Tracked flights
9
Lifetime CO₂
119.8t
Flight hours
30h
N503GS details and fuel burn
Tail
N503GS
ICAO
A645BC
Registered in
United States
Size class
Heavy
Fuel burn
410 gal/hr
CO₂ / hour
3,939 kg
Car miles equiv. / hr
9,749
Owner
Alternate Solutions Health Network
Category
Business
Where has N503GS flown? 10 recent flights
These are the last 10 flights we tracked for N503GS, newest first. The airports it used most are James M. Cox Dayton International Airport (KDAY), St Louis Regional Airport (KALN) and Paris-Le Bourget International Airport (LFPB).
- In flightKDAY — James M. Cox Dayton International Airport
- CompletedKALN — St Louis Regional Airport→KDAY — James M. Cox Dayton International AirportOct 20, 2026, 10:51 PM · 49m
- CompletedKALN — St Louis Regional Airport→KALN — St Louis Regional AirportOct 20, 2026, 10:06 PM · 20m
- CompletedKDAY — James M. Cox Dayton International Airport→KALN — St Louis Regional AirportSep 17, 2026, 07:34 PM · 51m
- CompletedLFPB — Paris-Le Bourget International Airport→KDAY — James M. Cox Dayton International AirportSep 5, 2026, 12:15 PM · 8h 3m
- CompletedEGSS — London Stansted Airport→LFPB — Paris-Le Bourget International AirportSep 2, 2026, 10:04 AM · 50m
- CompletedKDAY — James M. Cox Dayton International Airport→EGSS — London Stansted AirportAug 30, 2026, 12:54 AM · 6h 59m
- CompletedKSRQ — Sarasota Bradenton International Airport→KDAY — James M. Cox Dayton International AirportAug 14, 2026, 11:12 PM · 1h 58m
- CompletedKDAY — James M. Cox Dayton International Airport→KSRQ — Sarasota Bradenton International AirportAug 11, 2026, 08:25 PM · 2h 3m
- CompletedLSYQ — Croix de Coeur Altiport→1WF — Waco FieldJul 19, 2026, 11:38 AM · 8h 27m
Gulfstream G550 specs
N503GS is a Gulfstream G550. This model can fly about 6,750 nautical miles without stopping and seats up to 19 passengers.
- Maker
- Gulfstream
- Range
- 6,750 nm
- Top speed
- Mach 0.885 / 488 kts
- Seats
- Up to 19
- Ceiling
- 51,000 ft
- Length
- 96.5 ft
- Engines
- 2× Rolls-Royce BR710-C4-11 (15,385 lbf each)
- In service since
- 2003
Who else flies a Gulfstream G550?
We track 36 other planes of this model. Here are 8 of them.
N503GS owner and tail number FAQ
Who owns N503GS?
N503GS is a Gulfstream G550 owned by Alternate Solutions Health Network.
What type of aircraft is N503GS?
N503GS is a Gulfstream G550. It is a heavy jet that burns about 410 gallons of fuel per hour.
What is N503GS's ICAO hex code?
N503GS's ICAO hex code is A645BC. It is the unique code the jet's transponder sends out over ADS-B. Celebplanes uses it to find N503GS in the live feed.
Where is N503GS now?
N503GS is airborne right now. It departed KDAY — James M. Cox Dayton International Airport on Oct 22, 2026, 07:40 PM, and its live position is plotted on the Celebplanes map.
How much CO₂ does N503GS emit per flight hour?
N503GS gives off about 3,939 kg of CO₂ for each hour it flies. That is about the same as driving an average car 9,749 miles.
Owner matches come from the FAA registry, adsb.lol (ODbL) and ADSB.fi data, and SEC filings. They may be incomplete or out of date. Methodology · Report an error. For observational use only.