Officials in Sweetwater County, Wyoming resorted to publishing alternate phone numbers for those needing emergency services, as the CenturyLink outage affected the Sweetwater Combined Communications Center, which receives 911 calls for the region. Pai called the outage "particularly troubling" in a statement. The late-night phone call was sent at 11:30 p.m.to the entire Portland metro area, according to oregonlive.com.
But Friday, CenturyLink customers in Washington state and MA noted that the outages led to sporadic outages for 911 calls.
The company first acknowledged the problem on Thursday morning.
Jessica Rosenworcel, a member of the Federal Communications Commission, said via Twitter that this was a "nationwide outage" and her agency needed to investigate. KOMO reports that some CenturyLink customers reported receiving busy signals when dialing 911.
CenturyLink provides cell services to several carriers, including AT&T and Verizon - the outage didn't impact emergency calls from landlines.More news: Afghan President Says Possible U.S. Troop Withdrawal Won't Affect Security
But problems persisted through the early morning hours Friday.
Residential customers have also tweeted some harsh words, mostly about the lack of updates and customer service from CenturyLink. Telecommunications company CenturyLink tweeted Friday that it had been dealing with a "network event" and "all customer service" had been restored.
The 911 dispatch center and emergency management in western Missouri's Johnson County were hit by the outage, county Emergency Management Director Troy Armstrong said on December 28.
Many CenturyLink customers across the USA were without internet Thursday amid a lengthy outage that stretched from NY to California. The website Down Detector says it primarily affected western states, but emergency service providers on both coasts reported disruptions.
CenturyLink didn't immediately respond to a request for comment on the FCC's investigation. It fined AT&T $5.25 million for two nationwide outages in March and May of 2017 that lasted a total of approximately six hours, and resulted in the failure of 15,200 failed 911 calls.