It looks like this machine is using another name server than other machines, and this name server doesn't list the correct (new) IP address for your domain. If you change a DNS record, it at first is only changed in the name server you changed it at. So if a machine uses another name server, it still gets told that your site is at the old IP. But name servers "talk to each other" on a regular basis and update their records accordingly. This of course takes some time. As a rule of thumb, after 24 hours most name servers should "know" about a change. Sometimes it goes faster, sometimes it takes more time.

If after about 24 hours your browser still gets directed to the wrong (old) IP, you'd want to take a closer look at your network settings and/or talk to your internet provider.