Emergency 911 service was down in most of the state of Washington Thursday morning.

A spokeswoman for CenturyLink, Kerry Zimmer, said the problem began about 1:30 a.m. Thursday at Sheridan, Ore., and Oregon was affected for several hours. Service was completely restored around 8 a.m. in Washington state, according to CenturyLink.

CenturyLink provides the service statewide because the dispatch centers are all tied together.

Anna Pendergrass, head of the Clark Regional Emergency Services, said she was told that a network card in the system was faulty. When CenturyLink went to replace it, the system crashed.

She said there have been outages in the past but none this long. She said she would be asking state officials later Thursday why no backup system kicked into place.

For a complete statewide list of alternate emergency numbers in the event of a 911 service outage, visit: http://www.apcowa.org/psap.htm