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sensors Mode-S transponder

A915DC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N685AT · PIPER PA-44 Seminole · operated by TEXAS FLIGHT TRAINING AIRCRAFT 8 LLC

Hex
A915DC
Octal
52212734
Decimal
11,081,180
Country
US
Tail
N685AT
Type
PA44
Broadcasting now · callsign CXK1039 · 1,400 ft
Flights observed
165
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Current position

A915DC is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A915DC 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
CXK1039 - 165 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 CXK1039 MQY → MQY Jul 11, 18:35 UTCJul 11, 20:00 UTC1h 25m
2026-07-11 CXK1039 MQY → MQY Jul 11, 16:45 UTCJul 11, 17:25 UTC40m
2026-07-11 CXK1039 - Jul 11, 00:20 UTCJul 11, 00:45 UTC25m
2026-07-10 CXK1039 - Jul 10, 22:15 UTCJul 10, 22:35 UTC20m
2026-07-10 CXK1039 - Jul 10, 18:05 UTCJul 10, 18:35 UTC30m
2026-07-09 CXK1039 - Jul 9, 18:55 UTCJul 9, 20:15 UTC1h 20m
2026-07-09 CXK1039 - Jul 9, 16:35 UTCJul 9, 16:55 UTC20m
2026-07-09 CXK1039 - Jul 9, 15:40 UTCJul 9, 15:50 UTC10m
2026-07-09 CXK1039 - Jul 9, 14:25 UTCJul 9, 14:35 UTC10m
2026-07-09 CXK1039 - Jul 9, 12:45 UTCJul 9, 13:40 UTC55m
2026-07-08 CXK1039 - Jul 8, 14:05 UTCJul 8, 14:55 UTC50m
2026-07-08 CXK1039 - Jul 8, 10:35 UTCJul 8, 12:05 UTC1h 30m
2026-07-07 CXK1039 - Jul 7, 15:00 UTCJul 7, 16:35 UTC1h 35m
2026-07-06 CXK1039 - Jul 6, 20:25 UTCJul 6, 20:35 UTC10m
2026-07-06 CXK1039 - Jul 6, 18:20 UTCJul 6, 18:45 UTC25m
2026-06-30 CXK1039 - Jun 30, 13:40 UTCJun 30, 14:00 UTC20m
2026-06-29 CXK1039 - Jun 29, 20:49 UTCJun 29, 21:30 UTC40m
2026-06-29 CXK1039 - Jun 29, 18:14 UTCJun 29, 19:05 UTC50m
2026-06-28 CXK1039 - Jun 28, 19:40 UTCJun 28, 19:59 UTC20m
2026-06-28 CXK1039 - Jun 28, 18:00 UTCJun 28, 19:09 UTC1h 10m
2026-06-27 CXK1039 - Jun 27, 15:55 UTCJun 27, 16:39 UTC45m
2026-06-26 CXK1039 - Jun 26, 16:00 UTCJun 26, 16:09 UTC10m
2026-06-25 CXK1039 - Jun 25, 20:05 UTCJun 25, 20:30 UTC25m
2026-06-25 CXK1039 - Jun 25, 18:00 UTCJun 25, 18:29 UTC30m
2026-06-25 CXK1039 - Jun 25, 16:05 UTCJun 25, 16:45 UTC40m
2026-06-25 CXK1039 - Jun 25, 01:44 UTCJun 25, 02:39 UTC55m
2026-06-24 CXK1039 - Jun 24, 21:00 UTCJun 24, 21:44 UTC45m
2026-06-24 CXK1039 - Jun 24, 14:50 UTCJun 24, 15:24 UTC35m
2026-06-24 CXK1039 - Jun 24, 13:10 UTCJun 24, 13:50 UTC40m
2026-06-23 CXK1039 - Jun 23, 17:54 UTCJun 23, 19:10 UTC1h 15m
2026-06-23 CXK1039 - Jun 23, 13:05 UTCJun 23, 14:39 UTC1h 35m
2026-06-20 CXK1039 - Jun 20, 17:24 UTCJun 20, 17:49 UTC25m
2026-06-20 CXK1039 - Jun 20, 15:29 UTCJun 20, 16:29 UTC1h 0m
2026-06-20 CXK1039 - Jun 20, 13:59 UTCJun 20, 14:54 UTC55m
2026-06-20 CXK1039 - Jun 20, 10:49 UTCJun 20, 11:44 UTC55m
2026-06-18 CXK1039 - Jun 18, 15:00 UTCJun 18, 16:30 UTC1h 30m
2026-06-16 CXK1039 - Jun 16, 17:05 UTCJun 16, 17:55 UTC50m
2026-06-11 CXK1039 - Jun 11, 17:20 UTCJun 11, 18:15 UTC55m
2026-06-11 CXK1039 - Jun 11, 13:05 UTCJun 11, 14:05 UTC1h 0m
2026-06-11 CXK1039 - Jun 11, 02:25 UTCJun 11, 03:55 UTC1h 30m
2026-06-11 CXK1039 - Jun 11, 00:10 UTCJun 11, 01:30 UTC1h 20m
2026-06-10 CXK1039 - Jun 10, 21:35 UTCJun 10, 23:00 UTC1h 25m
2026-06-10 CXK1039 - Jun 10, 18:10 UTCJun 10, 20:10 UTC2h 0m
2026-06-10 CXK1039 - Jun 10, 17:10 UTCJun 10, 17:30 UTC20m
2026-06-10 CXK1039 - Jun 10, 15:15 UTCJun 10, 16:30 UTC1h 15m
2026-06-10 CXK1039 - Jun 10, 14:05 UTCJun 10, 14:25 UTC20m
2026-06-06 CXK1039 - Jun 6, 21:09 UTCJun 6, 22:50 UTC1h 40m
2026-06-05 CXK1039 - Jun 5, 21:55 UTCJun 5, 22:10 UTC15m
2026-06-05 CXK1039 - Jun 5, 21:05 UTCJun 5, 21:20 UTC15m
2026-06-05 CXK1039 - Jun 5, 18:10 UTCJun 5, 19:00 UTC50m

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 N685AT page for operator, model, and routing details .

Mode-S A915DC frequently asked

What is Mode-S code A915DC?
A915DC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N685AT.
Where is Mode-S A915DC registered?
Mode-S code A915DC 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 A915DC broadcasting right now?
Yes. Mode-S A915DC is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A915DC, octal 52212734, decimal 11,081,180.
What flights does A915DC operate?
Mode-S A915DC has broadcast 1 distinct callsign, including CXK1039.