Is it possible to block a particular domain name from a server?

There are a couple of domains that are nothing to do with me, that must have accidentally used my IP in their a entries for name servers etc. As such their address shows up my webspace and so I wondered if I can somehow just block a domain name from use of my server?

Someone told me that this was a kind of phishing, am not sure how that would work, but have been a little concerned about it for a while and my hosting company who i rent a dedicated server from have not been able to help much about it except to change IP of my site, which at least means that these domains are not mirroring my site and just show a default page when visited. However I have these 10 IP addresses and would much like to be able to stop anyone else from using my ip addresses obviously.

I have written to domain resellers and registrars, but dead end there so just wondered if there is anyway to block a domain name from a server?

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what OS are you using?

I think you need to explain your situation more.
Like what kind of server is this, OS, etc...

Also, what does this mean?
Since you are leasing a dedicated server, there is a likeliness that these domains used to be on this server before you

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