ARRL/RRI National Traffic System
Useful information about the National Traffic System, traffic nets, packet, and message handling.
What is the National Traffic System?
The National Traffic System (NTS) is a volunteer network of amateur radio operators organized to pass formal written messages across the United States and Canada. It was created to support public service, emergency communications, and routine traffic handling by moving messages through a chain of nets and stations.
ARRL and RRI Roles
ARRL NTS
The American Radio Relay League maintains the NTS structure and offers information on traffic handling, nets, and training.
Visit ARRL NTS →Radiogram Relay International (RRI)
RRI promotes formatted message handling and radiogram accuracy for amateur radio traffic operators.
Visit RRI →ARRL Radiogram
Learn the standard radiogram format used to pass messages through NTS and formal traffic nets.
Learn Radiogram →Traffic Nets
Traffic nets are the backbone of NTS, where operators pass messages on scheduled frequencies.
Traffic Net Info →How NTS Works
- Local nets receive and deliver messages in their coverage area.
- Region nets move traffic between areas and connect to the national network.
- Area nets and section nets relay messages across longer distances.
- Formal radiograms are passed using a standard format with preamble and text.
- Messages are handed off from net to net until they reach the destination area.
Getting Started with Traffic Handling
- Listen to local traffic nets on HF or VHF to learn net procedures.
- Practice copying and filling out a standard radiogram form.
- Learn net check-in, handling instructions, and delivery procedures.
- Ask an NTS net control operator for coaching or a mentor.
- Participate in exercises and public service events to build experience.
Useful Resources
ARRL NTS Manual
Official guidance for traffic handling, nets, and message format.
ARRL Traffic Resources →Digital Traffic Modes
Use Winlink, FLmsg, or packet to send formal traffic electronically.
Winlink →