Protecting Tahoe's Communities Reverse 911 Services REGISTER FOR DOUGLAS COUNTY REVERSE 911 SERVICES TODAY! Cell phones, cable phones, and internet phones must be registered with Douglas County Reverse 9-1-1 to receive a call in the event of an emergency. Instructions to register: Visit the Douglas County Reverse 911 Registration Portal Agree to the conditions by checking the box Complete the registration form Follow the prompts to register After registering, an email will be sent to the email address used on the registration Open the email, and click the blue “CLICK HERE” to activate your registration