Apparatus

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sensors Mode-S transponder

A125FC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N173TA · AIR TRACTOR AT-802 · operated by TAYLOR AVIATION INC

Hex
A125FC
Octal
50222774
Decimal
10,561,020
Country
US
Tail
N173TA
Type
AT8T
No current signal · last broadcast 10d ago
Flights observed
102
Distinct callsigns
1
Country
US
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S A125FC.

Country allocation

The ICAO 24-bit address A125FC 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
TKR873 - 102 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TKR873 - Jul 26, 17:55 UTCJul 26, 18:15 UTC20m
2026-07-26 TKR873 - Jul 26, 00:50 UTCJul 26, 01:10 UTC20m
2026-07-25 TKR873 - Jul 25, 23:30 UTCJul 25, 23:55 UTC25m
2026-07-25 TKR873 - Jul 25, 22:15 UTCJul 25, 22:45 UTC30m
2026-07-19 TKR873 - Jul 19, 03:00 UTCJul 19, 03:25 UTC25m
2026-07-19 TKR873 - Jul 19, 01:30 UTCJul 19, 02:00 UTC30m
2026-07-15 TKR873 - Jul 15, 21:20 UTCJul 15, 21:50 UTC30m
2026-07-15 TKR873 - Jul 15, 20:30 UTCJul 15, 21:00 UTC30m
2026-07-15 TKR873 - Jul 15, 19:45 UTCJul 15, 20:20 UTC35m
2026-07-14 TKR873 - Jul 14, 18:20 UTCJul 14, 18:45 UTC25m
2026-07-14 TKR873 - Jul 14, 17:45 UTCJul 14, 18:15 UTC30m
2026-07-14 TKR873 - Jul 14, 16:25 UTCJul 14, 17:30 UTC1h 5m
2026-07-14 TKR873 - Jul 14, 01:40 UTCJul 14, 02:00 UTC20m
2026-07-14 TKR873 - Jul 14, 00:55 UTCJul 14, 01:30 UTC35m
2026-07-13 TKR873 - Jul 13, 22:50 UTCJul 13, 23:20 UTC30m
2026-07-13 TKR873 - Jul 13, 20:35 UTCJul 13, 21:00 UTC25m
2026-07-13 TKR873 - Jul 13, 19:15 UTCJul 13, 19:40 UTC25m
2026-07-13 TKR873 - Jul 13, 18:35 UTCJul 13, 19:05 UTC30m
2026-07-13 TKR873 - Jul 13, 17:50 UTCJul 13, 18:25 UTC35m
2026-07-13 TKR873 - Jul 13, 17:00 UTCJul 13, 17:35 UTC35m
2026-07-13 TKR873 - Jul 13, 00:05 UTCJul 13, 01:20 UTC1h 15m
2026-07-12 TKR873 - Jul 12, 21:55 UTCJul 12, 22:55 UTC1h 0m
2026-07-12 TKR873 - Jul 12, 20:40 UTCJul 12, 21:45 UTC1h 5m
2026-07-12 TKR873 - Jul 12, 19:10 UTCJul 12, 19:40 UTC30m
2026-07-12 TKR873 - Jul 12, 18:25 UTCJul 12, 19:01 UTC35m
2026-07-12 TKR873 - Jul 12, 17:40 UTCJul 12, 18:15 UTC35m
2026-07-11 TKR873 - Jul 11, 22:50 UTCJul 11, 23:15 UTC25m
2026-07-11 TKR873 - Jul 11, 22:05 UTCJul 11, 22:40 UTC35m
2026-07-11 TKR873 - Jul 11, 20:30 UTCJul 11, 21:55 UTC1h 25m
2026-07-11 TKR873 - Jul 11, 19:45 UTCJul 11, 20:20 UTC35m
2026-07-11 TKR873 - Jul 11, 18:15 UTCJul 11, 18:45 UTC30m
2026-07-11 TKR873 - Jul 11, 17:35 UTCJul 11, 18:10 UTC35m
2026-07-11 TKR873 - Jul 11, 16:10 UTCJul 11, 17:25 UTC1h 15m
2026-07-11 TKR873 - Jul 11, 15:25 UTCJul 11, 16:00 UTC35m
2026-07-11 TKR873 - Jul 11, 02:10 UTCJul 11, 02:30 UTC20m
2026-07-11 TKR873 - Jul 11, 01:30 UTCJul 11, 02:00 UTC30m
2026-07-11 TKR873 - Jul 11, 00:00 UTCJul 11, 01:20 UTC1h 20m
2026-07-10 TKR873 - Jul 10, 01:25 UTCJul 10, 01:45 UTC20m
2026-07-09 TKR873 - Jul 9, 18:45 UTCJul 9, 19:10 UTC25m
2026-07-04 TKR873 - Jul 4, 01:55 UTCJul 4, 02:05 UTC10m
2026-07-04 TKR873 - Jul 4, 00:55 UTCJul 4, 01:15 UTC20m
2026-07-02 TKR873 - Jul 2, 00:25 UTCJul 2, 00:45 UTC20m
2026-07-01 TKR873 - Jul 1, 23:35 UTCJul 1, 23:50 UTC15m
2026-06-30 TKR873 - Jun 30, 01:19 UTCJun 30, 01:30 UTC11m
2026-06-30 TKR873 - Jun 30, 00:14 UTCJun 30, 00:30 UTC15m
2026-06-28 TKR873 - Jun 28, 01:19 UTCJun 28, 01:59 UTC40m
2026-06-28 TKR873 - Jun 28, 00:09 UTCJun 28, 01:15 UTC1h 5m
2026-06-27 TKR873 - Jun 27, 20:44 UTCJun 27, 21:19 UTC35m
2026-06-27 TKR873 - Jun 27, 19:15 UTCJun 27, 19:49 UTC35m
2026-06-27 TKR873 - Jun 27, 18:09 UTCJun 27, 19:05 UTC55m

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 N173TA page for operator, model, and routing details .

Mode-S A125FC frequently asked

What is Mode-S code A125FC?
A125FC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N173TA.
Where is Mode-S A125FC registered?
Mode-S code A125FC 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 A125FC broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A125FC, octal 50222774, decimal 10,561,020.
What flights does A125FC operate?
Mode-S A125FC has broadcast 1 distinct callsign, including TKR873.