(KAIR)--The CodeRed notification system, used by Atchison County to notify residents of matters ranging from burn bans and boil water notices to dangerous storms or other threatening weather, is back online.

On Wednesday, residents signed on to receive notifications were to receive a test message confirming the system was online; however, a release from the County says they are "aware that some residents—particularly AT&T and Apple iPhone users—may not have received...[the] test phone call due to call-screening features on certain devices and carriers." As of Thursday, the matter was being looked into, with the County saying they "will share updates as [they] learn more."

Additionally, the County Wednesday said "automated Weather Alerts are still not available, but are expected to be restored soon."

The outage, first announced November 19 by Atchison County Emergency Management, was due to what the County calls "a targeted cybersecurity incident" against OnSolve, the company behind the CodeRed system, which experienced nationwide problems. 

According to County Emergency Management, "OnSolve has confirmed that contact information from CodeRED user accounts was compromised during the cyberattack, and the compromised data does appear to have been published online; and, while there is no evidence that this information has been misused, residents should take precautions," such as changing their account password.

The County, citing OnSolve, says the most recent data backup available during the migration, following the cybersecuirty attack, was from March 31, of this year, with those who signed up for the CodeRed service after that date asked to "please check to ensure you are still enrolled for notifications."