Green Bay, Wisconsin, is now using a "Twitter-like" system to send AMBER Alerts. Officials plan to use Nixle to send information about AMBER Alerts, fires, school lockdowns, crimes, and safety tips. The public can also sign up to receive alerts only about their specific neighborhood.

The Los Angeles Police Department is now using a new mass communication system called Nixle to notify the public about AMBER Alerts and other emergencies via text message or e-mail. Police Chief Charlie Beck said it is similar to “a professional-grade Twitter.” Nixle can send information and photos but the public must register to receive the alerts.