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sensors Mode-S transponder

AC71CF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N9002E · CESSNA 172 Skyhawk · operated by WISCONSIN AVIATION INC

Hex
AC71CF
Octal
53070717
Decimal
11,301,327
Country
US
Tail
N9002E
Type
C172
No current signal · last broadcast Jul 25, 06:15 UTC
Flights observed
198
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 06:15 UTC

Last known position

Most recent position reported by Mode-S AC71CF.

Country allocation

The ICAO 24-bit address AC71CF 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
N9002E - 198 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N9002E - Jul 25, 05:40 UTCJul 25, 06:15 UTC35m
2026-07-25 N9002E - Jul 25, 03:35 UTCJul 25, 04:55 UTC1h 20m
2026-07-23 N9002E - Jul 23, 18:40 UTCJul 23, 18:50 UTC10m
2026-07-18 N9002E - Jul 18, 13:15 UTCJul 18, 13:50 UTC35m
2026-07-17 N9002E - Jul 17, 17:25 UTCJul 17, 18:25 UTC1h 0m
2026-07-14 N9002E - Jul 14, 18:15 UTCJul 14, 19:35 UTC1h 20m
2026-07-14 N9002E - Jul 14, 15:00 UTCJul 14, 16:20 UTC1h 20m
2026-07-13 N9002E - Jul 13, 21:20 UTCJul 13, 22:45 UTC1h 25m
2026-07-13 N9002E - Jul 13, 20:20 UTCJul 13, 21:15 UTC55m
2026-07-13 N9002E - Jul 13, 19:40 UTCJul 13, 19:55 UTC15m
2026-07-13 N9002E - Jul 13, 15:05 UTCJul 13, 16:10 UTC1h 5m
2026-07-11 N9002E - Jul 11, 18:40 UTCJul 11, 19:35 UTC55m
2026-07-11 N9002E - Jul 11, 14:50 UTCJul 11, 15:15 UTC25m
2026-07-11 N9002E - Jul 11, 13:25 UTCJul 11, 13:50 UTC25m
2026-07-10 N9002E - Jul 10, 21:30 UTCJul 10, 21:40 UTC10m
2026-07-10 N9002E - Jul 10, 19:45 UTCJul 10, 20:35 UTC50m
2026-07-10 N9002E - Jul 10, 19:30 UTCJul 10, 19:40 UTC10m
2026-07-10 N9002E - Jul 10, 15:35 UTCJul 10, 17:00 UTC1h 25m
2026-07-10 N9002E - Jul 10, 13:15 UTCJul 10, 15:05 UTC1h 50m
2026-07-09 N9002E - Jul 9, 23:00 UTCJul 9, 23:40 UTC40m
2026-07-09 N9002E - Jul 9, 19:30 UTCJul 9, 20:50 UTC1h 20m
2026-07-09 N9002E - Jul 9, 15:40 UTCJul 9, 16:45 UTC1h 5m
2026-07-09 N9002E - Jul 9, 14:00 UTCJul 9, 14:20 UTC20m
2026-07-09 N9002E - Jul 9, 00:40 UTCJul 9, 00:55 UTC15m
2026-07-08 N9002E - Jul 8, 23:45 UTCJul 9, 00:25 UTC40m
2026-07-08 N9002E - Jul 8, 22:20 UTCJul 8, 22:35 UTC15m
2026-07-08 N9002E - Jul 8, 21:30 UTCJul 8, 22:10 UTC40m
2026-07-08 N9002E - Jul 8, 17:25 UTCJul 8, 17:40 UTC15m
2026-07-08 N9002E - Jul 8, 15:40 UTCJul 8, 16:40 UTC1h 0m
2026-07-08 N9002E - Jul 8, 02:05 UTCJul 8, 03:40 UTC1h 35m
2026-07-08 N9002E - Jul 8, 00:10 UTCJul 8, 00:35 UTC25m
2026-07-07 N9002E - Jul 7, 21:30 UTCJul 7, 22:25 UTC55m
2026-07-07 N9002E - Jul 7, 19:30 UTCJul 7, 20:40 UTC1h 10m
2026-07-06 N9002E - Jul 6, 23:50 UTCJul 7, 01:50 UTC2h 0m
2026-07-06 N9002E - Jul 6, 19:20 UTCJul 6, 19:40 UTC20m
2026-07-06 N9002E - Jul 6, 18:30 UTCJul 6, 19:15 UTC45m
2026-07-06 N9002E - Jul 6, 15:40 UTCJul 6, 16:45 UTC1h 5m
2026-07-03 N9002E - Jul 3, 21:30 UTCJul 3, 22:30 UTC1h 0m
2026-07-02 N9002E - Jul 2, 15:30 UTCJul 2, 17:40 UTC2h 10m
2026-07-01 N9002E - Jul 1, 21:15 UTCJul 1, 22:55 UTC1h 40m
2026-07-01 N9002E - Jul 1, 18:15 UTCJul 1, 19:10 UTC55m
2026-07-01 N9002E - Jul 1, 14:40 UTCJul 1, 15:45 UTC1h 5m
2026-07-01 N9002E - Jul 1, 02:15 UTCJul 1, 04:20 UTC2h 5m
2026-06-30 N9002E - Jun 30, 16:00 UTCJun 30, 16:40 UTC40m
2026-06-30 N9002E - Jun 30, 13:30 UTCJun 30, 13:55 UTC25m
2026-06-29 N9002E - Jun 29, 23:25 UTCJun 29, 23:49 UTC25m
2026-06-29 N9002E - Jun 29, 16:10 UTCJun 29, 16:50 UTC40m
2026-06-27 N9002E - Jun 27, 18:54 UTCJun 27, 20:39 UTC1h 45m
2026-06-27 N9002E - Jun 27, 13:24 UTCJun 27, 13:55 UTC30m
2026-06-27 N9002E - Jun 27, 13:09 UTCJun 27, 13:20 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 N9002E page for operator, model, and routing details .

Mode-S AC71CF frequently asked

What is Mode-S code AC71CF?
AC71CF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N9002E.
Where is Mode-S AC71CF registered?
Mode-S code AC71CF 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 AC71CF broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 06:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC71CF, octal 53070717, decimal 11,301,327.
What flights does AC71CF operate?
Mode-S AC71CF has broadcast 1 distinct callsign, including N9002E.