claims trademarks on the names EUI-48 and EUI-64, in which EUI is an acronym for Extended Unique Identifier. MAC addresses are formed according to the rules of one of three numbering name spaces managed by the Institute of Electrical and Electronics Engineers (IEEE): MAC-48, EUI-48, and EUI-64.

It may also be known as an Ethernet hardware address (EHA), hardware address or physical address.

If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number and may be referred to as the burned-in address. MAC addresses are most often assigned by the manufacturer of a network interface card (NIC) and are stored in its hardware, the card's read-only memory, or some other firmware mechanism. Logically, MAC addresses are used in the Media Access Control protocol sub-layer of the OSI reference model. MAC addresses are used for numerous network technologies and most IEEE 802 network technologies including Ethernet. A Media Access Control address (MAC address) is a unique identifier assigned to network interfaces for communications on the physical network segment.

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