Multiple enforcement agencies are investigating CenturyLink's nationwide outage that has disrupted 911 emergency services.
The U.S. Federal Communications Commission's chairman called the "breadth and duration" of the outage "particularly troubling" and "completely unacceptable." Regulators in the state of Washington are also probing what left people unable to access emergency services in some areas -- in addition to Missouri, Idaho and Arizona.
Customers began reporting issues with CenturyLink's internet, phone and TV services early Thursday morning.
Since then, the outage has also affected the ability to make credit card sales, use ATM machines and access medical records.
Additional reporting from Newsy affiliate CNN.