Apparatus

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sensors Mode-S transponder

AB7704

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N838KS · CESSNA 172 Skyhawk · operated by KANSAS STATE UNIVERSITY, C/O POLYTECHNIC CAMPUS AVIATION DEPT

Hex
AB7704
Octal
52673404
Decimal
11,237,124
Country
US
Tail
N838KS
Type
C172
No current signal · last broadcast 3d ago
Flights observed
74
Distinct callsigns
1
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S AB7704.

Country allocation

The ICAO 24-bit address AB7704 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
KSU38 - 74 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 KSU38 - Jul 17, 21:50 UTCJul 17, 22:00 UTC10m
2026-07-14 KSU38 - Jul 14, 15:05 UTCJul 14, 15:20 UTC15m
2026-07-14 KSU38 - Jul 14, 03:00 UTCJul 14, 04:20 UTC1h 20m
2026-07-14 KSU38 - Jul 14, 00:25 UTCJul 14, 00:40 UTC15m
2026-07-08 KSU38 - Jul 8, 16:05 UTCJul 8, 16:35 UTC30m
2026-06-23 KSU38 - Jun 23, 12:20 UTCJun 23, 12:40 UTC20m
2026-06-22 KSU38 - Jun 22, 23:35 UTCJun 23, 03:15 UTC3h 40m
2026-06-15 KSU38 SLN → SLN Jun 15, 12:00 UTCJun 15, 12:55 UTC55m
2026-06-12 KSU38 SLN → SLN Jun 12, 23:25 UTCJun 13, 00:20 UTC55m
2026-06-12 KSU38 - Jun 12, 19:25 UTCJun 12, 21:10 UTC1h 45m
2026-06-12 KSU38 SLN → SLN Jun 12, 15:25 UTCJun 12, 16:35 UTC1h 10m
2026-06-12 KSU38 SLN → SLN Jun 12, 13:45 UTCJun 12, 14:45 UTC1h 0m
2026-06-12 KSU38 SLN → SLN Jun 12, 11:50 UTCJun 12, 13:00 UTC1h 10m
2026-06-12 KSU38 - Jun 12, 03:20 UTCJun 12, 03:45 UTC25m
2026-06-11 KSU38 - Jun 11, 23:30 UTCJun 12, 00:20 UTC50m
2026-06-09 KSU38 SLN → SLN Jun 9, 14:15 UTCJun 9, 15:05 UTC50m
2026-06-08 KSU38 SLN → SLN Jun 8, 22:15 UTCJun 8, 23:30 UTC1h 15m
2026-06-08 KSU38 SLN → SLN Jun 8, 18:50 UTCJun 8, 19:55 UTC1h 5m
2026-06-08 KSU38 SLN → SLN Jun 8, 16:35 UTCJun 8, 17:35 UTC1h 0m
2026-06-06 KSU38 SLN → SLN Jun 6, 02:40 UTCJun 6, 04:15 UTC1h 35m
2026-06-05 KSU38 SLN → SLN Jun 5, 20:45 UTCJun 5, 23:20 UTC2h 35m
2026-06-05 KSU38 SLN → SLN Jun 5, 15:15 UTCJun 5, 16:50 UTC1h 35m
2026-06-05 KSU38 - Jun 5, 12:15 UTCJun 5, 13:50 UTC1h 35m
2026-06-04 KSU38 SLN → SLN Jun 4, 17:05 UTCJun 4, 17:35 UTC30m
2026-06-03 KSU38 SLN → SLN Jun 3, 14:50 UTCJun 3, 15:50 UTC1h 0m
2026-06-03 KSU38 SLN → SLN Jun 3, 12:25 UTCJun 3, 13:00 UTC35m
2026-06-03 KSU38 - Jun 3, 01:20 UTCJun 3, 01:40 UTC20m
2026-06-03 KSU38 SLN → SLN Jun 3, 00:40 UTCJun 3, 01:00 UTC20m
2026-06-02 KSU38 SLN → SLN Jun 2, 21:50 UTCJun 2, 22:55 UTC1h 5m
2026-06-02 KSU38 SLN → SLN Jun 2, 19:10 UTCJun 2, 20:15 UTC1h 5m
2026-06-02 KSU38 SLN → SLN Jun 2, 16:45 UTCJun 2, 17:45 UTC1h 0m
2026-06-01 KSU38 - Jun 1, 20:40 UTCJun 1, 21:30 UTC50m
2026-06-01 KSU38 SLN → SLN Jun 1, 16:25 UTCJun 1, 17:15 UTC50m
2026-06-01 KSU38 SLN → SLN Jun 1, 14:40 UTCJun 1, 15:30 UTC50m
2026-05-27 KSU38 SLN → SLN May 27, 20:55 UTCMay 27, 21:35 UTC40m
2026-05-27 KSU38 SLN → SLN May 27, 14:15 UTCMay 27, 14:45 UTC30m
2026-05-26 KSU38 - May 26, 20:09 UTCMay 26, 22:59 UTC2h 50m
2026-05-26 KSU38 - May 26, 19:05 UTCMay 26, 19:34 UTC30m
2026-05-26 KSU38 SLN → SLN May 26, 16:40 UTCMay 26, 17:44 UTC1h 5m
2026-05-23 KSU38 SLN → SLN May 23, 21:15 UTCMay 23, 22:00 UTC45m
2026-05-23 KSU38 SLN → SLN May 23, 19:25 UTCMay 23, 20:25 UTC1h 0m
2026-05-23 KSU38 SLN → SLN May 23, 16:50 UTCMay 23, 17:55 UTC1h 5m
2026-05-23 KSU38 SLN → SLN May 23, 14:40 UTCMay 23, 15:55 UTC1h 15m
2026-05-20 KSU38 SLN → SLN May 20, 16:15 UTCMay 20, 16:45 UTC30m
2026-05-15 KSU38 SLN → SLN May 15, 13:15 UTCMay 15, 14:35 UTC1h 20m
2026-05-13 KSU38 SLN → SLN May 13, 21:55 UTCMay 13, 22:45 UTC50m
2026-05-13 KSU38 SLN → SLN May 13, 19:25 UTCMay 13, 20:10 UTC45m
2026-05-13 KSU38 SLN → SLN May 13, 16:20 UTCMay 13, 17:40 UTC1h 20m
2026-05-13 KSU38 - May 13, 13:50 UTCMay 13, 15:00 UTC1h 10m
2026-05-08 KSU38 - May 8, 23:35 UTCMay 8, 23:55 UTC20m

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 N838KS page for operator, model, and routing details .

Mode-S AB7704 frequently asked

What is Mode-S code AB7704?
AB7704 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N838KS.
Where is Mode-S AB7704 registered?
Mode-S code AB7704 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 AB7704 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB7704, octal 52673404, decimal 11,237,124.
What flights does AB7704 operate?
Mode-S AB7704 has broadcast 1 distinct callsign, including KSU38.