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sensors Mode-S transponder

A6E1E6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5421S · CESSNA 172 Skyhawk · operated by AMERIFLYERS OF TEXAS INC

Hex
A6E1E6
Octal
51560746
Decimal
10,936,806
Country
US
Tail
N5421S
Type
C172
No current signal · last broadcast 10h ago
Flights observed
224
Distinct callsigns
1
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A6E1E6.

Country allocation

The ICAO 24-bit address A6E1E6 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
N5421S - 224 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N5421S - Jul 13, 22:15 UTCJul 13, 22:50 UTC35m
2026-07-13 N5421S - Jul 13, 20:40 UTCJul 13, 21:20 UTC40m
2026-07-13 N5421S - Jul 13, 18:40 UTCJul 13, 19:15 UTC35m
2026-07-13 N5421S - Jul 13, 17:45 UTCJul 13, 18:05 UTC20m
2026-07-11 N5421S PPM → PPM Jul 11, 13:30 UTCJul 11, 14:55 UTC1h 25m
2026-07-09 N5421S - Jul 9, 21:45 UTCJul 9, 23:35 UTC1h 50m
2026-07-09 N5421S - Jul 9, 19:10 UTCJul 9, 20:05 UTC55m
2026-07-09 N5421S - Jul 9, 12:50 UTCJul 9, 13:50 UTC1h 0m
2026-07-09 N5421S - Jul 9, 11:30 UTCJul 9, 12:00 UTC30m
2026-07-08 N5421S - Jul 8, 22:05 UTCJul 8, 23:45 UTC1h 40m
2026-07-08 N5421S - Jul 8, 20:00 UTCJul 8, 20:35 UTC35m
2026-07-08 N5421S - Jul 8, 18:50 UTCJul 8, 19:10 UTC20m
2026-07-08 N5421S - Jul 8, 15:30 UTCJul 8, 15:45 UTC15m
2026-07-08 N5421S - Jul 8, 13:35 UTCJul 8, 13:55 UTC20m
2026-07-07 N5421S PPM → PPM Jul 7, 18:40 UTCJul 7, 20:25 UTC1h 45m
2026-07-07 N5421S - Jul 7, 15:30 UTCJul 7, 15:50 UTC20m
2026-07-07 N5421S - Jul 7, 13:35 UTCJul 7, 14:50 UTC1h 15m
2026-07-06 N5421S - Jul 6, 15:25 UTCJul 6, 15:50 UTC25m
2026-07-06 N5421S - Jul 6, 13:40 UTCJul 6, 14:50 UTC1h 10m
2026-07-04 N5421S - Jul 4, 13:55 UTCJul 4, 14:50 UTC55m
2026-07-04 N5421S - Jul 4, 12:55 UTCJul 4, 13:15 UTC20m
2026-07-02 N5421S PPM → PPM Jul 2, 20:45 UTCJul 2, 22:00 UTC1h 15m
2026-07-02 N5421S - Jul 2, 19:05 UTCJul 2, 19:30 UTC25m
2026-07-02 N5421S - Jul 2, 17:35 UTCJul 2, 18:30 UTC55m
2026-07-02 N5421S - Jul 2, 11:55 UTCJul 2, 12:45 UTC50m
2026-07-01 N5421S PPM → PPM Jul 1, 22:30 UTCJul 1, 22:50 UTC20m
2026-07-01 N5421S PPM → PPM Jul 1, 20:55 UTCJul 1, 21:40 UTC45m
2026-07-01 N5421S PPM → PPM Jul 1, 17:50 UTCJul 1, 19:25 UTC1h 35m
2026-07-01 N5421S - Jul 1, 16:05 UTCJul 1, 16:30 UTC25m
2026-07-01 N5421S - Jul 1, 14:50 UTCJul 1, 15:25 UTC35m
2026-06-30 N5421S - Jun 30, 18:00 UTCJun 30, 19:40 UTC1h 40m
2026-06-29 N5421S - Jun 29, 20:30 UTCJun 29, 21:44 UTC1h 15m
2026-06-29 N5421S PPM → PPM Jun 29, 17:34 UTCJun 29, 19:20 UTC1h 45m
2026-06-29 N5421S - Jun 29, 13:34 UTCJun 29, 15:14 UTC1h 40m
2026-06-28 N5421S - Jun 28, 17:00 UTCJun 28, 17:10 UTC10m
2026-06-28 N5421S - Jun 28, 16:05 UTCJun 28, 16:19 UTC15m
2026-06-28 N5421S - Jun 28, 01:15 UTCJun 28, 02:10 UTC55m
2026-06-27 N5421S - Jun 27, 21:19 UTCJun 27, 21:59 UTC40m
2026-06-27 N5421S - Jun 27, 19:59 UTCJun 27, 20:19 UTC20m
2026-06-26 N5421S - Jun 26, 19:50 UTCJun 26, 20:40 UTC50m
2026-06-26 N5421S - Jun 26, 15:54 UTCJun 26, 17:35 UTC1h 40m
2026-06-25 N5421S - Jun 25, 21:50 UTCJun 25, 23:39 UTC1h 50m
2026-06-25 N5421S - Jun 25, 18:45 UTCJun 25, 19:54 UTC1h 10m
2026-06-25 N5421S PPM → PPM Jun 25, 15:59 UTCJun 25, 17:54 UTC1h 55m
2026-06-24 N5421S PPM → PPM Jun 24, 23:04 UTCJun 25, 00:40 UTC1h 35m
2026-06-23 N5421S PPM → PPM Jun 23, 20:40 UTCJun 23, 21:54 UTC1h 15m
2026-06-23 N5421S - Jun 23, 14:25 UTCJun 23, 16:35 UTC2h 10m
2026-06-22 N5421S - Jun 22, 19:44 UTCJun 22, 20:39 UTC55m
2026-06-22 N5421S - Jun 22, 18:30 UTCJun 22, 19:09 UTC40m
2026-06-22 N5421S - Jun 22, 14:55 UTCJun 22, 16:10 UTC1h 15m

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 N5421S page for operator, model, and routing details .

Mode-S A6E1E6 frequently asked

What is Mode-S code A6E1E6?
A6E1E6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5421S.
Where is Mode-S A6E1E6 registered?
Mode-S code A6E1E6 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 A6E1E6 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6E1E6, octal 51560746, decimal 10,936,806.
What flights does A6E1E6 operate?
Mode-S A6E1E6 has broadcast 1 distinct callsign, including N5421S.