A number of major websites, including Delta Air Lines, Costco, AT&T and more, were down on Thursday in what appears to be a widespread internet outage.

Content distribution network (CDN) Akamai said that it is "aware of an emerging issue" with its Edge DNS service and are "actively investigating the issue."

Users reported issues with a number of prominent websites to Down Detector, including Southwest Airlines, Home Depot, FedEx, UPS and more. Attempting to reach those websites resulted in slowdowns, reduced services, or errors preventing any access at all.

Other sites and services reported to Down Detector include:

  • Walt Disney World
  • Chase
  • Oracle
  • Playstation Network
  • Fidelity Investments
  • Charles Schwab
  • Vanguard
  • HBO Max
  • Groupon
  • Cloudflare
  • Amazon Web Services
  • Steam

"We’re experiencing temporary technical issues serving our customers on delta.com and the Fly Delta mobile app," a message on Delta's website reads. “We apologize for the delay, and are working to restore the site as quickly as possible."

Delta directed customers needing immediate assistance to call, or if checking in for a flight, refer to a gate agent at their departing airport.

This is a developing story. Check back later for further updates.