Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A20F15

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N23134 · operated by CAREER TRACK 2 LLC

Hex
A20F15
Octal
50407425
Decimal
10,620,693
Country
US
Tail
N23134
Type
C172
No current signal · last broadcast Jul 26, 00:30 UTC
Flights observed
126
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 00:30 UTC

Last known position

Most recent position reported by Mode-S A20F15.

Country allocation

The ICAO 24-bit address A20F15 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
CXK684 - 125 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 CXK684 - Jul 25, 23:10 UTCJul 26, 00:30 UTC1h 20m
2026-07-25 CXK684 - Jul 25, 18:40 UTCJul 25, 19:25 UTC45m
2026-07-25 CXK684 - Jul 25, 17:05 UTCJul 25, 17:30 UTC25m
2026-07-25 CXK684 SGR → SGR Jul 25, 12:30 UTCJul 25, 14:05 UTC1h 35m
2026-07-25 CXK684 - Jul 25, 00:50 UTCJul 25, 01:25 UTC35m
2026-07-24 CXK684 - Jul 24, 23:00 UTCJul 24, 23:45 UTC45m
2026-07-23 CXK684 - Jul 23, 01:15 UTCJul 23, 01:30 UTC15m
2026-07-23 CXK684 - Jul 23, 00:05 UTCJul 23, 00:35 UTC30m
2026-07-22 CXK684 - Jul 22, 20:15 UTCJul 22, 20:50 UTC35m
2026-07-22 CXK684 - Jul 22, 17:50 UTCJul 22, 18:40 UTC50m
2026-07-22 CXK684 - Jul 22, 14:05 UTCJul 22, 15:40 UTC1h 35m
2026-07-21 CXK684 - Jul 21, 22:05 UTCJul 21, 23:25 UTC1h 20m
2026-07-21 CXK684 SGR → SGR Jul 21, 15:30 UTCJul 21, 16:25 UTC55m
2026-07-21 CXK684 - Jul 21, 00:00 UTCJul 21, 00:40 UTC40m
2026-07-20 CXK684 - Jul 20, 23:15 UTCJul 20, 23:25 UTC10m
2026-07-20 CXK684 - Jul 20, 19:15 UTCJul 20, 20:40 UTC1h 25m
2026-07-20 CXK684 - Jul 20, 16:35 UTCJul 20, 17:25 UTC50m
2026-07-20 CXK684 SGR → SGR Jul 20, 00:00 UTCJul 20, 01:05 UTC1h 5m
2026-07-19 CXK684 SGR → SGR Jul 19, 11:15 UTCJul 19, 12:15 UTC1h 0m
2026-07-18 CXK684 - Jul 18, 22:00 UTCJul 18, 23:15 UTC1h 15m
2026-07-18 CXK684 - Jul 18, 20:05 UTCJul 18, 20:40 UTC35m
2026-07-18 CXK684 SGR → SGR Jul 18, 18:40 UTCJul 18, 19:20 UTC40m
2026-07-18 CXK684 - Jul 18, 02:29 UTCJul 18, 04:00 UTC1h 31m
2026-07-17 CXK684 - Jul 17, 23:30 UTCJul 18, 01:10 UTC1h 40m
2026-07-17 CXK684 - Jul 17, 21:39 UTCJul 17, 22:25 UTC45m
2026-07-17 CXK684 CLL → SGR Jul 17, 18:29 UTCJul 17, 19:20 UTC50m
2026-07-17 CXK684 - Jul 17, 16:24 UTCJul 17, 17:09 UTC45m
2026-07-17 CXK684 SGR → SGR Jul 17, 14:04 UTCJul 17, 14:50 UTC45m
2026-07-16 CXK684 - Jul 16, 18:55 UTCJul 16, 19:40 UTC45m
2026-07-16 CXK684 SGR → SGR Jul 16, 16:55 UTCJul 16, 17:40 UTC45m
2026-07-16 CXK684 - Jul 16, 14:15 UTCJul 16, 15:49 UTC1h 35m
2026-07-16 CXK684 - Jul 16, 00:05 UTCJul 16, 01:20 UTC1h 15m
2026-07-15 CXK684 - Jul 15, 21:45 UTCJul 15, 22:55 UTC1h 10m
2026-07-15 CXK684 SGR → SGR Jul 15, 19:25 UTCJul 15, 20:50 UTC1h 25m
2026-07-15 CXK684 - Jul 15, 13:45 UTCJul 15, 14:05 UTC20m
2026-07-15 CXK684 SGR → SGR Jul 15, 11:30 UTCJul 15, 12:50 UTC1h 20m
2026-07-14 CXK684 - Jul 14, 22:50 UTCJul 15, 00:15 UTC1h 25m
2026-07-14 CXK684 - Jul 14, 20:45 UTCJul 14, 21:50 UTC1h 5m
2026-07-13 CXK684 SGR → SGR Jul 13, 14:40 UTCJul 13, 14:50 UTC10m
2026-07-11 CXK684 - Jul 11, 14:15 UTCJul 11, 15:35 UTC1h 20m
2026-07-10 CXK684 - Jul 10, 14:05 UTCJul 10, 15:10 UTC1h 5m
2026-07-09 CXK684 - Jul 9, 22:20 UTCJul 9, 23:30 UTC1h 10m
2026-07-09 CXK684 - Jul 9, 19:55 UTCJul 9, 20:40 UTC45m
2026-07-09 CXK684 - Jul 9, 13:35 UTCJul 9, 16:00 UTC2h 25m
2026-07-09 CXK684 SGR → SGR Jul 9, 12:15 UTCJul 9, 12:35 UTC20m
2026-07-07 CXK684 - Jul 7, 16:45 UTCJul 7, 17:05 UTC20m
2026-07-03 CXK684 SGR → SGR Jul 3, 00:10 UTCJul 3, 00:35 UTC25m
2026-07-02 CXK684 - Jul 2, 17:15 UTCJul 2, 18:05 UTC50m
2026-07-02 CXK684 - Jul 2, 15:50 UTCJul 2, 16:00 UTC10m
2026-07-02 CXK684 - Jul 2, 14:50 UTCJul 2, 15:10 UTC20m

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 N23134 page for operator, model, and routing details .

Mode-S A20F15 frequently asked

What is Mode-S code A20F15?
A20F15 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N23134.
Where is Mode-S A20F15 registered?
Mode-S code A20F15 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 A20F15 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 00:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A20F15, octal 50407425, decimal 10,620,693.
What flights does A20F15 operate?
Mode-S A20F15 has broadcast 1 distinct callsign, including CXK684.