U-Verse Internet Can't connect to one website I need for work [ Edited ]

[MoniqueB69]

About 3 weeks ago, I stopped being able to connect to several websites I maintain for work.  mykidsisterclothing.net, fivedollarjewelrysale.com, sunday-church-suits-for-less.com.  I am not able to connect via any computer in my house.  We are not having any problems on our UVerse TV or Phone.  I have called tech support so many times.  I have done all the basic steps to no avail.  2 techs came out and  changed out the boxes from the new black box to the old motorola box and now back to the new black box.  Everytime they come out and change boxes I am able to get on for a few hours and then I am kicked off.

[Edited to comply with Guidelines - removed links]

[texasguy37 ACE - Champion]

I am also unable to access those websites using the links in your message. 

The first two links have "%2C" on the end.  When I remove those, I can connect:

mykidsisterclothing.net

fivedollarjewelrysale.com

If I remove the "." from the last link, I can connect:

sunday-church-suits-for-less.com

[Edited to comply with Guidelines - removed links]

[MoniqueB69]

I am now able to get on.  It's an now happening intermitten. I am up for 3-4 hours then I can't connect.  The service was timing out.  Did a tracert on my end and it timed out after reaching AT&T's server in my area.  Any ideas why the service is so bad?

[JefferMC ACE - Wizard]

Why do you say "the service is so bad?"

[foxcd]

If it's only having issues on one computer check your hosts files:

C:\WINDOWS\system32\drivers\etc 

Make sure there are no entries for those sites.

[MoniqueB69]

No its on all computers in my house including my phone when I am connected to WiFi.  Once I turn it off I can connect via AT&T on the phone.  All browsers as well.  I had a tech tell me that it was the browsers.  NOT!  Chrome, Firefox and IE give me the same time out message.  Like I stated in my message, the AT&T U-Verse internet was working fine 3 weeks ago and now it isn't working for me to get to my websites for work.   I am calling the service what it is if I can't get to my work website.  BAD!!! For everyone else who doesn't use the internet for work its fine.  I need it for work not play. 

[aviewer ACE - Wizard]

MoniqueB69 - I do not see that you tried a different DNS server. In your computer preferences - internet - network - find the DNS server & change it to 8.8.8.8. Which is google. Other folks like open DNS.

You may want to write down the current setting in case you want to change back.

[MoniqueB69]

aviewer (Czar) My webhost had me do the same thing on 2 different computers.  One running Windows 7 using IE and other XP with Firefox.  Neither worked.  I am really stumped on this one.  It probably is something simple but because I am so frustrated I am missing it.We both thought it might be a problem with Firefox.  

[JefferMC ACE - Wizard]

I am not on the AT&T network right now, and those addresses don't work for me.

On the first, the DNS resolves, but the GET request doesn't ever seem to get serviced.

On the second, I get this:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@mykidsisterclothing.net and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

In short, I don't think this is an AT&T problem.  Maybe "the service" that is "so bad" is that provided by your web host.