What is this service?
Use the information on this page to learn more about one of San Luis Obispo County's alert and notification systems, known as Reverse 911. Reverse 911 allows emergency officials to notify residents and businesses in a designated area of an emergency and actions they may need to take.
The Reverse 911 system does require registration of cellphones and Voice-over IP (VoIP) phones before messages will be received. Landlines are included in the system.
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 @noemail.com 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.