N99603
Built 2013 · registered US
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Performance specs
- Range
- 350 nm
- Cruise speed
- 113 kt
- Max speed
- —
- Service ceiling
- 14,000 ft
- Takeoff distance
- —
- Landing distance
- —
- MTOW
- 1,100 kg
- Empty weight
- —
- Fuel capacity
- 116 L
- Length
- 11.7 m
- Wingspan
- —
- Height
- 3.2 m
- Seats
- 4
- Max passengers
- 4
Flight activity
(30 tracking legs recorded)- Last 30 days
- 8
- Last 90 days
- 22
- Last seen
- 21 Oct 2026
- Tracked since
- 4 Jun 2026
Frequent routes: PAMR → PAMR (2) · PAKN → PAKN (1) · PAKN → PAMR (1)
- Tracked flight10 Oct 2026 · 4h 27m
- Tracked flight10 Oct 2026 · 1h 08m
- Tracked flight8 Oct 2026 · 1h 59m
- Tracked flight7 Oct 2026 · 5h 35m
- Tracked flight7 Oct 2026 · 2h 31m
- Tracked flight4 Oct 2026 · 4h 48m
- Tracked flight4 Oct 2026 · 2h 32m
- Tracked flight3 Oct 2026 · 4h 24m
- Tracked flight3 Oct 2026 · 1h 56m
- Tracked flight2 Oct 2026 · 4h 21m
Showing the 10 most recent distinct flights. The total counts every raw ADS-B tracking leg, including repeat observations and sub-5-minute artifacts.
From ADS-B observations collected since May 2026. Coverage depends on ground-receiver density; gaps do not mean the aircraft did not fly.
Common. One of the most common aircraft types we track.
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Registration history
(1)- N99603USACTIVEALPINE AIR ALASKA LLC2018 – present
Owner names are published by the issuing civil registry (FAA / CCARCS / CASA / ANAC / NZ CAA). Owner addresses present in the source are not republished here. Registered owner? Request removal
What aircraft model is N99603?
N99603 is a Robinson R44, built in 2013. Sprinkle's record for N99603 covers its lineage, ownership history and specifications.
Is N99603 currently active?
Registry records list N99603's status as Active, registered in United States — a Robinson R44.
What is the manufacturer serial number (MSN) of N99603?
N99603 carries manufacturer serial number (MSN) 13465, the serial assigned to this Robinson R44 airframe when it was built.
What is the ICAO24 / Mode S code for N99603?
N99603's ICAO24 (Mode S) transponder code is ADEB61 — the hex address the Mode S transponder on this Robinson R44 broadcasts.