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sensors Mode-S transponder

A68690

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N51996 · CESSNA 172 Skyhawk · operated by SKYWARRIOR FLIGHT TRAINING INC

Hex
A68690
Octal
51503220
Decimal
10,913,424
Country
US
Tail
N51996
Type
C172
No current signal · last broadcast Jul 15, 17:00 UTC
Flights observed
127
Distinct callsigns
1
Country
US
Last broadcast
Jul 15, 17:00 UTC

Last known position

Most recent position reported by Mode-S A68690.

Country allocation

The ICAO 24-bit address A68690 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
N51996 - 126 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 N51996 - Jul 15, 16:00 UTCJul 15, 17:00 UTC1h 0m
2026-07-15 N51996 - Jul 15, 11:45 UTCJul 15, 13:35 UTC1h 50m
2026-07-14 N51996 - Jul 14, 15:15 UTCJul 14, 15:35 UTC20m
2026-07-10 N51996 - Jul 10, 22:25 UTCJul 11, 01:05 UTC2h 40m
2026-07-10 N51996 - Jul 10, 16:45 UTCJul 10, 16:55 UTC10m
2026-07-10 N51996 - Jul 10, 15:00 UTCJul 10, 15:30 UTC30m
2026-07-09 N51996 - Jul 9, 19:15 UTCJul 9, 20:45 UTC1h 30m
2026-07-08 N51996 - Jul 8, 21:10 UTCJul 8, 21:40 UTC30m
2026-07-08 N51996 - Jul 8, 19:55 UTCJul 8, 20:05 UTC10m
2026-07-02 N51996 - Jul 2, 23:00 UTCJul 2, 23:10 UTC10m
2026-07-02 N51996 - Jul 2, 18:50 UTCJul 2, 19:05 UTC15m
2026-07-02 N51996 - Jul 2, 16:15 UTCJul 2, 16:25 UTC10m
2026-07-02 N51996 - Jul 2, 14:40 UTCJul 2, 14:55 UTC15m
2026-07-01 N51996 - Jul 1, 19:45 UTCJul 1, 20:05 UTC20m
2026-07-01 N51996 - Jul 1, 16:00 UTCJul 1, 16:50 UTC50m
2026-07-01 N51996 - Jul 1, 11:35 UTCJul 1, 13:50 UTC2h 15m
2026-06-30 N51996 MOB → PNS Jun 30, 15:40 UTCJun 30, 17:25 UTC1h 45m
2026-06-30 N51996 - Jun 30, 13:05 UTCJun 30, 14:35 UTC1h 30m
2026-06-29 N51996 - Jun 29, 22:10 UTCJun 29, 22:24 UTC15m
2026-06-29 N51996 - Jun 29, 18:44 UTCJun 29, 20:00 UTC1h 15m
2026-06-29 N51996 - Jun 29, 16:19 UTCJun 29, 17:55 UTC1h 35m
2026-06-29 N51996 - Jun 29, 12:39 UTCJun 29, 14:09 UTC1h 30m
2026-06-28 N51996 - Jun 28, 20:25 UTCJun 28, 20:59 UTC35m
2026-06-28 N51996 - Jun 28, 18:49 UTCJun 28, 19:25 UTC35m
2026-06-28 N51996 - Jun 28, 16:09 UTCJun 28, 17:50 UTC1h 40m
2026-06-28 N51996 - Jun 28, 12:44 UTCJun 28, 14:54 UTC2h 10m
2026-06-27 N51996 - Jun 27, 21:25 UTCJun 27, 21:34 UTC10m
2026-06-27 N51996 - Jun 27, 19:59 UTCJun 27, 20:49 UTC50m
2026-06-27 N51996 PNS → PNS Jun 27, 16:24 UTCJun 27, 17:29 UTC1h 5m
2026-06-27 N51996 PNS → PNS Jun 27, 13:24 UTCJun 27, 14:49 UTC1h 25m
2026-06-27 N51996 - Jun 27, 00:34 UTCJun 27, 01:09 UTC35m
2026-06-26 - - Jun 26, 23:25 UTCJun 26, 23:49 UTC25m
2026-06-26 N51996 - Jun 26, 22:29 UTCJun 26, 22:49 UTC20m
2026-06-26 N51996 - Jun 26, 20:10 UTCJun 26, 20:20 UTC10m
2026-06-26 N51996 - Jun 26, 17:19 UTCJun 26, 17:50 UTC30m
2026-06-25 N51996 - Jun 25, 22:10 UTCJun 25, 23:14 UTC1h 5m
2026-06-25 N51996 - Jun 25, 19:34 UTCJun 25, 20:49 UTC1h 15m
2026-06-25 N51996 - Jun 25, 14:24 UTCJun 25, 14:34 UTC10m
2026-06-24 N51996 - Jun 24, 22:10 UTCJun 24, 22:19 UTC10m
2026-06-24 N51996 - Jun 24, 19:44 UTCJun 24, 20:09 UTC25m
2026-06-23 N51996 - Jun 23, 23:59 UTCJun 24, 00:55 UTC55m
2026-06-23 N51996 - Jun 23, 22:10 UTCJun 23, 23:05 UTC55m
2026-06-23 N51996 - Jun 23, 18:55 UTCJun 23, 20:34 UTC1h 40m
2026-06-23 N51996 - Jun 23, 17:30 UTCJun 23, 17:39 UTC10m
2026-06-23 N51996 - Jun 23, 15:24 UTCJun 23, 15:34 UTC10m
2026-06-22 N51996 - Jun 22, 17:10 UTCJun 22, 18:40 UTC1h 30m
2026-06-22 N51996 - Jun 22, 04:24 UTCJun 22, 06:00 UTC1h 35m
2026-06-22 N51996 PNS → PNS Jun 22, 01:55 UTCJun 22, 03:24 UTC1h 30m
2026-06-19 N51996 - Jun 19, 20:29 UTCJun 19, 21:30 UTC1h 0m
2026-06-19 N51996 - Jun 19, 19:39 UTCJun 19, 19:49 UTC10m

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 N51996 page for operator, model, and routing details .

Mode-S A68690 frequently asked

What is Mode-S code A68690?
A68690 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N51996.
Where is Mode-S A68690 registered?
Mode-S code A68690 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 A68690 broadcasting right now?
No active broadcast right now. Last signal was Jul 15, 17:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A68690, octal 51503220, decimal 10,913,424.
What flights does A68690 operate?
Mode-S A68690 has broadcast 1 distinct callsign, including N51996.