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sensors Mode-S transponder

A804A7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6157J · PIPER PA-28-140/150/160/180 · operated by BAGPIPER AVIATION LLC

Hex
A804A7
Octal
52002247
Decimal
11,011,239
Country
US
Tail
N6157J
Type
P28A
No current signal · last broadcast 20d ago
Flights observed
94
Distinct callsigns
1
Country
US
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S A804A7.

Country allocation

The ICAO 24-bit address A804A7 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
N6157J - 94 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N6157J - Jul 25, 03:40 UTCJul 25, 04:20 UTC40m
2026-07-24 N6157J - Jul 24, 22:50 UTCJul 24, 23:15 UTC25m
2026-07-24 N6157J - Jul 24, 17:40 UTCJul 24, 18:00 UTC20m
2026-07-24 N6157J - Jul 24, 16:20 UTCJul 24, 16:55 UTC35m
2026-07-24 N6157J - Jul 24, 15:00 UTCJul 24, 15:50 UTC50m
2026-07-23 N6157J - Jul 23, 21:10 UTCJul 23, 21:55 UTC45m
2026-07-20 N6157J - Jul 20, 23:40 UTCJul 21, 00:35 UTC55m
2026-07-20 N6157J - Jul 20, 21:00 UTCJul 20, 21:35 UTC35m
2026-07-20 N6157J - Jul 20, 19:00 UTCJul 20, 19:45 UTC45m
2026-07-20 N6157J - Jul 20, 14:05 UTCJul 20, 14:55 UTC50m
2026-07-20 N6157J - Jul 20, 00:35 UTCJul 20, 01:10 UTC35m
2026-07-19 N6157J - Jul 19, 22:50 UTCJul 19, 23:15 UTC25m
2026-07-19 N6157J OSU → OSU Jul 19, 15:55 UTCJul 19, 16:35 UTC40m
2026-07-16 N6157J - Jul 16, 21:05 UTCJul 16, 21:45 UTC40m
2026-07-15 N6157J - Jul 15, 14:35 UTCJul 15, 15:10 UTC35m
2026-07-13 N6157J - Jul 13, 15:15 UTCJul 13, 16:05 UTC50m
2026-07-11 N6157J - Jul 11, 22:20 UTCJul 11, 22:45 UTC25m
2026-07-11 N6157J - Jul 11, 21:25 UTCJul 11, 21:45 UTC20m
2026-07-11 N6157J - Jul 11, 16:00 UTCJul 11, 17:00 UTC1h 0m
2026-07-11 N6157J - Jul 11, 12:30 UTCJul 11, 12:40 UTC10m
2026-07-07 N6157J - Jul 7, 23:55 UTCJul 8, 00:05 UTC10m
2026-07-07 N6157J - Jul 7, 22:25 UTCJul 7, 23:00 UTC35m
2026-07-06 N6157J - Jul 6, 02:10 UTCJul 6, 02:40 UTC30m
2026-07-05 N6157J - Jul 5, 22:25 UTCJul 6, 01:35 UTC3h 10m
2026-07-05 N6157J - Jul 5, 18:10 UTCJul 5, 21:25 UTC3h 15m
2026-07-01 N6157J - Jul 1, 19:35 UTCJul 1, 22:20 UTC2h 45m
2026-07-01 N6157J - Jul 1, 16:00 UTCJul 1, 17:45 UTC1h 45m
2026-07-01 N6157J - Jul 1, 13:40 UTCJul 1, 15:25 UTC1h 45m
2026-07-01 N6157J - Jul 1, 12:30 UTCJul 1, 13:30 UTC1h 0m
2026-07-01 N6157J - Jul 1, 00:10 UTCJul 1, 00:20 UTC10m
2026-06-30 N6157J - Jun 30, 21:30 UTCJun 30, 22:15 UTC45m
2026-06-28 N6157J - Jun 28, 23:20 UTCJun 29, 00:14 UTC55m
2026-06-26 N6157J - Jun 26, 14:50 UTCJun 26, 16:09 UTC1h 20m
2026-06-26 N6157J - Jun 26, 01:15 UTCJun 26, 02:50 UTC1h 35m
2026-06-24 N6157J - Jun 24, 02:20 UTCJun 24, 03:15 UTC55m
2026-06-24 N6157J - Jun 24, 02:05 UTCJun 24, 02:09 UTC5m
2026-06-24 N6157J - Jun 24, 00:55 UTCJun 24, 02:00 UTC1h 5m
2026-06-19 N6157J - Jun 19, 17:04 UTCJun 19, 18:20 UTC1h 15m
2026-06-19 N6157J - Jun 19, 12:14 UTCJun 19, 13:44 UTC1h 30m
2026-06-17 N6157J - Jun 17, 15:10 UTCJun 17, 15:50 UTC40m
2026-06-16 N6157J - Jun 16, 15:30 UTCJun 16, 18:05 UTC2h 35m
2026-06-16 N6157J - Jun 16, 00:15 UTCJun 16, 01:19 UTC1h 5m
2026-06-15 N6157J - Jun 15, 21:35 UTCJun 15, 22:05 UTC30m
2026-06-15 N6157J - Jun 15, 16:49 UTCJun 15, 17:20 UTC30m
2026-06-15 N6157J - Jun 15, 14:10 UTCJun 15, 15:10 UTC1h 0m
2026-06-13 N6157J - Jun 13, 00:20 UTCJun 13, 01:15 UTC55m
2026-06-12 N6157J - Jun 12, 21:50 UTCJun 12, 22:15 UTC25m
2026-06-12 N6157J - Jun 12, 19:15 UTCJun 12, 19:35 UTC20m
2026-06-11 N6157J - Jun 11, 21:00 UTCJun 11, 21:55 UTC55m
2026-06-11 N6157J - Jun 11, 19:05 UTCJun 11, 19:45 UTC40m

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 N6157J page for operator, model, and routing details .

Mode-S A804A7 frequently asked

What is Mode-S code A804A7?
A804A7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6157J.
Where is Mode-S A804A7 registered?
Mode-S code A804A7 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 A804A7 broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A804A7, octal 52002247, decimal 11,011,239.
What flights does A804A7 operate?
Mode-S A804A7 has broadcast 1 distinct callsign, including N6157J.