Frontier communicates with a number of hosts over HTTP (TCP port 80) and HTTPS (TCP port 443). Please ensure the following hosts are accessible through your firewall and/or content filter:

  • frontier.esparklearning.com
  • frontier-api.esparklearning.com
  • cdn.esparklearning.com
  • media.esparklearning.com
  • media-files.esparklearning.com
  • media-files.esparklearning.s3-us-east-2.amazonaws.com
  • airbrake.io
  • esparklearning.asknice.ly
  • google-analytics.com
  • intercom.io


If your filter/firewall allows it, please whitelist *.esparklearning.com


If you require additional assistance, please e-mail support@esparklearning.com.