Can you change your main domain's name?

[A1Rhosting]

Is it possible?

 

[A1Rhosting]

Bump..

 

[essellar]

Only to another x10Hosting-provided subdomain, and then only by a request here. And you should probably consider it an extraordinary measure. If you wish to use a different, externally-provided domain, you'll need to use it as a parked domain (an alias for your main domain) or as an add-on domain.