Apparatus

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sensors Mode-S transponder

A3D829

ICAO 24-bit transponder address · allocated to United States

Hex
A3D829
Octal
50754051
Decimal
10,737,705
Country
US
No current signal · last broadcast 25d ago
Flights observed
175
Distinct callsigns
20
Country
US
Last broadcast
25d ago

Last known position

Most recent position reported by Mode-S A3D829.

Country allocation

The ICAO 24-bit address A3D829 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 20 distinct

Callsign Airline Flights Last seen
ENY3778 Envoy Air 6 2026-07-19
ENY3506 - 6 2026-07-05
ENY3683 Envoy Air 4 2026-07-26
ENY3602 Envoy Air 4 2026-07-26
ENY4145 - 3 2026-07-20
ENY4060 - 3 2026-07-08
ENY3977 Envoy Air 3 2026-07-23
ENY3967 Envoy Air 3 2026-07-22
ENY3883 - 3 2026-07-06
ENY3727 Envoy Air 3 2026-07-22
ENY3721 - 3 2026-07-06
ENY3708 - 3 2026-07-06
ENY3700 Envoy Air 3 2026-07-22
ENY3677 Envoy Air 3 2026-07-24
ENY3652 - 3 2026-07-02
ENY3642 Envoy Air 3 2026-07-25
ENY3636 - 3 2026-07-04
ENY3580 Envoy Air 3 2026-07-21
ENY3470 - 3 2026-07-12
ENY3443 Envoy Air 3 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3602 ORD → AUS Jul 26, 21:45 UTCJul 26, 22:15 UTC30m
2026-07-26 ENY3602 ORD → AUS Jul 26, 18:45 UTCJul 26, 20:30 UTC1h 45m
2026-07-26 ENY3683 RDU → ORD Jul 26, 15:55 UTCJul 26, 17:20 UTC1h 25m
2026-07-26 ENY3683 RDU → ORD Jul 26, 13:20 UTCJul 26, 14:25 UTC1h 5m
2026-07-26 ENY4107 FAR → ORD Jul 26, 10:05 UTCJul 26, 11:25 UTC1h 20m
2026-07-26 ENY3450 SDF → BOS Jul 26, 02:30 UTCJul 26, 04:45 UTC2h 15m
2026-07-25 ENY3603 ORD → CVG Jul 25, 23:10 UTCJul 26, 00:05 UTC55m
2026-07-25 ENY3603 ORD → CVG Jul 25, 20:35 UTCJul 25, 21:20 UTC45m
2026-07-25 ENY3526 DFW → SAT Jul 25, 17:00 UTCJul 25, 19:05 UTC2h 5m
2026-07-25 ENY3526 DFW → SAT Jul 25, 13:55 UTCJul 25, 16:10 UTC2h 15m
2026-07-25 ENY4179 DTW → DFW Jul 25, 11:40 UTCJul 25, 12:20 UTC40m
2026-07-25 ENY3537 DFW → FSM Jul 25, 04:05 UTCJul 25, 04:40 UTC35m
2026-07-25 ENY3642 DFW → LIT Jul 25, 01:30 UTCJul 25, 02:35 UTC1h 5m
2026-07-25 ENY3642 DFW → LIT Jul 25, 01:28 UTCJul 25, 02:32 UTC1h 4m
2026-07-24 ENY3642 DFW → LIT Jul 24, 23:30 UTCJul 25, 00:25 UTC55m
2026-07-24 ENY3387 MSY → MIA Jul 24, 21:35 UTCJul 24, 22:20 UTC45m
2026-07-24 ENY3387 MSY → MIA Jul 24, 19:45 UTCJul 24, 20:25 UTC40m
2026-07-24 ENY3661 DFW → SGF Jul 24, 17:30 UTCJul 24, 18:35 UTC1h 5m
2026-07-24 ENY3661 DFW → SGF Jul 24, 15:05 UTCJul 24, 16:15 UTC1h 10m
2026-07-24 ENY4168 CRP → DFW Jul 24, 12:55 UTCJul 24, 14:00 UTC1h 5m
2026-07-24 ENY4173 DFW → CRP Jul 24, 02:20 UTCJul 24, 03:15 UTC55m
2026-07-24 ENY3677 ORD → MSN Jul 24, 00:00 UTCJul 24, 01:20 UTC1h 20m
2026-07-23 ENY3677 ORD → MSN Jul 23, 23:58 UTCJul 24, 01:04 UTC1h 6m
2026-07-23 ENY3677 ORD → MSN Jul 23, 21:45 UTCJul 23, 22:45 UTC1h 0m
2026-07-23 ENY3977 DFW → STS Jul 23, 18:05 UTCJul 23, 20:10 UTC2h 5m
2026-07-23 ENY3977 DFW → STS Jul 23, 18:02 UTCJul 23, 20:01 UTC1h 59m
2026-07-23 ENY3977 DFW → STS Jul 23, 14:55 UTCJul 23, 17:00 UTC2h 5m
2026-07-23 ENY3737 SBP → PHX Jul 23, 13:25 UTCJul 23, 14:00 UTC35m
2026-07-23 ENY3611 ILM → BOS Jul 23, 02:40 UTCJul 23, 03:00 UTC20m
2026-07-22 ENY3443 BOS → CMH Jul 22, 23:45 UTCJul 23, 01:00 UTC1h 15m
2026-07-22 ENY3443 BOS → CMH Jul 22, 21:40 UTCJul 22, 22:40 UTC1h 0m
2026-07-22 ENY3967 DFW → DGO Jul 22, 19:25 UTCJul 22, 20:15 UTC50m
2026-07-22 ENY3967 DFW → DGO Jul 22, 19:22 UTCJul 22, 20:19 UTC57m
2026-07-22 ENY3967 DFW → DGO Jul 22, 17:35 UTCJul 22, 18:35 UTC1h 0m
2026-07-22 ENY3700 PIA → ORD Jul 22, 14:35 UTCJul 22, 15:45 UTC1h 10m
2026-07-22 ENY3700 PIA → ORD Jul 22, 14:31 UTCJul 22, 15:44 UTC1h 13m
2026-07-22 ENY3700 PIA → ORD Jul 22, 12:35 UTCJul 22, 13:45 UTC1h 10m
2026-07-22 ENY3349 STS → PHX Jul 22, 03:55 UTCJul 22, 04:10 UTC15m
2026-07-22 ENY3349 STS → PHX Jul 22, 03:52 UTCJul 22, 04:09 UTC17m
2026-07-22 ENY3727 CMH → BOS Jul 22, 01:40 UTCJul 22, 02:15 UTC35m
2026-07-22 ENY3727 CMH → BOS Jul 22, 01:35 UTCJul 22, 02:10 UTC35m
2026-07-21 ENY3727 CMH → BOS Jul 21, 23:45 UTCJul 22, 00:25 UTC40m
2026-07-21 ENY3580 MSY → DCA Jul 21, 20:55 UTCJul 21, 22:15 UTC1h 20m
2026-07-21 ENY3580 MSY → DCA Jul 21, 20:51 UTCJul 21, 22:14 UTC1h 23m
2026-07-21 ENY3580 MSY → DCA Jul 21, 18:25 UTCJul 21, 19:55 UTC1h 30m
2026-07-21 ENY3576 ORD → FAR Jul 21, 15:50 UTCJul 21, 17:00 UTC1h 10m
2026-07-21 ENY3576 ORD → FAR Jul 21, 13:55 UTCJul 21, 15:00 UTC1h 5m
2026-07-21 ENY3885 CRP → DFW Jul 21, 11:05 UTCJul 21, 12:10 UTC1h 5m
2026-07-21 ENY3885 CRP → DFW Jul 21, 11:04 UTCJul 21, 12:05 UTC1h 1m
2026-07-21 ENY4065 DFW → CRP Jul 21, 03:55 UTCJul 21, 04:45 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.

Mode-S A3D829 frequently asked

What is Mode-S code A3D829?
A3D829 is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A3D829 registered?
Mode-S code A3D829 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 A3D829 broadcasting right now?
No active broadcast right now. Last signal was 25d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3D829, octal 50754051, decimal 10,737,705.
What flights does A3D829 operate?
Mode-S A3D829 has broadcast 20 distinct callsigns, including ENY3778, ENY3506, ENY3683, ENY3602, ENY4145.