Two Way Radios
- Supply two way radios, walkie talkies and accessories. Nottinghamshire based.
- http://www.twoway-radios.co.uk

RadioReference.com LLC
- Provides reference information including news, local frequencies, and a wiki.
- http://www.radioreference.com/

Mobile Relay Associates
- Specializes in the engineering, installation, maintenance and security of repeater systems and repeater sites, leasing of service and equipment sales and service.
- http://mra.homestead.com/

Two Way Radio Directory
- A comprehensive directory of two way radio, mobile data, and other wireless communications resources.
- http://www.twowayradiodirectory.com/

Air Radio Ltd
- Mobile voice and data communications for airlines, airports and ground operation companies in mission critical environments.
- http://www.air-radio.com

Empire Communications
- On the jobsite in San Rafael or in the Sonoma workplace, professional 2-way radios provide instant communication with individuals or multiple groups. They operate on exclusive business frequencies, which helps limit congestion. Some solutions require FCC
- http://www.empirecomm.net/

Halcom Communications Ltd.
- Provides mobile global communications equipment, satellite phones, worldwide paging, security monitoring, medical alarms, GRS radio, call centre and dispatch.
- http://www.halcom.ca

International Wireless Communication Expo
- Annual convention for two-way radio manufacturers. Held in Las Vegas, Nevada. Includes exhibitor list and registration information.
- http://www.iwceexpo.com