Apparatus

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sensors Mode-S transponder

A57ED1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N453S · CESSNA 550 Citation S2 · operated by N18920 LLC

Hex
A57ED1
Octal
51277321
Decimal
10,845,905
Country
US
Tail
N453S
Type
C550
No current signal · last broadcast 9h ago
Flights observed
85
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A57ED1.

Country allocation

The ICAO 24-bit address A57ED1 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
PXG453 - 85 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 PXG453 BOS → BKL Jul 14, 06:20 UTCJul 14, 07:55 UTC1h 35m
2026-07-14 PXG453 - Jul 14, 03:45 UTCJul 14, 05:30 UTC1h 45m
2026-07-14 PXG453 - Jul 14, 02:50 UTCJul 14, 03:10 UTC20m
2026-07-13 PXG453 - Jul 13, 05:25 UTCJul 13, 05:50 UTC25m
2026-07-13 PXG453 - Jul 13, 00:20 UTCJul 13, 00:50 UTC30m
2026-07-09 PXG453 - Jul 9, 20:00 UTCJul 9, 21:45 UTC1h 45m
2026-07-09 PXG453 - Jul 9, 17:15 UTCJul 9, 19:00 UTC1h 45m
2026-07-09 PXG453 - Jul 9, 13:05 UTCJul 9, 13:30 UTC25m
2026-07-03 PXG453 - Jul 3, 02:40 UTCJul 3, 03:20 UTC40m
2026-07-03 PXG453 - Jul 3, 00:05 UTCJul 3, 00:30 UTC25m
2026-07-02 PXG453 - Jul 2, 19:50 UTCJul 2, 20:15 UTC25m
2026-07-01 PXG453 - Jul 1, 14:25 UTCJul 1, 14:50 UTC25m
2026-07-01 PXG453 - Jul 1, 13:20 UTCJul 1, 13:45 UTC25m
2026-06-29 PXG453 - Jun 29, 21:05 UTCJun 30, 00:00 UTC2h 55m
2026-06-29 PXG453 - Jun 29, 16:35 UTCJun 29, 18:34 UTC2h 0m
2026-06-29 PXG453 - Jun 29, 14:09 UTCJun 29, 15:39 UTC1h 30m
2026-06-28 PXG453 - Jun 28, 02:39 UTCJun 28, 04:05 UTC1h 25m
2026-06-27 PXG453 DAY → FRG Jun 27, 23:19 UTCJun 28, 00:59 UTC1h 40m
2026-06-27 PXG453 - Jun 27, 21:55 UTCJun 27, 22:29 UTC35m
2026-06-25 PXG453 - Jun 25, 06:50 UTCJun 25, 08:24 UTC1h 35m
2026-06-25 PXG453 - Jun 25, 05:20 UTCJun 25, 05:44 UTC25m
2026-06-24 PXG453 LNN → TEB Jun 24, 22:55 UTCJun 24, 23:59 UTC1h 5m
2026-06-24 PXG453 - Jun 24, 21:00 UTCJun 24, 21:40 UTC40m
2026-06-23 PXG453 - Jun 23, 19:04 UTCJun 23, 19:29 UTC25m
2026-06-23 PXG453 - Jun 23, 17:34 UTCJun 23, 18:04 UTC30m
2026-06-23 PXG453 - Jun 23, 13:55 UTCJun 23, 16:35 UTC2h 40m
2026-06-23 PXG453 - Jun 23, 05:54 UTCJun 23, 08:30 UTC2h 35m
2026-06-23 PXG453 - Jun 23, 04:35 UTCJun 23, 05:00 UTC25m
2026-06-20 PXG453 PSQ → BKL Jun 20, 07:29 UTCJun 20, 08:55 UTC1h 25m
2026-06-20 PXG453 - Jun 20, 04:04 UTCJun 20, 06:39 UTC2h 35m
2026-06-19 PXG453 - Jun 19, 22:30 UTCJun 20, 01:24 UTC2h 55m
2026-06-19 PXG453 - Jun 19, 18:54 UTCJun 19, 20:24 UTC1h 30m
2026-06-16 PXG453 - Jun 16, 19:50 UTCJun 16, 20:30 UTC40m
2026-06-16 PXG453 BKL → LUK Jun 16, 18:39 UTCJun 16, 19:30 UTC50m
2026-06-16 PXG453 - Jun 16, 14:45 UTCJun 16, 15:30 UTC45m
2026-06-16 PXG453 - Jun 16, 13:30 UTCJun 16, 14:20 UTC50m
2026-06-15 PXG453 - Jun 15, 17:30 UTCJun 15, 18:45 UTC1h 15m
2026-06-15 PXG453 - Jun 15, 11:49 UTCJun 15, 13:10 UTC1h 20m
2026-06-14 PXG453 LUK → BKL Jun 14, 17:25 UTCJun 14, 18:15 UTC50m
2026-06-14 PXG453 - Jun 14, 13:50 UTCJun 14, 16:15 UTC2h 25m
2026-06-11 PXG453 - Jun 11, 16:25 UTCJun 11, 18:30 UTC2h 5m
2026-06-11 PXG453 - Jun 11, 14:05 UTCJun 11, 14:50 UTC45m
2026-06-11 PXG453 - Jun 11, 12:35 UTCJun 11, 13:30 UTC55m
2026-06-10 PXG453 - Jun 10, 02:00 UTCJun 10, 03:25 UTC1h 25m
2026-06-09 PXG453 - Jun 9, 23:45 UTCJun 10, 00:50 UTC1h 5m
2026-06-09 PXG453 - Jun 9, 17:40 UTCJun 9, 18:10 UTC30m
2026-06-08 PXG453 - Jun 8, 19:45 UTCJun 8, 21:15 UTC1h 30m
2026-06-08 PXG453 - Jun 8, 17:40 UTCJun 8, 18:20 UTC40m
2026-06-05 PXG453 - Jun 5, 23:25 UTCJun 5, 23:45 UTC20m
2026-06-05 PXG453 - Jun 5, 17:40 UTCJun 5, 18:05 UTC25m

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 N453S page for operator, model, and routing details .

Mode-S A57ED1 frequently asked

What is Mode-S code A57ED1?
A57ED1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N453S.
Where is Mode-S A57ED1 registered?
Mode-S code A57ED1 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 A57ED1 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A57ED1, octal 51277321, decimal 10,845,905.
What flights does A57ED1 operate?
Mode-S A57ED1 has broadcast 1 distinct callsign, including PXG453.