Apparatus

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sensors Mode-S transponder

A57E98

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N453PT · CESSNA 172 Skyhawk · operated by HENRIE AVIATION LLC

Hex
A57E98
Octal
51277230
Decimal
10,845,848
Country
US
Tail
N453PT
Type
C172
No current signal · last broadcast 1h ago
Flights observed
145
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A57E98.

Country allocation

The ICAO 24-bit address A57E98 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
N453PT - 145 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 N453PT CDW → CDW Jun 2, 22:45 UTCJun 2, 23:45 UTC1h 0m
2026-06-02 N453PT - Jun 2, 20:50 UTCJun 2, 21:50 UTC1h 0m
2026-06-02 N453PT - Jun 2, 18:45 UTCJun 2, 19:40 UTC55m
2026-06-02 N453PT - Jun 2, 16:55 UTCJun 2, 17:50 UTC55m
2026-06-02 N453PT - Jun 2, 13:45 UTCJun 2, 14:55 UTC1h 10m
2026-06-01 N453PT - Jun 1, 18:40 UTCJun 1, 19:45 UTC1h 5m
2026-06-01 N453PT - Jun 1, 17:00 UTCJun 1, 17:45 UTC45m
2026-06-01 N453PT - Jun 1, 14:35 UTCJun 1, 15:45 UTC1h 10m
2026-06-01 N453PT - Jun 1, 00:45 UTCJun 1, 02:20 UTC1h 35m
2026-05-31 N453PT CDW → CDW May 31, 20:40 UTCMay 31, 21:25 UTC45m
2026-05-31 N453PT - May 31, 17:00 UTCMay 31, 17:50 UTC50m
2026-05-31 N453PT - May 31, 14:50 UTCMay 31, 15:45 UTC55m
2026-05-29 N453PT - May 29, 16:55 UTCMay 29, 17:55 UTC1h 0m
2026-05-29 N453PT - May 29, 14:50 UTCMay 29, 15:55 UTC1h 5m
2026-05-29 N453PT - May 29, 11:55 UTCMay 29, 12:45 UTC50m
2026-05-28 N453PT - May 28, 15:40 UTCMay 28, 16:35 UTC55m
2026-05-28 N453PT CDW → CDW May 28, 12:45 UTCMay 28, 13:40 UTC55m
2026-05-27 N453PT - May 27, 20:00 UTCMay 27, 20:50 UTC50m
2026-05-27 N453PT - May 27, 17:40 UTCMay 27, 18:50 UTC1h 10m
2026-05-27 N453PT CDW → CDW May 27, 13:40 UTCMay 27, 14:45 UTC1h 5m
2026-05-26 N453PT - May 26, 21:40 UTCMay 26, 23:19 UTC1h 40m
2026-05-26 N453PT - May 26, 18:34 UTCMay 26, 19:40 UTC1h 5m
2026-05-26 N453PT - May 26, 16:00 UTCMay 26, 17:30 UTC1h 30m
2026-05-26 N453PT - May 26, 14:05 UTCMay 26, 14:50 UTC45m
2026-05-26 N453PT - May 26, 12:50 UTCMay 26, 13:19 UTC30m
2026-05-19 N453PT - May 19, 12:50 UTCMay 19, 14:25 UTC1h 35m
2026-05-18 N453PT - May 18, 20:45 UTCMay 18, 21:40 UTC55m
2026-05-18 N453PT - May 18, 18:45 UTCMay 18, 19:30 UTC45m
2026-05-18 N453PT - May 18, 16:35 UTCMay 18, 17:45 UTC1h 10m
2026-05-18 N453PT - May 18, 14:50 UTCMay 18, 15:55 UTC1h 5m
2026-05-18 N453PT - May 18, 11:35 UTCMay 18, 12:45 UTC1h 10m
2026-05-17 N453PT - May 17, 21:40 UTCMay 17, 22:35 UTC55m
2026-05-17 N453PT - May 17, 19:35 UTCMay 17, 20:45 UTC1h 10m
2026-05-17 N453PT - May 17, 17:40 UTCMay 17, 18:35 UTC55m
2026-05-17 N453PT - May 17, 16:01 UTCMay 17, 16:55 UTC55m
2026-05-17 N453PT - May 17, 13:35 UTCMay 17, 14:40 UTC1h 5m
2026-05-17 N453PT - May 17, 11:40 UTCMay 17, 12:45 UTC1h 5m
2026-05-16 N453PT - May 16, 18:50 UTCMay 16, 19:50 UTC1h 0m
2026-05-16 N453PT - May 16, 17:01 UTCMay 16, 17:55 UTC55m
2026-05-16 N453PT - May 16, 15:01 UTCMay 16, 16:00 UTC1h 0m
2026-05-16 N453PT CDW → CDW May 16, 13:05 UTCMay 16, 13:46 UTC40m
2026-05-15 N453PT - May 15, 19:35 UTCMay 15, 20:40 UTC1h 5m
2026-05-15 N453PT CDW → CDW May 15, 14:50 UTCMay 15, 15:50 UTC1h 0m
2026-05-15 N453PT CDW → CDW May 15, 12:40 UTCMay 15, 14:00 UTC1h 20m
2026-05-14 N453PT - May 14, 13:01 UTCMay 14, 13:50 UTC50m
2026-05-13 N453PT - May 13, 18:35 UTCMay 13, 19:45 UTC1h 10m
2026-05-13 N453PT - May 13, 16:35 UTCMay 13, 17:45 UTC1h 10m
2026-05-13 N453PT - May 13, 13:55 UTCMay 13, 14:45 UTC50m
2026-05-13 N453PT - May 13, 11:40 UTCMay 13, 12:40 UTC1h 0m
2026-05-13 N453PT - May 13, 01:15 UTCMay 13, 02:40 UTC1h 25m

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 N453PT page for operator, model, and routing details .

Mode-S A57E98 frequently asked

What is Mode-S code A57E98?
A57E98 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N453PT.
Where is Mode-S A57E98 registered?
Mode-S code A57E98 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 A57E98 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57E98, octal 51277230, decimal 10,845,848.
What flights does A57E98 operate?
Mode-S A57E98 has broadcast 1 distinct callsign, including N453PT.