Pascal Gloor wrote:

I'm urgently looking for Marcel Leuenberger, BIT. He's currently out of office. If anyone knows how to reach him, perhaps on his mobile, could you please ask him to call me back ASAP on my mobile (whois RIPE objet PGL-RIPE for my mobile number)

Either of the people listed in BIT1-RIPE should be able to help you on BIT related networking issues.