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--- We are now using the Frequentis LinkedIN site --- Since 1989, C4i has led advancements in secure communications for the world’s most demanding mission-critical environments. C4i’s interoperable communications solutions are used by defence, governments and industry in more than 35 countries. C4i products enable rapid response times, interoperability and flexible asset utilization, and provide customers with ongoing cyber security protection. Based in Melbourne, Australia, the C4i team design, manufacture and integrate communications solutions for clients all over the world. From its Australian roots, C4i quickly established itself globally by winning local and international business. It has gone from strength to strength with various parent companies through a series of acquisitions and mergers: 1989 - Redflex 2006 - Longreach 2013, 2015, 2019 – ITT Exelis, Harris Corporation, L3Harris Technologies 2021 - Frequentis For any enquiries, please contact us on www.c4i.com and we'll put you in contact with someone to discuss your specific interoperable communications needs.

Website http://www.c4i.com
Revenue $14.2 million
Employees 125 (42 on RocketReach)
Founded 1989
Address 380 St Kilda Rd, L3, Melbourne, Victoria 3004, AU
Fax +61 3 9699 2896
Technologies
Industry Telecommunications, Telecommunications General, Radio-Over-IP, Radio Dispatch, Radio Remote Control, Secure Voice Conferencing, Networked Radio and Telephony Solutions, Radio-IP Gateways, Voice Communication Systems, Mobile Dismount Applications
Web Rank 22 Million
Keywords Communication Solutions, Mission Critical Systems, Secure Networks, Network Security, Defense Communications, Government Communication, Reliable Communication, Command And Control, Communication Technology, Critical Infrastructure, Integrated Systems, Systems Integration, Data Security, Voice Communication, Global Communication, Public Safety, Emergency Services
Competitors Northrop Grumman, BAE Systems, Raytheon Co., Thales, Collins Aerospace, Sierra Nevada Corporation, Elbit Systems Ltd, General Dynamics, Lockheed Martin, L3Harris Technologies +48 more (view full list)
SIC SIC Code 366 Companies, SIC Code 36 Companies
NAICS NAICS Code 334 Companies, NAICS Code 33 Companies

C4i Questions

The C4i annual revenue was $14.2 million in 2026.

Martin Rampl is the Director of C4i.

42 people are employed at C4i.

C4i is based in Melbourne, Victoria.

The NAICS codes for C4i are [334, 33].

The SIC codes for C4i are [366, 36].

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