You can checkout these feature requests or bug reports if you want to improve this repository. Additionally, below are some other ideas you can implement:
No 1 - Update USAF aircraft to use Reg/serial number in place of Ident/Callsign.
- RAF Typhoon Display Team
- Breitling Jet Team (not complete)
- US Dept of Interior
- US Dept of Energy
- Other US Gov Depts
- B737 with Gravel Kits - Nolinor, Air Inuit, Canada North, Chron Aviation
- Defense Helicopter Flying School
- Identify more aircraft owned by Religious organisations
- Acrobat Ltd (Uk Gov Sock puppet ?)
- UK Ministry of Defence
- UK Border Force
- Shuttleworth Collection
- Other Warbirds
- List of DA42 MPP / DA62 MPP Operators
- Thales UK
- Survey / Mapping aircarft
- Other surveillance aircraft types
- 750 Naval Air Squadron (Observers)
- Coulson Aviation
- Australian Aircraft called firebird (fire spotter and fighters)
- S-64 Skycrane - list only partially completed (what is the list of names)
- Japanese Flying Boats Shin Maywa US-2/US 1 (US2 are 9901 through 9907 - mode-s ?)
- Private Adversary Squadrons (Air Usa etc.)
- Operators of old Jets/Fighters (e.g. Hawker Huner Aviation)
- Callspan Corp In-Flight Simulators
- GAMA Avaiation (ex RAF spy planes)
- Flying Hospitals (eye Hospital ?)
- Other Coast Guards (e.g. USCG)
- Air Ambulances (Wikipedia List)
- Big Russian Helis
- Babcock MCS Spain (and any other countries)
- Lewis Hamilton Jet(s)
- Open Skies Flights
- European Union
- Scientific/Weather planes
- Flight Precision Ltd (and Similar)
- World Bank etc
- Red Cross / MSF
- Special Conversions e.g. Engine testbeds
- Duxford and other historic flight collections
- Historic Aircraft Flight Trust
- Low-volume Airliners / Special Models
- Football Teams and other sporting organisations
- Beechcraft RC-12 Guardrail
- Meteorological research flights
- Film and Television Companies
- News Choppers
- RCAF Snowbirds
- RAAF Roulettes
- Helicopter Transport Services
- Arena Aviation
- Slagboom & Peeters nv (Aerial Surveys)
- Air Affairs Australia
- ADAC Germany
- Denmar Technical Services (Stealth radar testing)
- IAS Medical (Air Evac)
- Aviation Services Australia
- Historic Army Aircraft Flight
- Odd C130 Hercules - EC130H, EC130E, EC130J, MC130H, WC130J
- AeroRescue
- Air-Glaciers
- Alci Aviation
- Baltic Bees Display Team
- Bundesamt für Landestopografie
- Bundesamt für Zivilluftfahrt BAZL
- Bundespolizei
- GFD.de
- Royal Flying Doctors Service
- Top Aces Inc.
- Russian FSB
- Aircraft and companies in this article - https://www.cjr.org/watchdog/how-buzzfeed-news-revealed-hidden-spy-planes-in-us-airspace.php
- Chapparral Air Group
- Acorn Growth Companies
- Aircraft owned/Operated by Sultan/State of Brunei (esp his very plush 747)
- Aircraft - Lake Renegade
- Special Hurons - MC-12W, MC-12S, RC-12H, RC-12N
- Edgley Optika
- Columbian C47 Gunships - Got 1. Are there more?
- Artic and Antarctic Aircraft (Got some - but are there more ?)
- Thunder City (SA Company flying old jets)
- Meta Special Aerospace
- FAA and CAA
- US Missile Defence Agency
- A4 Skyhawks
- Italian Guardia di Finanza
However any other idea's are also welcome.