Andy Grawehr writes:
> when i check our prefix 193.105.5.0/24 on www.ris.ripe.net i get an
> overlapping prefix: 192.0.0.0/3 announced by AS3303.

Google "AS3303 semi-default".  AS3303 announces this /3 to their
customers and possibly use it internally.  It's part of an elaborate
mechanism to trade off routing table size against path quality.

Some ISPs (including ourselves) even announce 0.0.0.0/0 to customers.
Note how this also "overlaps" with your 193.105.5.0/24.

Best regards,
-- 
Simon.


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