Site uses osm map with no "© OpenStreetMap contributors"

Hi,
This site http://mapio.net/ http://mapio.net/uk/ http://mapio.net/cz/ uses the openstreetmap but cannot detect the © OpenStreetMap contributors.
Is there someone of the Czech forum that can contact the owner.

Jakka from Belgium

Had posted in UK forum see:
http://forum.openstreetmap.org/viewtopic.php?id=54894

We will notify them. Thanks.