Check what name severs are hosting the domain and try resolving directly from them.
atbfinancialonline.com name server dns1.cidc.telus.com. atbfinancialonline.com name server dns2.cidc.telus.com.
<vbg> I shoulda done that:) Yup, so it's only resolving from cache for those that did hit it I see.
telus, sounds Australian ..seems like dns1.cidc.telus.com is not responding.
Calgary Alberta Canada! Wrong side of the planet:)
One of my Debian servers has a tool called 'dnstracer', I'd be surprised if it was available as part of the stock CentOS but maybe available in a 3rd party repo or some similar tool:
Nice tool, thanks Nate! jlc