Apparatus

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sensors Mode-S transponder

A84C57

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6338F · CESSNA 172 Skyhawk · operated by RARITAN VALLEY FLYING SCHOOL

Hex
A84C57
Octal
52046127
Decimal
11,029,591
Country
US
Tail
N6338F
Type
C172
Broadcasting now · callsign N6338F · 800 ft
Flights observed
21
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Current position

A84C57 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A84C57 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
N6338F - 21 2026-04-18

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-04-18 N6338F - Apr 18, 15:35 UTCApr 18, 15:45 UTC10m
2026-04-17 N6338F - Apr 17, 15:25 UTCApr 17, 15:45 UTC20m
2026-04-17 N6338F - Apr 17, 14:35 UTCApr 17, 15:15 UTC39m
2026-04-17 N6338F - Apr 17, 12:50 UTCApr 17, 13:05 UTC15m
2026-04-17 N6338F - Apr 17, 12:00 UTCApr 17, 12:15 UTC15m
2026-04-16 N6338F PCT → PCT Apr 16, 15:15 UTCApr 16, 15:45 UTC30m
2026-04-16 N6338F PCT → PCT Apr 16, 14:40 UTCApr 16, 15:10 UTC30m
2026-04-16 N6338F - Apr 16, 13:15 UTCApr 16, 13:50 UTC35m
2026-04-16 N6338F - Apr 16, 12:45 UTCApr 16, 13:05 UTC20m
2026-04-15 N6338F - Apr 15, 20:05 UTCApr 15, 20:55 UTC50m
2026-04-15 N6338F - Apr 15, 18:00 UTCApr 15, 18:50 UTC50m
2026-04-15 N6338F PCT → PCT Apr 15, 13:40 UTCApr 15, 14:30 UTC50m
2026-04-14 N6338F PCT → PCT Apr 14, 23:15 UTCApr 14, 23:45 UTC30m
2026-04-14 N6338F PCT → PCT Apr 14, 21:05 UTCApr 14, 22:30 UTC1h 25m
2026-04-14 N6338F - Apr 14, 18:55 UTCApr 14, 19:45 UTC50m
2026-04-14 N6338F - Apr 14, 16:50 UTCApr 14, 17:55 UTC1h 5m
2026-04-14 N6338F PCT → PCT Apr 14, 14:50 UTCApr 14, 15:25 UTC35m
2026-04-14 N6338F PCT → PCT Apr 14, 13:10 UTCApr 14, 14:05 UTC55m
2026-04-14 N6338F PCT → PCT Apr 14, 11:45 UTCApr 14, 12:40 UTC55m
2026-04-13 N6338F PCT → PCT Apr 13, 12:50 UTCApr 13, 13:05 UTC15m
2026-04-12 N6338F - Apr 12, 19:25 UTCApr 12, 20:00 UTC35m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N6338F page for operator, model, and routing details .

Mode-S A84C57 frequently asked

What is Mode-S code A84C57?
A84C57 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6338F.
Where is Mode-S A84C57 registered?
Mode-S code A84C57 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A84C57 broadcasting right now?
Yes. Mode-S A84C57 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A84C57, octal 52046127, decimal 11,029,591.
What flights does A84C57 operate?
Mode-S A84C57 has broadcast 1 distinct callsign, including N6338F.