As per changelog, Tor, starting with 0.4.6, no longer publishes any DirPort:
Removed features (relay):
Because DirPorts are only used on authorities, relays no longer advertise them. Similarly, self-testing for DirPorts has been
disabled, since an unreachable DirPort is no reason for a relay not to
advertise itself. (Configuring a DirPort will still work, ...