James Martin/CNET

A nationwide outage for CenturyLink customers, including those trying to reach 911 emergency service, dragged on for the better part of two days before its resolution late Friday.

The outage hit customers of CenturyLink, a phone, internet and TV service provider, in areas including Idaho, New Mexico and Minnesota. The company's site lists residential services in 35 states.

It also affected 911 service across the country, prompting nationwide alerts to cellphones.

The Federal Communications Commission said Friday that it's launching an investigation into the disruptions.

As of about 6 p.m. PT on Friday, the problem seemed to have been resolved. CenturyLink said in a tweet that "all consumer services impacted by this event, including voice and 911, have been restored" and that any latency issues would be cleared within a few hours.

CenturyLink has been dealing with a network event. All consumer services impacted by this event, including voice and 911, have been restored. Any latency issues will clear in the next few hours. — CenturyLink (@CenturyLink) December 29, 2018

CenturyLink has not yet given any indication what caused the problems.

DownDetector reported initial signs of the outage around 1 a.m. PT Thursday.

"Our network is experiencing a disruption affecting customer services," CenturyLink tweeted Thursday morning. "We know how important services are to our customers and are working to restore services as quickly as possible."

On Friday morning, the Louisiana-based company tweeted that it was continuing to experience disruptions. It earlier expected to restore operations by Friday.

Restoring impacted services for our customers is very important to us. We are seeing good progress, but our service restoration work is not complete. Our teams are continuing their efforts to resolve these issues and we will continue to provide updates throughout the day. — CenturyLink (@CenturyLink) December 28, 2018

A company representative confirmed that efforts continue.

As of Friday afternoon, the company said on Twitter that it's "made progress in restoring services across the network in the last several hours. We are focused on resolving remaining issues."

The FCC steps in



FCC Chairman Ajit Pai called the disruption of service "particularly troubling" in its "breadth and duration."

The effect on people's ability to reach 911 emergency services is "completely unacceptable," Pai said in a statement. He added that he has been in contact with CenturyLink to emphasize the urgency of restoring service and that he would be monitoring progress closely.

The nationwide @CenturyLink service outage and the delay in restoring critical 911 capabilities is unacceptable. I have spoken to CenturyLink to express my concerns and have directed the @FCC’s public safety staff to launch an investigation. My statement below. #publicsafety pic.twitter.com/HgQas1xtyB — Ajit Pai (@AjitPaiFCC) December 28, 2018

CenturyLink didn't immediately respond to a request for comment on the FCC's investigation.

Originally published Dec. 27 at 1:47 p.m. PT.

Updated Dec. 28 at 9:09 a.m. and 2:03 p.m. PT: Added company comment about progress toward restoring service and added FCC Chairman Ajit Pai's comment.

Updated Dec. 29 at 4:57 a.m. PT: Added CenturyLink's statement that service has been restored,

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