Comcast business customers nationwide lost phone service for the second day on Thursday.

A Comcast spokesman confirmed what people were reporting to the website downdetector that lit up in red with reports outages around noon. He said the outage was for those who subscribe to Comcast business services — not homeowners.

The spokesman, Matt Helmke, said that at 4:10 p.m. service had been restored.

"Our engineers identified the issue and have restored services for Comcast Business Voice and Voice Edge Select customers," Helmke said in a statement "We are continuing to actively monitor this and are fully investigating the root cause, but our first priority is to ensure all customer services are working. If any customer continues to experience issues they should reach out directly."

Comcast complaints spike on downdetector because of phone outage.
Comcast complaints spike on downdetector because of phone outage.

Philadelphia was part of the outage.

Through the nation, Comcast users were taking to downdetector to complain.

"Comcast phone down again 12:30 p.m. in Atlanta," wrote Andy in Atlanta on the site today.

"Phone down in metro Detroit area anyone has an eta I can't get thru to Comcast???" asked Kristol Benning an hour ago.

"down in sf bay area again," added Leane Ritchie.