Apparatus

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sensors Mode-S transponder

A915DE

ICAO 24-bit transponder address · allocated to United States

Hex
A915DE
Octal
52212736
Decimal
11,081,182
Country
US
No current signal · last broadcast 12h ago
Flights observed
155
Distinct callsigns
1
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A915DE.

Country allocation

The ICAO 24-bit address A915DE 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
VAR685 - 155 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 VAR685 GYR → GYR Jul 22, 20:35 UTCJul 22, 22:25 UTC1h 50m
2026-07-22 VAR685 GYR → GYR Jul 22, 16:20 UTCJul 22, 18:15 UTC1h 55m
2026-07-22 VAR685 GYR → GYR Jul 22, 13:10 UTCJul 22, 15:25 UTC2h 15m
2026-07-17 VAR685 GYR → GYR Jul 17, 22:45 UTCJul 18, 00:25 UTC1h 40m
2026-07-15 VAR685 GYR → GYR Jul 15, 20:50 UTCJul 15, 22:15 UTC1h 25m
2026-07-15 VAR685 GYR → GYR Jul 15, 17:10 UTCJul 15, 18:50 UTC1h 40m
2026-07-15 VAR685 - Jul 15, 15:30 UTCJul 15, 16:10 UTC40m
2026-07-15 VAR685 - Jul 15, 12:45 UTCJul 15, 13:30 UTC45m
2026-07-14 VAR685 GYR → GYR Jul 14, 16:30 UTCJul 14, 17:50 UTC1h 20m
2026-07-11 VAR685 - Jul 11, 23:55 UTCJul 12, 02:05 UTC2h 10m
2026-07-11 VAR685 - Jul 11, 19:50 UTCJul 11, 20:40 UTC50m
2026-07-10 VAR685 GYR → GYR Jul 10, 21:15 UTCJul 10, 23:05 UTC1h 50m
2026-07-10 VAR685 GYR → GYR Jul 10, 17:40 UTCJul 10, 17:50 UTC10m
2026-07-09 VAR685 GYR → GYR Jul 9, 22:40 UTCJul 10, 00:30 UTC1h 50m
2026-07-09 VAR685 GYR → GYR Jul 9, 13:00 UTCJul 9, 15:30 UTC2h 30m
2026-07-08 VAR685 GYR → GYR Jul 8, 15:55 UTCJul 8, 17:30 UTC1h 35m
2026-07-07 VAR685 - Jul 7, 23:10 UTCJul 8, 00:10 UTC1h 0m
2026-07-07 VAR685 - Jul 7, 18:50 UTCJul 7, 19:10 UTC20m
2026-07-07 VAR685 - Jul 7, 17:40 UTCJul 7, 18:00 UTC20m
2026-07-07 VAR685 GYR → GYR Jul 7, 14:45 UTCJul 7, 16:30 UTC1h 45m
2026-07-06 VAR685 GYR → GYR Jul 6, 22:15 UTCJul 7, 00:15 UTC2h 0m
2026-07-05 VAR685 - Jul 5, 23:25 UTCJul 6, 00:40 UTC1h 15m
2026-07-05 VAR685 - Jul 5, 21:35 UTCJul 5, 22:45 UTC1h 10m
2026-07-05 VAR685 GYR → HII Jul 5, 19:40 UTCJul 5, 20:45 UTC1h 5m
2026-07-05 VAR685 GYR → GYR Jul 5, 16:05 UTCJul 5, 18:25 UTC2h 20m
2026-07-03 VAR685 GYR → GYR Jul 3, 16:55 UTCJul 3, 18:25 UTC1h 30m
2026-07-03 VAR685 GYR → GYR Jul 3, 13:55 UTCJul 3, 15:45 UTC1h 50m
2026-07-02 VAR685 - Jul 2, 19:45 UTCJul 2, 20:50 UTC1h 5m
2026-07-02 VAR685 - Jul 2, 15:25 UTCJul 2, 16:40 UTC1h 15m
2026-06-30 VAR685 GYR → GYR Jun 30, 21:00 UTCJun 30, 22:45 UTC1h 45m
2026-06-30 VAR685 - Jun 30, 16:25 UTCJun 30, 17:15 UTC50m
2026-06-29 VAR685 GYR → GYR Jun 29, 22:30 UTCJun 30, 00:04 UTC1h 35m
2026-06-29 VAR685 - Jun 29, 20:19 UTCJun 29, 20:35 UTC15m
2026-06-29 VAR685 - Jun 29, 18:30 UTCJun 29, 19:49 UTC1h 20m
2026-06-29 VAR685 - Jun 29, 15:24 UTCJun 29, 17:19 UTC1h 55m
2026-06-29 VAR685 GYR → GYR Jun 29, 03:44 UTCJun 29, 05:54 UTC2h 10m
2026-06-28 VAR685 GYR → GYR Jun 28, 17:10 UTCJun 28, 19:04 UTC1h 55m
2026-06-27 VAR685 GYR → GYR Jun 27, 16:39 UTCJun 27, 19:09 UTC2h 30m
2026-06-25 VAR685 GYR → GYR Jun 25, 22:24 UTCJun 25, 23:14 UTC50m
2026-06-25 VAR685 GYR → GYR Jun 25, 16:35 UTCJun 25, 18:45 UTC2h 10m
2026-06-25 VAR685 GYR → GYR Jun 25, 13:40 UTCJun 25, 14:24 UTC45m
2026-06-25 VAR685 GYR → GYR Jun 25, 03:44 UTCJun 25, 06:00 UTC2h 15m
2026-06-24 VAR685 GYR → GYR Jun 24, 22:25 UTCJun 24, 23:45 UTC1h 20m
2026-06-24 VAR685 BXK → GYR Jun 24, 19:10 UTCJun 24, 20:24 UTC1h 15m
2026-06-24 VAR685 GYR → BXK Jun 24, 18:50 UTCJun 24, 19:04 UTC15m
2026-06-24 VAR685 GYR → GYR Jun 24, 13:05 UTCJun 24, 15:05 UTC2h 0m
2026-06-23 VAR685 - Jun 23, 18:10 UTCJun 23, 20:54 UTC2h 45m
2026-06-23 VAR685 GYR → GYR Jun 23, 14:49 UTCJun 23, 16:29 UTC1h 40m
2026-06-23 VAR685 GYR → GYR Jun 23, 00:54 UTCJun 23, 02:24 UTC1h 30m
2026-06-22 VAR685 GYR → GYR Jun 22, 21:00 UTCJun 22, 23:10 UTC2h 10m

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.

Mode-S A915DE frequently asked

What is Mode-S code A915DE?
A915DE is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A915DE registered?
Mode-S code A915DE 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 A915DE broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A915DE, octal 52212736, decimal 11,081,182.
What flights does A915DE operate?
Mode-S A915DE has broadcast 1 distinct callsign, including VAR685.