Find the vendor name of a device by entering an OUI or a MAC address
MAC address 02:42:AC:xx:xx:xx
No IEEE assignment is found for this MAC: 02:42:AC:xx:xx:xx. Its U/L bit marks it as locally administered, rather than an IEEE hardware vendor assignment.
This prefix matches Docker's legacy IPv4-derived bridge MAC scheme, but does not prove that Docker generated this address.
Locally Administered Addresses (LAA)
A locally administered address was assigned locally rather than by the IEEE: the second-least-significant bit of its first octet is 1, which makes the second hexadecimal digit of a unicast address a 2, 6, A or E, or 3, 7, B or F for a multicast address. MAC randomization and manually assigned addresses both produce this form.
How Docker Generates This MAC (Embedded IPv4)
Docker's legacy bridge scheme prepended 02:42 to the container's IPv4 address, encoded in the last four octets. For example, 0xAC = 172 and 0x11 = 17.
Candidate embedded IPv4: 172.17.0.2
This is a decoding of the legacy pattern, not a verified current IP address.
Docker Engine 28 switched bridge interfaces to randomly generated MAC addresses. Other tools or operating systems can also generate the 02:42 prefix.
Octet 0 Structure & Docker Bit Architecture
Allows Docker daemon to generate virtual MACs without IEEE registration collisions.
Direct point-to-point veth container delivery.