One website not loading.

Sorry for posting a problem as a first post but I'm about to throw my Macbook thru the window at the moment.
My problem is the following:

I can't open the website of one of my clients. Since I have 2 email accounts at this website I'm also unable to receive mail. I have listed a few conclussions so hopefully someone knows exactly what the problem is.

- I can't open the website or any website that's related to it on my macbook pro using several different wifi networks.
- I can't open the websites on my phone on a wifi network.
- I can't receive any emails from the address on my macbook

- I can open the websites on my phone on a 3G network.
- I can receive emails on my phone when not connected to wifi
- I can open the websites using www.hidden.cc (a proxy)

I tried flushing my cache using dscacheutil -flushcache but this doesn't help me.

My client didn't block me somehow

I hope someone here can help me. Thanks a million in advance!!

website?

5k.tv

have you cleared out all your cache? Get Onyx and run through it's cleaning section.

I did but it doesn't seem to work. The website is still not loading.

Have you tried simply using a different browser?(Probably stupid idea)
Have you edited your hosts file?
If you have AdBlock Plus addon sometime that blocks websites.

It might be getting blocked by your ISP for some reason. Have you tried on different ISP's?

I have now ran out of ideas.

I tried Safari, Firefox, Opera and Chrome. All are blocking that website or every website linked to it (some content is under another website). Also emails are not coming in.

I tried different wifi connections and different internet providers. All are not working. I believe that's what you meant with ISP's??

When I use my phone on a wifi network it isn't working. When I use my phone on 3G it is working.

It's driving me nuts. Maybe I'll have to go to the Apple Store here...?