Some CenturyLink customers across the country were without the internet as outages stretched from NY to California, including in Kansas.
It was caused by a "network element" that was impacting services and fully restored service was expected within hours.
Neither company indicated how many customers were affected.
The state Utilities and Transportation Commission said interruptions began about 8:30 p.m. Thursday. While service has been restored in some areas since then, not all systems are back up and running.
The outage also did not affect text-to-911 in all areas where that feature is available.
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 Friday.
State police spokesperson Dave Procopio said early Friday morning that the department believed the outage knocked out 911 emergency call services for wireless users in the Bay State.
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"When an emergency strikes, it's critical that Americans are able to use 911 to reach those who can help", chariman Ajit Pai said in an FCC press release.
"The CenturyLink service outage is. completely unacceptable, and its breadth and duration are particularly troubling", Pai said in a statement.
In 2016, the Washington Utilities and Transportation Commission fined the company almost $3 million for failing to reroute emergency calls during a 6 hour service outage in 2014. "I have also spoken with CenturyLink to underscore the urgency of restoring service immediately".
On Friday afternoon, more than 24 hours after first reporting the outage, CenturyLink's twitter feed said: "While our network is experiencing service disruptions, where CenturyLink is the 911 service provider 911 calls are completing".
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