National Emergency Number Association
NENA's mission is to foster the technological advancement, availability, and implementation of a universal emergency telephone number system. In carrying out its mission, NENA promotes research, planning, training and education. The protection of human life, the preservation of property and the maintenance of general community security are among NENA's objectives 

Association of Public-Safety Communications Officials
The Association of Public-Safety Communications Officials - International, Inc. - APCO International - is the world's oldest and largest not-for-profit professional organization dedicated to the enhancement of public safety communications. With more than 15,000 members around the world, APCO International exists to serve the people who manage, operate, maintain, and supply the communications systems used to safeguard the lives and property of citizens everywhere. 

National Association of State 9-1-1 Administrators
The National Association of State 9-1-1 Administrators is a professional organization representing the 32 states that currently have a central 9-1-1 planning or administrative function.