You will need to go through whoever you register and see if they offer privacy options.
Another thing you can do is rent a PO box(what i do) and optionally get a DBA(doing business as). If you don't want to give your phone number away, you can get a google voice number and screen unknown callers(what i do)
If you are talking about your x10.mx domain, there is no Whois info for subdomains.
If you are talking about your .com domain, masshuu is talking about the place you bought the domain name. They are the ones who you have to go to in order to have the Whois info hidden. x10hosting has nothing to do with it.
EDIT: Sorry, looked at the Whois info a bit closer. I see:
Results returned from whois.advancedregistrar.com:
Registration Service Provided By: X10HOSTING
Contact: +888.9109668