Are they still doing blocks so configuring either Google's DNS or Cloudflare DNS will still unblock the sites?
It not until recently ISPs got asked to do blocks by IP, as Cloudflare wasn't responding to legal takedown requests, hence we currently seem to experience both types of blocking, but the IP-based blocking happens a few hours per week, the other ones are permanent.
They've got a license to stream LaLiga on Movistar Plus so they're particularly interested in blocking piracy.