Apparatus

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sensors Mode-S transponder

A4C378

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N406FR · CESSNA 172R Cutlass RG · operated by LUNKEN FLIGHT TRAINING CENTER LLC

Hex
A4C378
Octal
51141570
Decimal
10,797,944
Country
US
Tail
N406FR
Type
C72R
Broadcasting now · callsign N406FR · 1,425 ft
Flights observed
280
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 22:00 UTC

Current position

A4C378 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4C378 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
N406FR - 280 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N406FR LUK → LUK Jul 25, 20:40 UTCJul 25, 22:00 UTC1h 20m
2026-07-25 N406FR LUK → LUK Jul 25, 15:45 UTCJul 25, 16:40 UTC55m
2026-07-25 N406FR LUK → LUK Jul 25, 13:25 UTCJul 25, 14:35 UTC1h 10m
2026-07-24 N406FR LUK → LUK Jul 24, 19:35 UTCJul 24, 20:35 UTC1h 0m
2026-07-24 N406FR LUK → LUK Jul 24, 17:40 UTCJul 24, 18:45 UTC1h 5m
2026-07-24 N406FR LUK → LUK Jul 24, 15:35 UTCJul 24, 16:30 UTC55m
2026-07-24 N406FR - Jul 24, 13:45 UTCJul 24, 14:35 UTC50m
2026-07-23 N406FR LUK → LUK Jul 23, 21:45 UTCJul 23, 23:00 UTC1h 15m
2026-07-23 N406FR LUK → LUK Jul 23, 19:50 UTCJul 23, 21:05 UTC1h 15m
2026-07-23 N406FR LUK → LUK Jul 23, 15:35 UTCJul 23, 16:40 UTC1h 5m
2026-07-22 N406FR - Jul 22, 21:45 UTCJul 22, 22:50 UTC1h 5m
2026-07-22 N406FR LUK → LUK Jul 22, 19:50 UTCJul 22, 20:35 UTC45m
2026-07-19 N406FR LUK → LUK Jul 19, 15:50 UTCJul 19, 16:40 UTC50m
2026-07-18 N406FR LUK → LUK Jul 18, 17:35 UTCJul 18, 18:30 UTC55m
2026-07-17 N406FR - Jul 17, 15:44 UTCJul 17, 16:19 UTC35m
2026-07-16 N406FR LUK → LUK Jul 16, 23:29 UTCJul 17, 00:50 UTC1h 20m
2026-07-16 N406FR LUK → LUK Jul 16, 19:55 UTCJul 16, 20:49 UTC55m
2026-07-16 N406FR LUK → LUK Jul 16, 17:40 UTCJul 16, 18:15 UTC35m
2026-07-16 N406FR LUK → LUK Jul 16, 16:05 UTCJul 16, 16:30 UTC25m
2026-07-15 N406FR LUK → LUK Jul 15, 23:35 UTCJul 16, 00:30 UTC55m
2026-07-15 N406FR LUK → LUK Jul 15, 21:40 UTCJul 15, 22:35 UTC55m
2026-07-15 N406FR - Jul 15, 19:55 UTCJul 15, 20:40 UTC45m
2026-07-15 N406FR - Jul 15, 17:40 UTCJul 15, 18:55 UTC1h 15m
2026-07-15 N406FR LUK → LUK Jul 15, 15:45 UTCJul 15, 16:20 UTC35m
2026-07-15 N406FR - Jul 15, 13:45 UTCJul 15, 14:45 UTC1h 0m
2026-07-14 N406FR LUK → LUK Jul 14, 23:45 UTCJul 15, 00:25 UTC40m
2026-07-14 N406FR LUK → LUK Jul 14, 21:45 UTCJul 14, 22:45 UTC59m
2026-07-14 N406FR LUK → LUK Jul 14, 18:10 UTCJul 14, 20:20 UTC2h 10m
2026-07-14 N406FR - Jul 14, 15:40 UTCJul 14, 16:35 UTC55m
2026-07-13 N406FR LUK → LUK Jul 13, 21:35 UTCJul 13, 22:45 UTC1h 10m
2026-07-13 N406FR - Jul 13, 20:30 UTCJul 13, 20:40 UTC10m
2026-07-13 N406FR - Jul 13, 11:55 UTCJul 13, 12:05 UTC10m
2026-07-12 N406FR LUK → LUK Jul 12, 16:01 UTCJul 12, 17:15 UTC1h 15m
2026-07-09 N406FR LUK → LUK Jul 9, 21:40 UTCJul 9, 22:50 UTC1h 10m
2026-07-09 N406FR LUK → LUK Jul 9, 17:55 UTCJul 9, 18:40 UTC45m
2026-07-09 N406FR - Jul 9, 15:40 UTCJul 9, 16:50 UTC1h 10m
2026-07-09 N406FR LUK → LUK Jul 9, 13:55 UTCJul 9, 14:40 UTC45m
2026-07-08 N406FR LUK → LUK Jul 8, 21:50 UTCJul 8, 22:45 UTC55m
2026-07-08 N406FR - Jul 8, 19:50 UTCJul 8, 20:35 UTC45m
2026-07-08 N406FR - Jul 8, 17:40 UTCJul 8, 18:55 UTC1h 15m
2026-07-08 N406FR LUK → LUK Jul 8, 13:30 UTCJul 8, 14:40 UTC1h 10m
2026-07-07 N406FR - Jul 7, 23:50 UTCJul 8, 00:20 UTC30m
2026-07-07 N406FR LUK → LUK Jul 7, 21:30 UTCJul 7, 22:15 UTC45m
2026-07-07 N406FR LUK → LUK Jul 7, 17:55 UTCJul 7, 18:50 UTC55m
2026-07-07 N406FR - Jul 7, 15:35 UTCJul 7, 16:40 UTC1h 5m
2026-07-06 N406FR LUK → LUK Jul 6, 21:45 UTCJul 6, 22:10 UTC25m
2026-07-06 N406FR LUK → LUK Jul 6, 18:15 UTCJul 6, 18:25 UTC10m
2026-07-06 N406FR LUK → LUK Jul 6, 17:40 UTCJul 6, 17:55 UTC15m
2026-07-06 N406FR LUK → LUK Jul 6, 15:40 UTCJul 6, 16:25 UTC45m
2026-07-06 N406FR LUK → LUK Jul 6, 13:55 UTCJul 6, 14:25 UTC30m

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 N406FR page for operator, model, and routing details .

Mode-S A4C378 frequently asked

What is Mode-S code A4C378?
A4C378 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N406FR.
Where is Mode-S A4C378 registered?
Mode-S code A4C378 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 A4C378 broadcasting right now?
Yes. Mode-S A4C378 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C378, octal 51141570, decimal 10,797,944.
What flights does A4C378 operate?
Mode-S A4C378 has broadcast 1 distinct callsign, including N406FR.