Apparatus

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sensors Mode-S transponder

A6C03B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N534KS · CESSNA 172 Skyhawk · operated by KENT STATE UNIVERSITY

Hex
A6C03B
Octal
51540073
Decimal
10,928,187
Country
US
Tail
N534KS
Type
C172
No current signal · last broadcast Jul 19, 17:05 UTC
Flights observed
142
Distinct callsigns
1
Country
US
Last broadcast
Jul 19, 17:05 UTC

Last known position

Most recent position reported by Mode-S A6C03B.

Country allocation

The ICAO 24-bit address A6C03B 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
KSF34 - 142 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-19 KSF34 - Jul 19, 15:00 UTCJul 19, 17:05 UTC2h 5m
2026-07-17 KSF34 - Jul 17, 13:15 UTCJul 17, 14:20 UTC1h 5m
2026-07-15 KSF34 - Jul 15, 19:40 UTCJul 15, 20:45 UTC1h 5m
2026-07-15 KSF34 - Jul 15, 17:20 UTCJul 15, 18:10 UTC50m
2026-07-15 KSF34 - Jul 15, 14:55 UTCJul 15, 15:50 UTC55m
2026-07-14 KSF34 - Jul 14, 22:40 UTCJul 15, 00:50 UTC2h 9m
2026-07-14 KSF34 - Jul 14, 18:45 UTCJul 14, 19:35 UTC50m
2026-07-14 KSF34 - Jul 14, 14:35 UTCJul 14, 15:20 UTC45m
2026-07-13 KSF34 - Jul 13, 20:50 UTCJul 13, 21:50 UTC1h 0m
2026-07-13 KSF34 - Jul 13, 18:30 UTCJul 13, 19:20 UTC50m
2026-07-12 KSF34 - Jul 12, 17:25 UTCJul 12, 20:05 UTC2h 40m
2026-07-09 KSF34 - Jul 9, 22:15 UTCJul 9, 23:00 UTC45m
2026-07-09 KSF34 - Jul 9, 13:50 UTCJul 9, 14:55 UTC1h 5m
2026-07-09 KSF34 - Jul 9, 01:50 UTCJul 9, 02:45 UTC55m
2026-07-08 KSF34 - Jul 8, 21:35 UTCJul 8, 21:45 UTC10m
2026-07-08 KSF34 - Jul 8, 18:15 UTCJul 8, 20:55 UTC2h 40m
2026-07-07 KSF34 - Jul 7, 18:15 UTCJul 7, 19:00 UTC45m
2026-07-02 KSF34 - Jul 2, 14:00 UTCJul 2, 15:20 UTC1h 20m
2026-07-01 KSF34 - Jul 1, 18:25 UTCJul 1, 19:20 UTC55m
2026-07-01 KSF34 - Jul 1, 13:20 UTCJul 1, 16:10 UTC2h 50m
2026-06-30 KSF34 - Jun 30, 14:55 UTCJun 30, 15:40 UTC45m
2026-06-30 KSF34 - Jun 30, 00:30 UTCJun 30, 01:25 UTC55m
2026-06-29 KSF34 - Jun 29, 22:19 UTCJun 29, 23:05 UTC45m
2026-06-29 KSF34 - Jun 29, 20:44 UTCJun 29, 21:24 UTC40m
2026-06-29 KSF34 - Jun 29, 18:34 UTCJun 29, 19:15 UTC40m
2026-06-29 KSF34 - Jun 29, 14:44 UTCJun 29, 15:24 UTC40m
2026-06-29 KSF34 - Jun 29, 12:49 UTCJun 29, 13:30 UTC40m
2026-06-27 KSF34 - Jun 27, 16:30 UTCJun 27, 17:34 UTC1h 5m
2026-06-26 KSF34 - Jun 26, 21:15 UTCJun 26, 22:34 UTC1h 20m
2026-06-26 KSF34 - Jun 26, 19:00 UTCJun 26, 20:15 UTC1h 15m
2026-06-26 KSF34 - Jun 26, 16:49 UTCJun 26, 17:19 UTC30m
2026-06-26 KSF34 - Jun 26, 14:39 UTCJun 26, 15:25 UTC45m
2026-06-26 KSF34 - Jun 26, 12:24 UTCJun 26, 13:19 UTC55m
2026-06-25 KSF34 - Jun 25, 16:14 UTCJun 25, 17:44 UTC1h 30m
2026-06-25 KSF34 - Jun 25, 13:40 UTCJun 25, 13:59 UTC20m
2026-06-24 KSF34 - Jun 24, 23:00 UTCJun 25, 01:30 UTC2h 30m
2026-06-24 KSF34 - Jun 24, 20:24 UTCJun 24, 21:34 UTC1h 10m
2026-06-24 KSF34 - Jun 24, 18:39 UTCJun 24, 19:20 UTC40m
2026-06-24 KSF34 - Jun 24, 15:14 UTCJun 24, 17:59 UTC2h 45m
2026-06-24 KSF34 - Jun 24, 12:40 UTCJun 24, 13:44 UTC1h 5m
2026-06-24 KSF34 - Jun 24, 03:00 UTCJun 24, 04:05 UTC1h 5m
2026-06-24 KSF34 - Jun 24, 01:55 UTCJun 24, 02:15 UTC20m
2026-06-23 KSF34 - Jun 23, 20:40 UTCJun 23, 23:10 UTC2h 30m
2026-06-23 KSF34 - Jun 23, 18:45 UTCJun 23, 19:24 UTC40m
2026-06-23 KSF34 - Jun 23, 16:29 UTCJun 23, 17:20 UTC50m
2026-06-23 KSF34 - Jun 23, 14:44 UTCJun 23, 15:34 UTC50m
2026-06-21 KSF34 - Jun 21, 22:15 UTCJun 21, 22:54 UTC40m
2026-06-21 KSF34 - Jun 21, 18:20 UTCJun 21, 20:34 UTC2h 15m
2026-06-16 KSF34 - Jun 16, 12:39 UTCJun 16, 13:34 UTC55m
2026-06-15 KSF34 - Jun 15, 19:10 UTCJun 15, 19:55 UTC45m

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 N534KS page for operator, model, and routing details .

Mode-S A6C03B frequently asked

What is Mode-S code A6C03B?
A6C03B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N534KS.
Where is Mode-S A6C03B registered?
Mode-S code A6C03B 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 A6C03B broadcasting right now?
No active broadcast right now. Last signal was Jul 19, 17:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6C03B, octal 51540073, decimal 10,928,187.
What flights does A6C03B operate?
Mode-S A6C03B has broadcast 1 distinct callsign, including KSF34.