Reverse 9-1-1

San Luis Obispo County officials may chose to utilize the Reverse 911 system for any emergency taking place in the county. This telephone notification system utilizes the 9-1-1 telephone database and therefore is able to contact listed and unlisted land-line telephones. 

If you have a Voice over IP (VoIP) or cellular telephone that you would like to be notified on, you must self-register those telephone numbers. 

The Reverse 911 system is managed by the San Luis Obispo County Sheriff's Department and can be used county-wide.  Although the system is used primarily for disasters which require the public to take action, it may also be utilized in other emergencies such as high risk missing persons.

Register your devices below or visit the Sheriff's Office website to sign up for Reverse 911


If you are having difficulties with online registration, please fill out this form and return it to the County Office of Emergency Services. We will manually enter your information into the system.

Note* If you do not have an email address and would like to register for Reverse 911, use as your email.

Reverse 911 is just one of the alert and notification systems that emergency officials may use to alert San Luis Obispo County residents of an emergency. Find more information on other alert and notification methods.  In addition to Reverse 911, San Luis Obispo County also has the ability to utilize the Wireless Emergency Alert system.