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 2h ago
Flights observed
89
Distinct callsigns
1
Country
US
Last broadcast
2h 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 - 89 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-08 VAR685 SBD → GYR Jun 8, 01:15 UTCJun 8, 03:10 UTC1h 55m
2026-06-07 VAR685 GYR → SBD Jun 7, 21:55 UTCJun 8, 00:00 UTC2h 5m
2026-06-07 VAR685 GYR → GYR Jun 7, 17:05 UTCJun 7, 18:10 UTC1h 5m
2026-06-06 VAR685 GYR → GYR Jun 6, 16:50 UTCJun 6, 18:50 UTC2h 0m
2026-06-06 VAR685 GYR → GYR Jun 6, 03:55 UTCJun 6, 06:25 UTC2h 30m
2026-06-05 VAR685 GYR → GYR Jun 5, 16:25 UTCJun 5, 18:05 UTC1h 40m
2026-06-05 VAR685 GYR → GYR Jun 5, 00:00 UTCJun 5, 01:20 UTC1h 20m
2026-06-04 VAR685 GYR → GYR Jun 4, 19:15 UTCJun 4, 20:45 UTC1h 30m
2026-06-04 VAR685 GYR → GYR Jun 4, 15:45 UTCJun 4, 16:45 UTC1h 0m
2026-06-04 VAR685 GYR → GYR Jun 4, 13:25 UTCJun 4, 14:30 UTC1h 5m
2026-06-03 VAR685 GYR → GYR Jun 3, 22:25 UTCJun 3, 23:50 UTC1h 25m
2026-06-03 VAR685 GYR → GYR Jun 3, 16:45 UTCJun 3, 18:10 UTC1h 25m
2026-06-02 VAR685 GYR → GYR Jun 2, 15:20 UTCJun 2, 17:25 UTC2h 5m
2026-06-01 VAR685 GYR → GYR Jun 1, 22:50 UTCJun 2, 00:30 UTC1h 40m
2026-06-01 VAR685 GYR → GYR Jun 1, 16:40 UTCJun 1, 17:40 UTC1h 0m
2026-06-01 VAR685 - Jun 1, 12:50 UTCJun 1, 14:20 UTC1h 30m
2026-05-31 VAR685 GYR → GYR May 31, 16:25 UTCMay 31, 18:25 UTC2h 0m
2026-05-28 VAR685 GYR → GYR May 28, 20:20 UTCMay 28, 22:20 UTC2h 0m
2026-05-28 VAR685 GYR → GYR May 28, 18:20 UTCMay 28, 19:40 UTC1h 20m
2026-05-28 VAR685 GYR → GYR May 28, 01:30 UTCMay 28, 03:00 UTC1h 30m
2026-05-27 VAR685 GYR → GYR May 27, 19:55 UTCMay 27, 21:40 UTC1h 45m
2026-05-27 VAR685 GYR → GYR May 27, 16:25 UTCMay 27, 17:45 UTC1h 20m
2026-05-27 VAR685 GYR → GYR May 27, 12:35 UTCMay 27, 14:40 UTC2h 5m
2026-05-22 VAR685 GYR → GYR May 22, 19:30 UTCMay 22, 20:50 UTC1h 20m
2026-05-22 VAR685 GYR → GYR May 22, 16:10 UTCMay 22, 18:00 UTC1h 50m
2026-05-22 VAR685 - May 22, 04:45 UTCMay 22, 05:35 UTC50m
2026-05-22 VAR685 - May 22, 03:10 UTCMay 22, 03:55 UTC45m
2026-05-21 VAR685 GYR → GYR May 21, 23:05 UTCMay 22, 00:10 UTC1h 5m
2026-05-21 VAR685 GYR → GYR May 21, 18:05 UTCMay 21, 19:40 UTC1h 35m
2026-05-21 VAR685 GYR → GYR May 21, 14:55 UTCMay 21, 16:50 UTC1h 55m
2026-05-20 VAR685 GYR → GYR May 20, 22:10 UTCMay 21, 00:35 UTC2h 25m
2026-05-20 VAR685 GYR → GYR May 20, 18:00 UTCMay 20, 19:05 UTC1h 5m
2026-05-20 VAR685 GYR → GYR May 20, 14:50 UTCMay 20, 16:20 UTC1h 30m
2026-05-19 VAR685 GYR → GYR May 19, 22:10 UTCMay 19, 23:25 UTC1h 15m
2026-05-19 VAR685 GYR → GYR May 19, 14:40 UTCMay 19, 14:50 UTC10m
2026-05-19 VAR685 GYR → GYR May 19, 00:25 UTCMay 19, 02:15 UTC1h 50m
2026-05-18 VAR685 GYR → GYR May 18, 18:10 UTCMay 18, 20:55 UTC2h 44m
2026-05-17 VAR685 - May 17, 22:15 UTCMay 17, 23:15 UTC1h 0m
2026-05-17 VAR685 GYR → GYR May 17, 18:25 UTCMay 17, 19:40 UTC1h 15m
2026-05-17 VAR685 GYR → GYR May 17, 14:01 UTCMay 17, 16:01 UTC2h 0m
2026-05-17 VAR685 - May 17, 03:50 UTCMay 17, 05:25 UTC1h 35m
2026-05-17 VAR685 - May 17, 01:25 UTCMay 17, 03:05 UTC1h 40m
2026-05-16 VAR685 GYR → GYR May 16, 18:40 UTCMay 16, 21:05 UTC2h 25m
2026-05-16 VAR685 GYR → GYR May 16, 14:41 UTCMay 16, 16:00 UTC1h 20m
2026-05-14 VAR685 GYR → GYR May 14, 00:05 UTCMay 14, 00:10 UTC5m
2026-05-13 VAR685 GYR → GYR May 13, 21:25 UTCMay 13, 23:05 UTC1h 40m
2026-05-13 VAR685 - May 13, 16:20 UTCMay 13, 17:45 UTC1h 25m
2026-05-13 VAR685 GYR → GYR May 13, 13:45 UTCMay 13, 15:15 UTC1h 30m
2026-05-09 VAR685 - May 9, 03:10 UTCMay 9, 05:40 UTC2h 30m
2026-05-08 VAR685 - May 8, 23:35 UTCMay 9, 02:15 UTC2h 40m

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 2h 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.