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bksneezy wrote:

I have a website that can be reached using COMCAST and VERIZON internet service, but not by ANY AT&T service (iphone, UVerse or T1). (www.urnow.com)  The traceroute fails to get past the IP after 172.16.121.114 on my iphone (next one should be 12.249.2.53 followed by 12.83.180.94 - both owned by AT&T).   If i use WIFI on my iphone from my COMCAST home network, I can get to the web site on my IPHONE, but not using celluar data.  I do receive a 502 error message on the phone and IPad.  I thought it might be the web server, but if i can get to it using COMCAST and also VERIZON networks but not AT&T, im thinking that it would be a AT&T network problem.  Any ideas welcome!  Don't know if this matters, but both AT&T ip's listed above that start with '12' show to be blacklisted when running the 'blacklist' tool on network-tools.com  

 

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Works for me once I removed the close parentheses you had on there. A website I like using whenever I'm not sure if a site is down for me or everyone is http://www.downforeveryoneorjustme.com/