Apparatus

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sensors Mode-S transponder

A4C207

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4053T · ROBINSON R-44 Raven · operated by SKY HIGH HELICOPTERS LLC

Hex
A4C207
Octal
51141007
Decimal
10,797,575
Country
US
Tail
N4053T
Type
R44
No current signal · last broadcast 16d ago
Flights observed
175
Distinct callsigns
1
Country
US
Last broadcast
16d ago

Last known position

Most recent position reported by Mode-S A4C207.

Country allocation

The ICAO 24-bit address A4C207 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
N4053T - 175 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N4053T - Jul 26, 20:15 UTCJul 26, 21:15 UTC1h 0m
2026-07-25 N4053T - Jul 25, 22:40 UTCJul 25, 22:55 UTC15m
2026-07-25 N4053T - Jul 25, 18:55 UTCJul 25, 19:45 UTC50m
2026-07-25 N4053T - Jul 25, 16:50 UTCJul 25, 17:50 UTC1h 0m
2026-07-23 N4053T - Jul 23, 22:55 UTCJul 23, 23:35 UTC40m
2026-07-23 N4053T - Jul 23, 20:10 UTCJul 23, 20:50 UTC40m
2026-07-23 N4053T - Jul 23, 17:45 UTCJul 23, 18:00 UTC15m
2026-07-22 N4053T - Jul 22, 22:05 UTCJul 22, 22:30 UTC25m
2026-07-21 N4053T - Jul 21, 17:20 UTCJul 21, 17:45 UTC25m
2026-07-20 N4053T - Jul 20, 22:35 UTCJul 20, 23:15 UTC40m
2026-07-20 N4053T - Jul 20, 18:20 UTCJul 20, 19:35 UTC1h 15m
2026-07-18 N4053T - Jul 18, 20:25 UTCJul 18, 21:00 UTC35m
2026-07-18 N4053T - Jul 18, 18:50 UTCJul 18, 19:30 UTC40m
2026-07-17 N4053T - Jul 17, 19:49 UTCJul 17, 20:00 UTC10m
2026-07-17 N4053T - Jul 17, 17:30 UTCJul 17, 17:44 UTC15m
2026-07-16 N4053T - Jul 16, 22:40 UTCJul 16, 23:49 UTC1h 10m
2026-07-16 N4053T - Jul 16, 18:50 UTCJul 16, 19:30 UTC40m
2026-07-16 N4053T - Jul 16, 17:05 UTCJul 16, 17:45 UTC40m
2026-07-14 N4053T - Jul 14, 20:45 UTCJul 14, 22:20 UTC1h 35m
2026-07-13 N4053T - Jul 13, 21:20 UTCJul 13, 21:50 UTC30m
2026-07-13 N4053T - Jul 13, 01:15 UTCJul 13, 01:25 UTC10m
2026-07-12 N4053T - Jul 12, 23:00 UTCJul 13, 00:01 UTC1h 0m
2026-07-10 N4053T - Jul 10, 22:50 UTCJul 11, 00:00 UTC1h 10m
2026-07-10 N4053T - Jul 10, 17:10 UTCJul 10, 17:55 UTC45m
2026-07-09 N4053T - Jul 9, 20:35 UTCJul 9, 21:05 UTC30m
2026-07-09 N4053T - Jul 9, 16:20 UTCJul 9, 17:15 UTC55m
2026-07-09 N4053T - Jul 9, 03:50 UTCJul 9, 04:40 UTC50m
2026-07-09 N4053T - Jul 9, 00:40 UTCJul 9, 02:00 UTC1h 20m
2026-07-07 N4053T - Jul 7, 20:05 UTCJul 7, 21:55 UTC1h 50m
2026-07-07 N4053T - Jul 7, 17:35 UTCJul 7, 19:25 UTC1h 50m
2026-07-06 N4053T - Jul 6, 21:10 UTCJul 6, 22:15 UTC1h 5m
2026-07-06 N4053T - Jul 6, 17:25 UTCJul 6, 18:00 UTC35m
2026-07-05 N4053T - Jul 5, 21:10 UTCJul 5, 22:25 UTC1h 15m
2026-07-05 N4053T - Jul 5, 19:05 UTCJul 5, 20:05 UTC1h 0m
2026-07-03 N4053T - Jul 3, 22:45 UTCJul 3, 23:40 UTC55m
2026-07-03 N4053T - Jul 3, 20:20 UTCJul 3, 21:50 UTC1h 30m
2026-07-02 N4053T - Jul 2, 21:50 UTCJul 2, 22:55 UTC1h 5m
2026-07-01 N4053T - Jul 1, 22:35 UTCJul 1, 23:25 UTC50m
2026-07-01 N4053T - Jul 1, 18:45 UTCJul 1, 19:25 UTC40m
2026-06-30 N4053T - Jun 30, 21:55 UTCJun 30, 22:25 UTC30m
2026-06-30 N4053T - Jun 30, 20:15 UTCJun 30, 21:20 UTC1h 5m
2026-06-29 N4053T - Jun 29, 20:30 UTCJun 29, 22:00 UTC1h 30m
2026-06-29 N4053T - Jun 29, 16:44 UTCJun 29, 17:49 UTC1h 5m
2026-06-28 N4053T - Jun 28, 19:34 UTCJun 28, 19:44 UTC10m
2026-06-28 N4053T - Jun 28, 01:40 UTCJun 28, 02:20 UTC40m
2026-06-28 N4053T - Jun 28, 00:20 UTCJun 28, 00:50 UTC30m
2026-06-27 N4053T - Jun 27, 22:45 UTCJun 27, 23:39 UTC55m
2026-06-27 N4053T - Jun 27, 01:09 UTCJun 27, 02:20 UTC1h 10m
2026-06-26 N4053T - Jun 26, 22:55 UTCJun 26, 23:49 UTC55m
2026-06-26 N4053T - Jun 26, 16:44 UTCJun 26, 17:29 UTC45m

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 N4053T page for operator, model, and routing details .

Mode-S A4C207 frequently asked

What is Mode-S code A4C207?
A4C207 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4053T.
Where is Mode-S A4C207 registered?
Mode-S code A4C207 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 A4C207 broadcasting right now?
No active broadcast right now. Last signal was 16d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C207, octal 51141007, decimal 10,797,575.
What flights does A4C207 operate?
Mode-S A4C207 has broadcast 1 distinct callsign, including N4053T.