"Comcast says cut fiber triggered nationwide outage and may impact other providers... Comcast said Friday that there is an interruption of its internet, video and voice services, related to a cut fiber at one of the company's large network partners. '“One of Comcast’s large backbone network partners had a fiber cut that we believe is also impacting other providers. It is currently affecting our business and residential internet, video and voice customers...' Comcast said in a statement... Comcast said at about 2 p.m. EST it did not yet have an ETA on when service would be restored..." https://www.cnbc.com/2018/06/29/com...ide-are-experiencing-a-service-interrupt.html
"Comcast said on Friday that two "separate and unrelated" fiber cuts in its network backbone providers were to blame for a major national outage as the company worked to restore service. 'We identified two, separate and unrelated fiber cuts to our network backbone providers,' Comcast said..." https://www.crn.com/news/networking...-it-works-to-restore-service.htm?itc=most_pop
Comcast's Xfinity suffering nationwide outage August 6, 2019 https://www.engadget.com/2019/08/06/comcast-infinity-nationwide-outage/