Site accessible from some places, not from others. New DNS problem?

Does anyone know why this may be happenning, or how to debug it?

Alot of my sites, will not show up in some parts of the country.
For example, if you go to http://www.alertra.com - and enter steelpanda.com - noyen.org - manyatta.com - etc. into the spotcheck, they are found just fine everywhere except los angeles. Lots of my users are e-mailing in asking why some people can't view their site. And it's not just people from LA.

So can anyone help me out with this, or atleast point me in the right direction on where to get some answers? I'm desperate!

Thanks alot.

 

 

 

 

Top