Comment by rmccue

Nexstar's stations blocked access from European IPs, providing a 451 Unavailable for Legal Reasons response code; Nexstar are the largest TV station owner in the US, so a large number of sites for local affiliates were unavailable. I think other networks (Sinclair) may have also one so.

Here's a HN thread about it: https://news.ycombinator.com/item?id=27854663

(I worked with Nexstar and experienced this directly. Looks like this may have changed recently.)