The OP is n Hong Kong. so I guess he may be looking for colo services in Asia or the USA.
There's a directory of colocation hosting service when you can choose a desirable location of a DChttp://www.colocationconnect.com/unitedstates/index.html

Serverpoint.com have been in business for almost 10 years already, so I guess their level of expertise is extremely high. They offer to collocate servers in Las Vegas, Nevada.