IEEE OUI-36 8C-1F-64-FA-A registry

Massar Networks has been assigned by the IEEE OUI-36 registry MAC Address Block Small (MA-S) the block 8C-1F-64-FA-A / 8c:1f:64:fa:a.

Along with the EUI-48 block of 4096 MAC addresses: 8c:1f:64:fa:a0:00 through 8c:1f:64:fa:af-ff which also provides EUI-64 prefixes for for instance IPv6 autoconfiguration. We use these MAC address assignments (EUI-48 and EUI-64) on our network equipment that we provide to customers. This to aid in debugging in case our devices cause issues or incompatibities, they can with this easily be recognized.

It also allows us to statically assign MAC addresses to important interfaces, which then can be easily identified and as they are static can be swapped to other interfaces in case an interface has hardware issues, without having to notify external parties of such a change. This makes for instance IX connections much easier. Alternatively, when one does not want to use public MAC addresses, one could of course force the link-locals to be in the form of fe80::<n> and number them sequentially, as the IP is link-local and one controls the link this can work rather well.

Contact

In case of questions regarding MAC addresses in this range, don't hesitate to contact us and we can either investigate the affecting device setup ourselves, when in our possession/operation or contact and help the customer to debug their setup.

Public Assignments

A few mostly publicly notable MACs are listed below to indicate where they are used.

Other devices might not be connected to public networks directly, thus are not listed above.