When I Ping to the DNS IPv6 of comcast, they do not respond

Hi, there @renzouribe! Thanks for reaching out to Comcast Business over our forums page. I am sorry to learn about this experience with the ping not responding. As a small business owner myself, I understand how important it is to have your internet service working correctly. We can help. To research this further, please send us a direct message with your first/last name and full address. You can start by clicking the "message" icon in the upper right page of the forum page. Once you click on that, input our shared handle Comcast Business to send us a direct message.