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sensors Mode-S transponder

A7197A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N557AP · BEECHCRAFT Super King Air 350 · operated by ATLANTIC TRANSPORTATION OF WILMINGTON LLC

Hex
A7197A
Octal
51614572
Decimal
10,951,034
Country
US
Tail
N557AP
Type
B350
No current signal · last broadcast 11d ago
Flights observed
113
Distinct callsigns
1
Country
US
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S A7197A.

Country allocation

The ICAO 24-bit address A7197A 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
N557AP - 113 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N557AP - Jul 24, 22:10 UTCJul 24, 22:35 UTC25m
2026-07-24 N557AP - Jul 24, 19:45 UTCJul 24, 21:35 UTC1h 50m
2026-07-24 N557AP - Jul 24, 17:20 UTCJul 24, 19:00 UTC1h 40m
2026-07-24 N557AP - Jul 24, 14:05 UTCJul 24, 14:35 UTC30m
2026-07-16 N557AP - Jul 16, 18:29 UTCJul 16, 20:49 UTC2h 20m
2026-07-16 N557AP - Jul 16, 12:25 UTCJul 16, 13:00 UTC35m
2026-07-16 N557AP - Jul 16, 11:25 UTCJul 16, 11:50 UTC25m
2026-07-05 N557AP - Jul 5, 20:10 UTCJul 5, 21:10 UTC1h 0m
2026-07-05 N557AP - Jul 5, 18:55 UTCJul 5, 19:10 UTC15m
2026-07-03 N557AP - Jul 3, 22:35 UTCJul 3, 23:45 UTC1h 10m
2026-07-03 N557AP - Jul 3, 20:10 UTCJul 3, 21:05 UTC55m
2026-07-02 N557AP - Jul 2, 23:30 UTCJul 3, 00:45 UTC1h 15m
2026-07-02 N557AP - Jul 2, 21:35 UTCJul 2, 22:00 UTC25m
2026-07-02 N557AP - Jul 2, 19:45 UTCJul 2, 20:15 UTC30m
2026-07-01 N557AP - Jul 1, 21:10 UTCJul 1, 22:10 UTC1h 0m
2026-07-01 N557AP - Jul 1, 20:15 UTCJul 1, 20:40 UTC25m
2026-07-01 N557AP - Jul 1, 15:50 UTCJul 1, 16:55 UTC1h 5m
2026-06-30 N557AP - Jun 30, 20:35 UTCJun 30, 22:45 UTC2h 10m
2026-06-30 N557AP - Jun 30, 12:40 UTCJun 30, 13:15 UTC35m
2026-06-30 N557AP - Jun 30, 11:10 UTCJun 30, 12:00 UTC50m
2026-06-28 N557AP - Jun 28, 13:19 UTCJun 28, 13:29 UTC10m
2026-06-26 N557AP - Jun 26, 15:49 UTCJun 26, 16:35 UTC45m
2026-06-26 N557AP - Jun 26, 11:34 UTCJun 26, 12:19 UTC45m
2026-06-23 N557AP - Jun 23, 17:54 UTCJun 23, 20:29 UTC2h 35m
2026-06-23 N557AP - Jun 23, 11:14 UTCJun 23, 12:49 UTC1h 35m
2026-06-22 N557AP - Jun 22, 21:40 UTCJun 22, 22:10 UTC30m
2026-06-22 N557AP - Jun 22, 14:14 UTCJun 22, 16:24 UTC2h 10m
2026-06-22 N557AP CHS → TEB Jun 22, 10:44 UTCJun 22, 12:40 UTC1h 55m
2026-06-18 N557AP - Jun 18, 21:10 UTCJun 18, 23:25 UTC2h 15m
2026-06-18 N557AP CHS → TEB Jun 18, 17:40 UTCJun 18, 19:45 UTC2h 5m
2026-06-17 N557AP - Jun 17, 17:50 UTCJun 17, 18:45 UTC55m
2026-06-17 N557AP - Jun 17, 12:00 UTCJun 17, 12:50 UTC50m
2026-06-16 N557AP - Jun 16, 18:25 UTCJun 16, 19:25 UTC1h 0m
2026-06-16 N557AP - Jun 16, 11:55 UTCJun 16, 12:14 UTC20m
2026-06-15 N557AP - Jun 15, 18:50 UTCJun 15, 20:00 UTC1h 10m
2026-06-15 N557AP - Jun 15, 11:49 UTCJun 15, 12:35 UTC45m
2026-06-15 N557AP - Jun 15, 11:00 UTCJun 15, 11:10 UTC10m
2026-06-14 N557AP - Jun 14, 00:00 UTCJun 14, 00:50 UTC50m
2026-06-13 N557AP - Jun 13, 20:40 UTCJun 13, 21:45 UTC1h 5m
2026-06-10 N557AP - Jun 10, 22:15 UTCJun 10, 23:25 UTC1h 10m
2026-06-10 N557AP - Jun 10, 20:15 UTCJun 10, 21:15 UTC1h 0m
2026-06-09 N557AP - Jun 9, 22:00 UTCJun 9, 22:55 UTC55m
2026-06-09 N557AP - Jun 9, 20:55 UTCJun 9, 21:20 UTC25m
2026-06-09 N557AP - Jun 9, 19:05 UTCJun 9, 19:25 UTC20m
2026-06-07 N557AP - Jun 7, 21:10 UTCJun 7, 22:05 UTC55m
2026-06-07 N557AP - Jun 7, 19:35 UTCJun 7, 20:20 UTC45m
2026-06-07 N557AP - Jun 7, 16:05 UTCJun 7, 16:50 UTC45m
2026-06-07 N557AP - Jun 7, 12:10 UTCJun 7, 12:55 UTC45m
2026-06-04 N557AP - Jun 4, 21:30 UTCJun 4, 22:40 UTC1h 10m
2026-06-04 N557AP - Jun 4, 18:40 UTCJun 4, 19:30 UTC50m

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 N557AP page for operator, model, and routing details .

Mode-S A7197A frequently asked

What is Mode-S code A7197A?
A7197A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N557AP.
Where is Mode-S A7197A registered?
Mode-S code A7197A 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 A7197A broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7197A, octal 51614572, decimal 10,951,034.
What flights does A7197A operate?
Mode-S A7197A has broadcast 1 distinct callsign, including N557AP.