Apparatus

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sensors Mode-S transponder

A120AF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N172AV · CESSNA 172 Skyhawk · operated by FLIGHT TRAINING AIRCRAFT LLC

Hex
A120AF
Octal
50220257
Decimal
10,559,663
Country
US
Tail
N172AV
Type
C172
Broadcasting now · callsign CXK276 · 9,575 ft
Flights observed
162
Distinct callsigns
1
Country
US
Last broadcast
3h ago

Current position

A120AF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A120AF 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
CXK276 - 162 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 CXK276 SAC → MFR Jul 17, 15:25 UTCJul 17, 18:50 UTC3h 25m
2026-07-17 CXK276 - Jul 17, 05:35 UTCJul 17, 06:54 UTC1h 20m
2026-07-17 CXK276 SMF → SMF Jul 17, 05:15 UTCJul 17, 05:25 UTC10m
2026-07-17 CXK276 SAC → SMF Jul 17, 04:39 UTCJul 17, 04:59 UTC20m
2026-07-16 CXK276 SAC → SAC Jul 16, 22:15 UTCJul 17, 00:45 UTC2h 30m
2026-07-16 CXK276 SAC → SAC Jul 16, 15:05 UTCJul 16, 17:30 UTC2h 25m
2026-07-15 CXK276 - Jul 15, 23:35 UTCJul 16, 00:15 UTC40m
2026-07-15 CXK276 - Jul 15, 21:15 UTCJul 15, 22:25 UTC1h 10m
2026-07-15 CXK276 - Jul 15, 17:30 UTCJul 15, 18:20 UTC50m
2026-07-14 CXK276 SAC → SAC Jul 14, 20:35 UTCJul 14, 21:40 UTC1h 5m
2026-07-14 CXK276 SAC → SAC Jul 14, 18:05 UTCJul 14, 19:30 UTC1h 25m
2026-07-10 CXK276 SAC → SAC Jul 10, 19:20 UTCJul 10, 19:50 UTC30m
2026-07-09 CXK276 SAC → SAC Jul 9, 18:40 UTCJul 9, 19:20 UTC40m
2026-07-09 CXK276 SAC → SAC Jul 9, 15:50 UTCJul 9, 17:25 UTC1h 35m
2026-06-30 CXK276 SAC → SAC Jun 30, 22:25 UTCJun 30, 23:50 UTC1h 25m
2026-06-30 CXK276 SAC → SAC Jun 30, 18:30 UTCJun 30, 19:55 UTC1h 25m
2026-06-28 CXK276 SAC → SAC Jun 28, 15:09 UTCJun 28, 17:30 UTC2h 20m
2026-06-28 CXK276 SAC → SAC Jun 28, 12:15 UTCJun 28, 14:09 UTC1h 55m
2026-06-27 CXK276 SAC → SAC Jun 27, 23:45 UTCJun 28, 00:20 UTC35m
2026-06-27 CXK276 SAC → SAC Jun 27, 21:15 UTCJun 27, 21:55 UTC40m
2026-06-27 CXK276 SAC → SAC Jun 27, 15:05 UTCJun 27, 16:24 UTC1h 20m
2026-06-26 CXK276 SAC → SAC Jun 26, 19:20 UTCJun 26, 19:55 UTC35m
2026-06-25 CXK276 SAC → SAC Jun 25, 22:59 UTCJun 26, 01:24 UTC2h 25m
2026-06-25 CXK276 SAC → SAC Jun 25, 19:09 UTCJun 25, 20:05 UTC55m
2026-06-25 CXK276 SAC → SAC Jun 25, 16:39 UTCJun 25, 16:55 UTC15m
2026-06-25 CXK276 SAC → SAC Jun 25, 16:14 UTCJun 25, 16:24 UTC10m
2026-06-25 CXK276 SAC → SAC Jun 25, 15:40 UTCJun 25, 15:54 UTC15m
2026-06-25 CXK276 SAC → SAC Jun 25, 15:15 UTCJun 25, 15:24 UTC10m
2026-06-25 CXK276 SAC → SAC Jun 25, 15:04 UTCJun 25, 15:10 UTC5m
2026-06-25 CXK276 SAC → SAC Jun 25, 01:54 UTCJun 25, 03:29 UTC1h 35m
2026-06-24 CXK276 SAC → SAC Jun 24, 18:20 UTCJun 24, 20:54 UTC2h 35m
2026-06-24 CXK276 SAC → SAC Jun 24, 01:19 UTCJun 24, 02:54 UTC1h 35m
2026-06-23 CXK276 SAC → SAC Jun 23, 20:29 UTCJun 23, 22:55 UTC2h 25m
2026-06-22 CXK276 SAC → SAC Jun 22, 12:49 UTCJun 22, 14:19 UTC1h 30m
2026-06-22 CXK276 SAC → SAC Jun 22, 02:25 UTCJun 22, 03:35 UTC1h 10m
2026-06-21 CXK276 SAC → SAC Jun 21, 23:34 UTCJun 22, 01:40 UTC2h 5m
2026-06-21 CXK276 SAC → SAC Jun 21, 02:35 UTCJun 21, 04:10 UTC1h 35m
2026-06-20 CXK276 SAC → SAC Jun 20, 23:10 UTCJun 21, 01:25 UTC2h 15m
2026-06-20 CXK276 SAC → SAC Jun 20, 18:54 UTCJun 20, 19:34 UTC40m
2026-06-20 CXK276 SAC → SAC Jun 20, 02:35 UTCJun 20, 04:24 UTC1h 50m
2026-06-19 CXK276 SAC → SAC Jun 19, 20:04 UTCJun 19, 21:04 UTC1h 0m
2026-06-19 CXK276 SAC → SAC Jun 19, 00:14 UTCJun 19, 02:19 UTC2h 5m
2026-06-18 CXK276 - Jun 18, 22:10 UTCJun 18, 22:45 UTC35m
2026-06-18 CXK276 SAC → SAC Jun 18, 17:55 UTCJun 18, 19:40 UTC1h 45m
2026-06-12 CXK276 SAC → SAC Jun 12, 02:10 UTCJun 12, 03:45 UTC1h 35m
2026-06-11 CXK276 SAC → SAC Jun 11, 20:45 UTCJun 11, 22:25 UTC1h 40m
2026-06-11 CXK276 SAC → SAC Jun 11, 15:00 UTCJun 11, 16:30 UTC1h 30m
2026-06-11 CXK276 - Jun 11, 00:00 UTCJun 11, 01:55 UTC1h 55m
2026-06-10 CXK276 - Jun 10, 17:10 UTCJun 10, 18:55 UTC1h 45m
2026-06-10 CXK276 - Jun 10, 06:25 UTCJun 10, 07:35 UTC1h 10m

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 N172AV page for operator, model, and routing details .

Mode-S A120AF frequently asked

What is Mode-S code A120AF?
A120AF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N172AV.
Where is Mode-S A120AF registered?
Mode-S code A120AF 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 A120AF broadcasting right now?
Yes. Mode-S A120AF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A120AF, octal 50220257, decimal 10,559,663.
What flights does A120AF operate?
Mode-S A120AF has broadcast 1 distinct callsign, including CXK276.