top of page

Systems on the Island of Oahu


There is a wide variety of different systems being used on the Island of Oahu and many of you are trying to figure out what does each system means for the public. Here's a list of the different systems used on Oahu and how is that going to affect the everyday scanner hobbyist and the general public. 

Please Click Here to view current weather conditions on the Island of Oahu

Please Click Here to view Resource Links for the Island of Oahu


For a list of the compatible scanners (brands and models): Click Here to see the list


Click here to see the full list of agencies/departments/businesses for the Islands of Maui County: 


City and County of Honolulu Public Safety System: New P25 Phase 2 - 800 MHz Simulcast system expected to come online in late 2021 replacing an existing conventional system previous in use by all City and County of Honolulu Departments. All Agencies including Fire, Police, EMS, Ocean Safety, and All-County Divisions made the switch allowing them to improve radio communications all over the island of Oahu. Currently, All radios are slowly being converted from an old Harris Communication system to a Motorola APCO P25 Phase 2 TDMA Simulcast System. This system will also include Medicom System (only in the State of Hawaii that is tied with a County Radio System) and will also undergo the Phase 2 conversion and is planned to go encrypted once completed. (We will update you on this page once that occurs).


Currently, Scanner with the Pro-Voice Capability is able to decode the system the City and County of Honolulu currently run on and eventually will be able to listen to on other scanners once the conversion is completed. 


To learn more about the Project 25 system, Click here to learn more about the digital system and the types used throughout other states. 


State of Hawaii Airports: Communications currently at Honolulu International Airport (Daniel K. Inouye International Airport) currently run under the Project 25 system (P25 Phase 1 system). It's a mixture of Conventional and Digital voice channels similar to how a phase 2 system works. Currently, each airport system runs under a simulcast system under one assigned central tower location on Airport property, allowing for full coverage around the entire airport property. Primarily used only by Airport Police currently, are underway to update the system to include other airport divisions in the future, thus allowing for all divisions to be patched on one channel for joint communications during an emergency. 


To learn more about Project 25 Phase 1, Click here to learn about the different phases in the P25 operating system and types. 


State of Hawaii Operations: Communication operations vary by department and agency. Currently, most departments still run on an analog system and eventually merging to the Hawaii Islands Region Interoperability Network (a P25 Phase 1 system) in the near future. No timeline on when that will happen, but only a handful of agencies have been integrated into the system and currently using it.

Please Click Here to view Hawaii Wireless Interoperability Network (HIWIN)


Island of Oahu Businesses: Most businesses still operate under analog systems and few businesses have switched to a digital/conventional system since 2010. Most businesses operate low-power radios (similar to consumer 2-way radios) and can be heard on analog scanners. 


To see what businesses radios operate under, visit the Island of Oahu Businesses tab  

bottom of page