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sensors Mode-S transponder

A51D83

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N429ES · CESSNA 172R Cutlass RG · operated by BARBERS POINT FLIGHT SCHOOL LLC

Hex
A51D83
Octal
51216603
Decimal
10,820,995
Country
US
Tail
N429ES
Type
C72R
No current signal · last broadcast Jul 26, 04:55 UTC
Flights observed
349
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 04:55 UTC

Last known position

Most recent position reported by Mode-S A51D83.

Country allocation

The ICAO 24-bit address A51D83 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
N429ES - 349 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N429ES - Jul 26, 03:35 UTCJul 26, 04:55 UTC1h 20m
2026-07-26 N429ES - Jul 26, 00:50 UTCJul 26, 01:15 UTC25m
2026-07-25 N429ES JRF → JRF Jul 25, 18:45 UTCJul 25, 19:45 UTC1h 0m
2026-07-25 N429ES - Jul 25, 03:15 UTCJul 25, 03:25 UTC10m
2026-07-25 N429ES JRF → JRF Jul 25, 00:00 UTCJul 25, 01:10 UTC1h 10m
2026-07-24 N429ES JRF → JRF Jul 24, 22:30 UTCJul 24, 23:15 UTC45m
2026-07-24 N429ES - Jul 24, 16:50 UTCJul 24, 19:00 UTC2h 10m
2026-07-24 N429ES JRF → JRF Jul 24, 03:30 UTCJul 24, 03:45 UTC15m
2026-07-23 N429ES - Jul 23, 22:25 UTCJul 23, 22:55 UTC30m
2026-07-23 N429ES - Jul 23, 18:50 UTCJul 23, 19:45 UTC55m
2026-07-23 N429ES JRF → JRF Jul 23, 05:40 UTCJul 23, 06:30 UTC50m
2026-07-23 N429ES - Jul 23, 03:35 UTCJul 23, 04:40 UTC1h 5m
2026-07-23 N429ES - Jul 23, 01:25 UTCJul 23, 02:30 UTC1h 5m
2026-07-22 N429ES - Jul 22, 23:25 UTCJul 23, 00:15 UTC50m
2026-07-22 N429ES - Jul 22, 21:05 UTCJul 22, 22:15 UTC1h 10m
2026-07-22 N429ES - Jul 22, 19:05 UTCJul 22, 20:25 UTC1h 20m
2026-07-22 N429ES - Jul 22, 17:20 UTCJul 22, 18:15 UTC55m
2026-07-22 N429ES - Jul 22, 00:15 UTCJul 22, 01:10 UTC55m
2026-07-21 N429ES - Jul 21, 18:50 UTCJul 21, 19:50 UTC1h 0m
2026-07-21 N429ES JRF → JRF Jul 21, 16:50 UTCJul 21, 17:55 UTC1h 5m
2026-07-21 N429ES - Jul 21, 02:30 UTCJul 21, 02:45 UTC15m
2026-07-19 N429ES JRF → JRF Jul 19, 01:35 UTCJul 19, 02:40 UTC1h 5m
2026-07-18 N429ES JRF → JRF Jul 18, 23:15 UTCJul 18, 23:40 UTC25m
2026-07-18 N429ES - Jul 18, 21:25 UTCJul 18, 21:35 UTC10m
2026-07-18 N429ES - Jul 18, 18:35 UTCJul 18, 19:45 UTC1h 10m
2026-07-18 N429ES JRF → JRF Jul 18, 02:25 UTCJul 18, 03:25 UTC1h 1m
2026-07-17 N429ES - Jul 17, 22:45 UTCJul 17, 22:55 UTC10m
2026-07-17 N429ES - Jul 17, 20:35 UTCJul 17, 21:05 UTC30m
2026-07-17 N429ES - Jul 17, 19:05 UTCJul 17, 19:55 UTC50m
2026-07-17 N429ES JRF → JRF Jul 17, 05:10 UTCJul 17, 05:35 UTC25m
2026-07-16 N429ES JRF → JRF Jul 16, 23:40 UTCJul 17, 00:35 UTC55m
2026-07-16 N429ES - Jul 16, 20:39 UTCJul 16, 21:55 UTC1h 15m
2026-07-16 N429ES JRF → JRF Jul 16, 17:54 UTCJul 16, 18:50 UTC55m
2026-07-16 N429ES - Jul 16, 04:25 UTCJul 16, 05:15 UTC50m
2026-07-07 N429ES - Jul 7, 16:45 UTCJul 7, 17:45 UTC1h 0m
2026-07-07 N429ES JRF → JRF Jul 7, 01:45 UTCJul 7, 02:50 UTC1h 5m
2026-07-07 N429ES - Jul 7, 00:15 UTCJul 7, 00:45 UTC30m
2026-07-06 N429ES - Jul 6, 04:50 UTCJul 6, 05:30 UTC40m
2026-07-06 N429ES JRF → JRF Jul 6, 00:50 UTCJul 6, 01:55 UTC1h 5m
2026-07-04 N429ES - Jul 4, 18:45 UTCJul 4, 20:10 UTC1h 25m
2026-07-03 N429ES JRF → JRF Jul 3, 22:45 UTCJul 4, 00:05 UTC1h 20m
2026-07-03 N429ES - Jul 3, 18:45 UTCJul 3, 19:45 UTC1h 0m
2026-07-03 N429ES - Jul 3, 00:55 UTCJul 3, 02:25 UTC1h 30m
2026-07-02 N429ES JRF → JRF Jul 2, 22:45 UTCJul 2, 23:55 UTC1h 10m
2026-07-02 N429ES - Jul 2, 18:35 UTCJul 2, 19:20 UTC45m
2026-07-02 N429ES - Jul 2, 16:35 UTCJul 2, 17:45 UTC1h 10m
2026-07-02 N429ES JRF → JRF Jul 2, 02:35 UTCJul 2, 03:45 UTC1h 10m
2026-07-01 N429ES - Jul 1, 16:45 UTCJul 1, 17:35 UTC50m
2026-07-01 N429ES JRF → JRF Jul 1, 00:45 UTCJul 1, 01:45 UTC1h 0m
2026-06-30 N429ES JRF → JRF Jun 30, 22:25 UTCJun 30, 23:30 UTC1h 5m

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 N429ES page for operator, model, and routing details .

Mode-S A51D83 frequently asked

What is Mode-S code A51D83?
A51D83 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N429ES.
Where is Mode-S A51D83 registered?
Mode-S code A51D83 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 A51D83 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 04:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A51D83, octal 51216603, decimal 10,820,995.
What flights does A51D83 operate?
Mode-S A51D83 has broadcast 1 distinct callsign, including N429ES.