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sensors Mode-S transponder

A12185

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N172KJ · CESSNA 172 Skyhawk · operated by JA FLIGHT SERVICES LLC

Hex
A12185
Octal
50220605
Decimal
10,559,877
Country
US
Tail
N172KJ
Type
C172
No current signal · last broadcast 21h ago
Flights observed
108
Distinct callsigns
1
Country
US
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S A12185.

Country allocation

The ICAO 24-bit address A12185 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
N172KJ - 108 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 N172KJ - Jun 5, 21:40 UTCJun 5, 22:40 UTC1h 0m
2026-06-05 N172KJ - Jun 5, 15:20 UTCJun 5, 15:40 UTC20m
2026-06-04 N172KJ - Jun 4, 15:55 UTCJun 4, 16:05 UTC10m
2026-06-04 N172KJ - Jun 4, 13:35 UTCJun 4, 14:55 UTC1h 20m
2026-06-03 N172KJ AUZ → AUZ Jun 3, 20:50 UTCJun 3, 21:40 UTC50m
2026-06-03 N172KJ - Jun 3, 18:45 UTCJun 3, 19:10 UTC25m
2026-06-03 N172KJ - Jun 3, 16:50 UTCJun 3, 17:50 UTC1h 0m
2026-06-03 N172KJ AUZ → AUZ Jun 3, 15:05 UTCJun 3, 15:50 UTC45m
2026-06-03 N172KJ AUZ → AUZ Jun 3, 12:45 UTCJun 3, 13:35 UTC50m
2026-06-03 N172KJ - Jun 3, 02:00 UTCJun 3, 03:00 UTC1h 0m
2026-06-03 N172KJ - Jun 3, 00:00 UTCJun 3, 00:55 UTC55m
2026-06-02 N172KJ - Jun 2, 19:20 UTCJun 2, 20:40 UTC1h 20m
2026-06-02 N172KJ - Jun 2, 17:10 UTCJun 2, 17:55 UTC45m
2026-06-02 N172KJ - Jun 2, 14:30 UTCJun 2, 15:50 UTC1h 20m
2026-06-01 N172KJ AUZ → AUZ Jun 1, 23:50 UTCJun 2, 00:50 UTC1h 0m
2026-06-01 N172KJ - Jun 1, 21:30 UTCJun 1, 22:45 UTC1h 15m
2026-06-01 N172KJ - Jun 1, 19:45 UTCJun 1, 20:30 UTC45m
2026-06-01 N172KJ - Jun 1, 16:50 UTCJun 1, 17:50 UTC1h 0m
2026-06-01 N172KJ - Jun 1, 14:30 UTCJun 1, 15:50 UTC1h 20m
2026-06-01 N172KJ - Jun 1, 12:45 UTCJun 1, 13:40 UTC55m
2026-05-31 N172KJ AUZ → AUZ May 31, 20:05 UTCMay 31, 20:25 UTC20m
2026-05-31 N172KJ - May 31, 16:20 UTCMay 31, 17:10 UTC50m
2026-05-31 N172KJ - May 31, 14:30 UTCMay 31, 15:05 UTC35m
2026-05-30 N172KJ - May 30, 18:00 UTCMay 30, 19:05 UTC1h 5m
2026-05-30 N172KJ - May 30, 14:55 UTCMay 30, 15:50 UTC55m
2026-05-29 N172KJ AUZ → AUZ May 29, 21:35 UTCMay 29, 22:15 UTC40m
2026-05-29 N172KJ - May 29, 14:50 UTCMay 29, 15:40 UTC50m
2026-05-20 N172KJ - May 20, 21:35 UTCMay 21, 00:10 UTC2h 35m
2026-05-20 N172KJ - May 20, 16:30 UTCMay 20, 17:35 UTC1h 5m
2026-05-20 N172KJ AUZ → AUZ May 20, 15:05 UTCMay 20, 15:45 UTC40m
2026-05-19 N172KJ - May 19, 22:05 UTCMay 19, 22:35 UTC30m
2026-05-19 N172KJ - May 19, 21:20 UTCMay 19, 21:35 UTC15m
2026-05-18 N172KJ - May 18, 19:50 UTCMay 18, 20:50 UTC1h 0m
2026-05-17 N172KJ - May 17, 16:45 UTCMay 17, 17:25 UTC40m
2026-05-16 N172KJ AUZ → AUZ May 16, 17:30 UTCMay 16, 18:35 UTC1h 5m
2026-05-16 N172KJ - May 16, 14:25 UTCMay 16, 15:45 UTC1h 20m
2026-05-14 N172KJ AUZ → AUZ May 14, 21:45 UTCMay 14, 22:20 UTC35m
2026-05-14 N172KJ - May 14, 19:45 UTCMay 14, 20:50 UTC1h 5m
2026-05-14 N172KJ - May 14, 18:05 UTCMay 14, 18:20 UTC15m
2026-05-14 N172KJ - May 14, 16:35 UTCMay 14, 17:15 UTC40m
2026-05-14 N172KJ AUZ → AUZ May 14, 14:30 UTCMay 14, 15:35 UTC1h 5m
2026-05-14 N172KJ - May 14, 02:15 UTCMay 14, 03:20 UTC1h 5m
2026-05-13 N172KJ - May 13, 14:30 UTCMay 13, 15:45 UTC1h 15m
2026-05-13 N172KJ - May 13, 03:40 UTCMay 13, 04:35 UTC55m
2026-05-13 N172KJ - May 13, 00:35 UTCMay 13, 01:00 UTC25m
2026-05-12 N172KJ - May 12, 20:25 UTCMay 12, 20:50 UTC25m
2026-05-12 N172KJ - May 12, 17:30 UTCMay 12, 18:35 UTC1h 5m
2026-05-12 N172KJ AUZ → AUZ May 12, 14:35 UTCMay 12, 15:35 UTC1h 0m
2026-05-11 N172KJ - May 11, 19:45 UTCMay 11, 20:40 UTC55m
2026-05-11 N172KJ - May 11, 16:55 UTCMay 11, 18:15 UTC1h 21m

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 N172KJ page for operator, model, and routing details .

Mode-S A12185 frequently asked

What is Mode-S code A12185?
A12185 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N172KJ.
Where is Mode-S A12185 registered?
Mode-S code A12185 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 A12185 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A12185, octal 50220605, decimal 10,559,877.
What flights does A12185 operate?
Mode-S A12185 has broadcast 1 distinct callsign, including N172KJ.