Apparatus

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sensors Mode-S transponder

A8A1BF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N65501 · CESSNA 172 Skyhawk · operated by RIGHT RUDDER ARIZONA LLC

Hex
A8A1BF
Octal
52120677
Decimal
11,051,455
Country
US
Tail
N65501
Type
C172
No current signal · last broadcast 1d ago
Flights observed
223
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A8A1BF.

Country allocation

The ICAO 24-bit address A8A1BF 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
N65501 - 223 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N65501 GYR → GYR Jul 26, 17:30 UTCJul 26, 18:00 UTC30m
2026-07-26 N65501 GYR → GYR Jul 26, 14:35 UTCJul 26, 15:50 UTC1h 15m
2026-07-25 N65501 GYR → GYR Jul 25, 16:00 UTCJul 25, 17:35 UTC1h 35m
2026-07-24 N65501 GYR → GYR Jul 24, 18:45 UTCJul 24, 19:50 UTC1h 5m
2026-07-24 N65501 GYR → GYR Jul 24, 17:20 UTCJul 24, 17:40 UTC20m
2026-07-24 N65501 GYR → GYR Jul 24, 15:40 UTCJul 24, 16:10 UTC30m
2026-07-24 N65501 GYR → GYR Jul 24, 13:45 UTCJul 24, 14:40 UTC55m
2026-07-23 N65501 GYR → GYR Jul 23, 15:30 UTCJul 23, 16:30 UTC1h 0m
2026-07-23 N65501 GYR → GYR Jul 23, 13:55 UTCJul 23, 14:35 UTC40m
2026-07-22 N65501 GYR → GYR Jul 22, 17:50 UTCJul 22, 18:55 UTC1h 5m
2026-07-22 N65501 GYR → GYR Jul 22, 15:55 UTCJul 22, 17:00 UTC1h 5m
2026-07-22 N65501 GYR → GYR Jul 22, 13:40 UTCJul 22, 14:45 UTC1h 5m
2026-07-21 N65501 GYR → GYR Jul 21, 21:00 UTCJul 21, 21:50 UTC50m
2026-07-21 N65501 GYR → GYR Jul 21, 13:35 UTCJul 21, 14:45 UTC1h 10m
2026-07-21 N65501 GYR → GYR Jul 21, 11:25 UTCJul 21, 12:25 UTC1h 0m
2026-07-20 N65501 - Jul 20, 14:15 UTCJul 20, 15:15 UTC1h 0m
2026-07-20 N65501 GYR → GYR Jul 20, 12:35 UTCJul 20, 13:40 UTC1h 5m
2026-07-19 N65501 GYR → GYR Jul 19, 00:55 UTCJul 19, 01:05 UTC10m
2026-07-15 N65501 GYR → GYR Jul 15, 15:40 UTCJul 15, 16:45 UTC1h 5m
2026-07-15 N65501 GYR → GYR Jul 15, 13:30 UTCJul 15, 14:45 UTC1h 15m
2026-07-14 N65501 GYR → GYR Jul 14, 15:35 UTCJul 14, 16:45 UTC1h 10m
2026-07-14 N65501 GYR → GYR Jul 14, 13:00 UTCJul 14, 13:30 UTC30m
2026-07-13 N65501 GYR → GYR Jul 13, 14:50 UTCJul 13, 16:05 UTC1h 15m
2026-07-13 N65501 GYR → GYR Jul 13, 12:25 UTCJul 13, 13:25 UTC1h 0m
2026-07-12 N65501 GYR → GYR Jul 12, 13:25 UTCJul 12, 14:30 UTC1h 5m
2026-07-11 N65501 GYR → GYR Jul 11, 15:25 UTCJul 11, 16:10 UTC45m
2026-07-10 N65501 - Jul 10, 17:45 UTCJul 10, 20:10 UTC2h 25m
2026-07-10 N65501 GYR → CLD Jul 10, 12:45 UTCJul 10, 15:35 UTC2h 50m
2026-07-09 N65501 GYR → GYR Jul 9, 16:30 UTCJul 9, 17:30 UTC1h 0m
2026-07-09 N65501 GYR → GYR Jul 9, 13:30 UTCJul 9, 14:50 UTC1h 20m
2026-07-08 N65501 GYR → GYR Jul 8, 14:55 UTCJul 8, 16:00 UTC1h 5m
2026-07-08 N65501 GYR → GYR Jul 8, 11:55 UTCJul 8, 12:55 UTC1h 0m
2026-07-07 N65501 GYR → GYR Jul 7, 17:15 UTCJul 7, 18:00 UTC45m
2026-07-07 N65501 GYR → GYR Jul 7, 15:15 UTCJul 7, 16:00 UTC45m
2026-07-06 N65501 GYR → GYR Jul 6, 16:35 UTCJul 6, 17:35 UTC1h 0m
2026-07-06 N65501 GYR → GYR Jul 6, 14:45 UTCJul 6, 15:45 UTC1h 0m
2026-07-06 N65501 - Jul 6, 11:45 UTCJul 6, 13:10 UTC1h 25m
2026-07-06 N65501 - Jul 6, 11:15 UTCJul 6, 11:40 UTC25m
2026-07-06 N65501 GYR → GYR Jul 6, 03:30 UTCJul 6, 04:20 UTC50m
2026-07-05 N65501 GYR → GYR Jul 5, 23:20 UTCJul 6, 01:00 UTC1h 40m
2026-07-05 N65501 GYR → GYR Jul 5, 03:20 UTCJul 5, 05:00 UTC1h 40m
2026-07-04 N65501 GYR → GYR Jul 4, 17:55 UTCJul 4, 18:55 UTC1h 0m
2026-07-04 N65501 GYR → GYR Jul 4, 15:50 UTCJul 4, 16:45 UTC55m
2026-07-04 N65501 GYR → GYR Jul 4, 13:45 UTCJul 4, 14:50 UTC1h 5m
2026-07-04 N65501 GYR → GYR Jul 4, 06:05 UTCJul 4, 06:10 UTC5m
2026-07-04 N65501 GYR → GYR Jul 4, 03:55 UTCJul 4, 04:10 UTC15m
2026-07-03 N65501 - Jul 3, 17:50 UTCJul 3, 18:30 UTC40m
2026-07-03 N65501 GYR → GYR Jul 3, 16:40 UTCJul 3, 17:05 UTC25m
2026-07-03 N65501 GYR → GYR Jul 3, 15:40 UTCJul 3, 16:05 UTC25m
2026-07-03 N65501 GYR → GYR Jul 3, 12:30 UTCJul 3, 13:35 UTC1h 5m

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 N65501 page for operator, model, and routing details .

Mode-S A8A1BF frequently asked

What is Mode-S code A8A1BF?
A8A1BF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N65501.
Where is Mode-S A8A1BF registered?
Mode-S code A8A1BF 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 A8A1BF broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8A1BF, octal 52120677, decimal 11,051,455.
What flights does A8A1BF operate?
Mode-S A8A1BF has broadcast 1 distinct callsign, including N65501.