Apparatus

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sensors Mode-S transponder

A120A6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N172AL · operated by DATASTACK

Hex
A120A6
Octal
50220246
Decimal
10,559,654
Country
US
Tail
N172AL
Type
C172
No current signal · last broadcast 1d ago
Flights observed
252
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A120A6.

Country allocation

The ICAO 24-bit address A120A6 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
N172AL - 252 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 N172AL PAO → PAO Jul 12, 23:10 UTCJul 13, 00:35 UTC1h 25m
2026-07-12 N172AL PAO → PAO Jul 12, 21:25 UTCJul 12, 22:25 UTC1h 0m
2026-07-12 N172AL PAO → PAO Jul 12, 18:25 UTCJul 12, 18:35 UTC10m
2026-07-12 N172AL PAO → PAO Jul 12, 18:10 UTCJul 12, 18:20 UTC10m
2026-07-12 N172AL - Jul 12, 17:55 UTCJul 12, 18:05 UTC10m
2026-07-12 N172AL PAO → PAO Jul 12, 17:35 UTCJul 12, 17:40 UTC5m
2026-07-11 N172AL PAO → PAO Jul 11, 23:05 UTCJul 11, 23:55 UTC50m
2026-07-11 N172AL PAO → PAO Jul 11, 20:20 UTCJul 11, 22:10 UTC1h 50m
2026-07-11 N172AL PAO → PAO Jul 11, 00:45 UTCJul 11, 02:35 UTC1h 50m
2026-07-10 N172AL PAO → PAO Jul 10, 23:00 UTCJul 10, 23:50 UTC50m
2026-07-10 N172AL PAO → PAO Jul 10, 19:00 UTCJul 10, 19:45 UTC45m
2026-07-10 N172AL - Jul 10, 00:40 UTCJul 10, 01:45 UTC1h 5m
2026-07-10 N172AL PAO → CCR Jul 10, 00:05 UTCJul 10, 00:35 UTC30m
2026-07-09 N172AL PAO → PAO Jul 9, 18:45 UTCJul 9, 19:45 UTC1h 0m
2026-07-09 N172AL PAO → PAO Jul 9, 17:30 UTCJul 9, 17:40 UTC10m
2026-07-09 N172AL PAO → PAO Jul 9, 17:15 UTCJul 9, 17:25 UTC10m
2026-07-09 N172AL PAO → PAO Jul 9, 16:45 UTCJul 9, 17:05 UTC20m
2026-07-08 N172AL SQL → PAO Jul 8, 19:50 UTCJul 8, 20:40 UTC50m
2026-07-08 N172AL PAO → SQL Jul 8, 19:40 UTCJul 8, 19:45 UTC5m
2026-07-07 N172AL PAO → PAO Jul 7, 20:15 UTCJul 7, 20:35 UTC20m
2026-07-07 N172AL PAO → PAO Jul 7, 19:55 UTCJul 7, 20:05 UTC10m
2026-07-07 N172AL PAO → PAO Jul 7, 15:45 UTCJul 7, 16:20 UTC35m
2026-07-05 N172AL PAO → PAO Jul 5, 18:10 UTCJul 5, 18:55 UTC45m
2026-07-05 N172AL PAO → PAO Jul 5, 05:00 UTCJul 5, 06:35 UTC1h 35m
2026-07-05 N172AL SJC → PAO Jul 5, 04:10 UTCJul 5, 04:20 UTC10m
2026-07-05 N172AL PAO → RHV Jul 5, 03:05 UTCJul 5, 03:20 UTC15m
2026-07-04 N172AL PAO → PAO Jul 4, 19:15 UTCJul 4, 19:20 UTC5m
2026-07-04 N172AL - Jul 4, 18:45 UTCJul 4, 18:55 UTC10m
2026-07-04 N172AL PAO → PAO Jul 4, 18:15 UTCJul 4, 18:25 UTC10m
2026-07-04 N172AL PAO → PAO Jul 4, 17:50 UTCJul 4, 18:10 UTC20m
2026-07-04 N172AL PAO → PAO Jul 4, 05:25 UTCJul 4, 05:50 UTC25m
2026-07-03 N172AL - Jul 3, 21:50 UTCJul 3, 22:25 UTC35m
2026-07-03 N172AL PAO → PAO Jul 3, 21:20 UTCJul 3, 21:45 UTC25m
2026-07-03 N172AL PAO → PAO Jul 3, 17:25 UTCJul 3, 18:55 UTC1h 30m
2026-07-02 N172AL PAO → PAO Jul 2, 23:15 UTCJul 2, 23:50 UTC35m
2026-07-02 N172AL PAO → PAO Jul 2, 15:25 UTCJul 2, 17:15 UTC1h 50m
2026-07-01 N172AL PAO → PAO Jul 1, 16:25 UTCJul 1, 16:35 UTC10m
2026-07-01 N172AL PAO → PAO Jul 1, 15:40 UTCJul 1, 16:20 UTC40m
2026-06-30 N172AL PAO → PAO Jun 30, 02:05 UTCJun 30, 04:00 UTC1h 55m
2026-06-29 N172AL PAO → PAO Jun 29, 20:49 UTCJun 29, 23:34 UTC2h 45m
2026-06-29 N172AL PAO → PAO Jun 29, 17:30 UTCJun 29, 19:29 UTC2h 0m
2026-06-28 N172AL PAO → PAO Jun 28, 21:59 UTCJun 28, 23:25 UTC1h 25m
2026-06-27 N172AL PAO → PAO Jun 27, 22:35 UTCJun 28, 02:10 UTC3h 35m
2026-06-27 N172AL PAO → PAO Jun 27, 19:59 UTCJun 27, 21:40 UTC1h 40m
2026-06-27 N172AL PAO → PAO Jun 27, 17:55 UTCJun 27, 18:54 UTC1h 0m
2026-06-26 N172AL PAO → PAO Jun 26, 23:25 UTCJun 27, 00:25 UTC1h 0m
2026-06-26 N172AL PAO → PAO Jun 26, 19:39 UTCJun 26, 19:45 UTC5m
2026-06-26 N172AL PAO → PAO Jun 26, 19:24 UTCJun 26, 19:30 UTC5m
2026-06-26 N172AL PAO → PAO Jun 26, 19:04 UTCJun 26, 19:20 UTC15m
2026-06-26 N172AL PAO → PAO Jun 26, 17:09 UTCJun 26, 17:19 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 N172AL page for operator, model, and routing details .

Mode-S A120A6 frequently asked

What is Mode-S code A120A6?
A120A6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N172AL.
Where is Mode-S A120A6 registered?
Mode-S code A120A6 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 A120A6 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 A120A6, octal 50220246, decimal 10,559,654.
What flights does A120A6 operate?
Mode-S A120A6 has broadcast 1 distinct callsign, including N172AL.