What is a Blackout? How is my location determined if the event is …

If you are receiving blackout messaging on ESPN, check your local listings to find the television network carrying the event. If you see a message that states, “This content is subject to blackout”, this is because the event that you requested is not available on ESPN in your location. Your location is determined by your IP Address.  

https://support.espn.com/hc/en-us/articles/115003816892-What-is-a-Blackout-How-is-my-location-determined-if-the-event-is-blacked-out