unknown/undocumented AS numbers

["Christian Panigl, ACOnet/UniVie" <]

    Dear colleagues,
    
    does anybody have a hint for me where all those "unknown"/undocumented
    (usually 5digit) AS numbers are coming from ?  Who is assigning them ?
    How can they be identified ?  Sorry if this is a very stupid question,
    but I simply don't know where else to look for them (just an example, by
    "accident" I do know that AS11042 is used by LoralOrion):
    
$ whois -h whois.ripe.net -a AS11042
[...]
% No entries found for the selected source(s).
[...]


$ whois -h whois.ra.net -a AS11042
%%  No entries found for the selected source(s).


$ whois -h whois.arin.net AS11042
[...]
No match for "AS11042".
[...]

    Kind regards
    Christian

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