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sensors Mode-S transponder

A120BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N172BF · CESSNA 172R Cutlass RG · operated by LEWIS UNIVERSITY

Hex
A120BA
Octal
50220272
Decimal
10,559,674
Country
US
Tail
N172BF
Type
C72R
No current signal · last broadcast 22d ago
Flights observed
147
Distinct callsigns
1
Country
US
Last broadcast
22d ago

Last known position

Most recent position reported by Mode-S A120BA.

Country allocation

The ICAO 24-bit address A120BA 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
N172BF - 147 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 N172BF - Jul 11, 14:35 UTCJul 11, 15:10 UTC35m
2026-07-09 N172BF LOT → LOT Jul 9, 17:00 UTCJul 9, 17:40 UTC40m
2026-07-09 N172BF - Jul 9, 14:35 UTCJul 9, 15:35 UTC1h 0m
2026-07-08 N172BF - Jul 8, 15:00 UTCJul 8, 16:40 UTC1h 40m
2026-07-08 N172BF - Jul 8, 00:40 UTCJul 8, 01:30 UTC50m
2026-07-07 N172BF - Jul 7, 18:50 UTCJul 7, 20:05 UTC1h 15m
2026-07-07 N172BF - Jul 7, 16:35 UTCJul 7, 17:25 UTC50m
2026-07-07 N172BF - Jul 7, 12:25 UTCJul 7, 13:45 UTC1h 20m
2026-07-07 N172BF - Jul 7, 03:05 UTCJul 7, 06:00 UTC2h 55m
2026-07-06 N172BF LOT → LOT Jul 6, 23:05 UTCJul 7, 00:10 UTC1h 5m
2026-07-06 N172BF - Jul 6, 14:30 UTCJul 6, 15:40 UTC1h 10m
2026-07-03 N172BF - Jul 3, 12:35 UTCJul 3, 13:35 UTC1h 0m
2026-07-02 N172BF - Jul 2, 16:45 UTCJul 2, 17:45 UTC1h 0m
2026-07-02 N172BF - Jul 2, 02:50 UTCJul 2, 04:05 UTC1h 15m
2026-07-01 N172BF - Jul 1, 03:00 UTCJul 1, 04:20 UTC1h 20m
2026-06-30 N172BF - Jun 30, 18:45 UTCJun 30, 19:40 UTC55m
2026-06-30 N172BF - Jun 30, 14:40 UTCJun 30, 15:40 UTC1h 0m
2026-06-29 N172BF - Jun 29, 18:55 UTCJun 29, 19:54 UTC1h 0m
2026-06-29 N172BF - Jun 29, 12:24 UTCJun 29, 13:30 UTC1h 5m
2026-06-29 N172BF - Jun 29, 02:14 UTCJun 29, 02:35 UTC20m
2026-06-29 N172BF - Jun 29, 00:14 UTCJun 29, 00:39 UTC25m
2026-06-27 N172BF LOT → LOT Jun 27, 19:00 UTCJun 27, 19:29 UTC30m
2026-06-27 N172BF LOT → LOT Jun 27, 02:45 UTCJun 27, 03:25 UTC40m
2026-06-27 N172BF LOT → LOT Jun 27, 00:05 UTCJun 27, 01:09 UTC1h 5m
2026-06-26 N172BF - Jun 26, 18:39 UTCJun 26, 20:00 UTC1h 20m
2026-06-25 N172BF - Jun 25, 20:09 UTCJun 25, 20:54 UTC45m
2026-06-25 N172BF - Jun 25, 19:05 UTCJun 25, 19:24 UTC20m
2026-06-25 N172BF - Jun 25, 18:15 UTCJun 25, 18:24 UTC10m
2026-06-25 N172BF - Jun 25, 16:55 UTCJun 25, 17:30 UTC35m
2026-06-25 N172BF - Jun 25, 15:54 UTCJun 25, 16:14 UTC20m
2026-06-25 N172BF - Jun 25, 14:20 UTCJun 25, 15:04 UTC45m
2026-06-24 N172BF - Jun 24, 14:34 UTCJun 24, 15:39 UTC1h 5m
2026-06-24 N172BF - Jun 24, 12:50 UTCJun 24, 13:40 UTC50m
2026-06-24 N172BF - Jun 24, 03:04 UTCJun 24, 04:59 UTC1h 55m
2026-06-23 N172BF - Jun 23, 22:44 UTCJun 24, 00:40 UTC1h 55m
2026-06-23 N172BF LOT → LOT Jun 23, 20:49 UTCJun 23, 21:54 UTC1h 5m
2026-06-23 N172BF - Jun 23, 18:50 UTCJun 23, 19:44 UTC55m
2026-06-23 N172BF LOT → LOT Jun 23, 17:20 UTCJun 23, 17:50 UTC30m
2026-06-23 N172BF - Jun 23, 14:44 UTCJun 23, 16:29 UTC1h 45m
2026-06-23 N172BF LOT → LOT Jun 23, 11:49 UTCJun 23, 13:00 UTC1h 10m
2026-06-23 N172BF - Jun 23, 00:00 UTCJun 23, 01:20 UTC1h 20m
2026-06-22 N172BF - Jun 22, 21:25 UTCJun 22, 22:15 UTC50m
2026-06-22 N172BF - Jun 22, 14:19 UTCJun 22, 15:14 UTC55m
2026-06-20 N172BF - Jun 20, 12:34 UTCJun 20, 13:49 UTC1h 15m
2026-06-19 N172BF LOT → LOT Jun 19, 20:09 UTCJun 19, 21:04 UTC55m
2026-06-19 N172BF - Jun 19, 18:25 UTCJun 19, 19:14 UTC50m
2026-06-19 N172BF - Jun 19, 16:59 UTCJun 19, 17:49 UTC50m
2026-06-19 N172BF - Jun 19, 14:34 UTCJun 19, 15:39 UTC1h 5m
2026-06-19 N172BF - Jun 19, 12:04 UTCJun 19, 13:39 UTC1h 35m
2026-06-19 N172BF - Jun 19, 00:24 UTCJun 19, 00:49 UTC25m

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 N172BF page for operator, model, and routing details .

Mode-S A120BA frequently asked

What is Mode-S code A120BA?
A120BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N172BF.
Where is Mode-S A120BA registered?
Mode-S code A120BA 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 A120BA broadcasting right now?
No active broadcast right now. Last signal was 22d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A120BA, octal 50220272, decimal 10,559,674.
What flights does A120BA operate?
Mode-S A120BA has broadcast 1 distinct callsign, including N172BF.