Address Tracker Data Model Address Tracker module draft. A 64-bit key for this observation. This is opaque and should not be interpreted. MAC address IPv4 or IPv6 address VLAN id Timestamp (number of ms since January 1, 1970, 00:00:00 GMT) of observing this address for the first time The most recent timestamp (tnumber of ms since January 1, 1970, 00:00:00 GMT) of observing this address