f Has a ::f1d0:<zone>:<net>:<node> style host address.
(zone, net, node in decimal notation)
IO Incoming only (Node can not make outgoing IPv6 calls)
OO Outgoing only (Node can not accept incoming IPv6 calls).
INO4 No IPv4 (Node can not accept incoming IPv4 calls).
PO4 Prefers Out on 4 (Node can make outgoing IPv6 calls,
but is configured to try IPv4 first)
6DWN The IPv6 connectivity of this node is temporarely down.
NO6 The node no longer presents an IPv6 address in the nodelist
and will soon be removed from this list.
HOLD The node is temporarely off-line. Mail may be routed.
DOWN This node is Down for both IPv4 and IPv6 and will be
removed from this list if the condition pertains.
PM Prospective Member. The node has demonstrated IPv6
capability but is not listed or does not advertise an
IPv6 address in the Fidonet nodelist yet.
PM *1 [2600:3c01::f03c:91ff:fe2b:c319]
To make an IPv6 connection to a node connected via 6to4 tunneling
one may have to force the mailer into IPv6 (-6 option in binkd's
node config for binkd up to 1.1a-96, -64 option for binkd 1.1a-97
and up when compiled with AF_FORCE=1). If the destination address
is a 6to4 tunnel address (2002::/16) many OSs default to IPv4 if
an IPv4 address is present.