Apparatus

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sensors Mode-S transponder

A3D3B3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N346BB · operated by AMERICAN AIRLINES INC

Hex
A3D3B3
Octal
50751663
Decimal
10,736,563
Country
US
Tail
N346BB
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
775
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A3D3B3.

Country allocation

The ICAO 24-bit address A3D3B3 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
ENY4128 Envoy Air 10 2026-05-23
ENY3371 Envoy Air 9 2026-07-03
ENY4230 - 7 2026-06-20
ENY4155 Envoy Air 7 2026-04-29
ENY4120 - 7 2026-07-22
ENY4116 Envoy Air 7 2026-05-01
ENY4060 - 7 2026-06-29
ENY3967 - 7 2026-06-30
ENY3802 Envoy Air 7 2026-05-06
ENY3729 - 7 2026-07-08
ENY3392 - 7 2026-07-01
ENY4202 Envoy Air 6 2026-04-29
ENY4095 - 6 2026-07-05
ENY3986 - 6 2026-07-01
ENY3964 Envoy Air 6 2026-06-15
ENY3918 - 6 2026-07-14
ENY3915 - 6 2026-07-20
ENY3903 Envoy Air 6 2026-07-21
ENY3628 - 6 2026-07-12
ENY3504 - 6 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3834 BOS → ORD Jul 26, 22:30 UTCJul 26, 22:45 UTC15m
2026-07-26 ENY3834 BOS → ORD Jul 26, 21:20 UTCJul 26, 21:40 UTC20m
2026-07-26 ENY3836 BWI → ORD Jul 26, 15:20 UTCJul 26, 15:50 UTC30m
2026-07-26 ENY3836 BWI → ORD Jul 26, 14:05 UTCJul 26, 14:25 UTC20m
2026-07-26 ENY3664 CMH → ORD Jul 26, 10:20 UTCJul 26, 12:10 UTC1h 50m
2026-07-26 ENY3658 DFW → FWA Jul 26, 01:25 UTCJul 26, 03:20 UTC1h 55m
2026-07-25 ENY4078 DFW → CRP Jul 25, 22:55 UTCJul 26, 00:00 UTC1h 5m
2026-07-25 ENY4078 DFW → CRP Jul 25, 22:29 UTCJul 25, 23:54 UTC1h 25m
2026-07-25 ENY3637 DFW → LBB Jul 25, 20:05 UTCJul 25, 21:00 UTC55m
2026-07-25 ENY3637 DFW → LBB Jul 25, 20:00 UTCJul 25, 21:19 UTC1h 19m
2026-07-25 ENY3399 SDF → DFW Jul 25, 16:40 UTCJul 25, 18:30 UTC1h 50m
2026-07-25 ENY3399 SDF → DFW Jul 25, 13:40 UTCJul 25, 15:35 UTC1h 55m
2026-07-25 ENY4050 DFW → XNA Jul 25, 11:40 UTCJul 25, 12:20 UTC40m
2026-07-25 ENY4050 DFW → XNA Jul 25, 11:37 UTCJul 25, 12:15 UTC38m
2026-07-25 ENY3957 DCA → XNA Jul 25, 02:55 UTCJul 25, 03:20 UTC25m
2026-07-24 ENY3677 ORD → MSN Jul 24, 23:45 UTCJul 25, 00:50 UTC1h 5m
2026-07-24 ENY3677 ORD → MSN Jul 24, 23:39 UTCJul 25, 00:43 UTC1h 4m
2026-07-24 ENY3677 ORD → MSN Jul 24, 21:30 UTCJul 24, 22:35 UTC1h 5m
2026-07-24 ENY3636 RDU → ORD Jul 24, 19:15 UTCJul 24, 19:55 UTC40m
2026-07-24 ENY3636 RDU → ORD Jul 24, 17:05 UTCJul 24, 17:40 UTC35m
2026-07-24 ENY3700 PIA → ORD Jul 24, 14:40 UTCJul 24, 15:55 UTC1h 15m
2026-07-24 ENY3700 PIA → ORD Jul 24, 12:35 UTCJul 24, 13:45 UTC1h 10m
2026-07-24 ENY3830 PIT → ORD Jul 24, 01:30 UTCJul 24, 02:15 UTC45m
2026-07-23 ENY3830 PIT → ORD Jul 23, 23:55 UTCJul 24, 00:45 UTC50m
2026-07-23 ENY3966 DFW → MSY Jul 23, 15:50 UTCJul 23, 22:15 UTC6h 25m
2026-07-23 ENY4050 DFW → XNA Jul 23, 11:40 UTCJul 23, 12:15 UTC35m
2026-07-23 ENY3569 DFW → GRK Jul 23, 04:15 UTCJul 23, 04:40 UTC25m
2026-07-22 ENY3538 ORD → CMH Jul 22, 21:40 UTCJul 22, 23:35 UTC1h 55m
2026-07-22 ENY3538 ORD → CMH Jul 22, 18:40 UTCJul 22, 20:40 UTC2h 0m
2026-07-22 ENY3503 YYZ → ORD Jul 22, 15:45 UTCJul 22, 17:20 UTC1h 35m
2026-07-22 ENY3503 YYZ → ORD Jul 22, 12:50 UTCJul 22, 14:20 UTC1h 30m
2026-07-22 ENY4120 - Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 ENY4120 MLU → DFW Jul 22, 10:33 UTCJul 22, 11:25 UTC52m
2026-07-22 ENY3686 MSP → ORD Jul 22, 04:10 UTCJul 22, 04:50 UTC40m
2026-07-21 ENY3449 MIA → BWI Jul 21, 23:35 UTCJul 22, 01:45 UTC2h 10m
2026-07-21 ENY3449 MIA → BWI Jul 21, 20:20 UTCJul 21, 22:20 UTC2h 0m
2026-07-21 ENY3483 SYR → ORD Jul 21, 17:55 UTCJul 21, 19:00 UTC1h 5m
2026-07-21 ENY3483 SYR → ORD Jul 21, 17:51 UTCJul 21, 18:59 UTC1h 8m
2026-07-21 ENY3483 SYR → ORD Jul 21, 16:15 UTCJul 21, 17:05 UTC50m
2026-07-21 ENY3941 CVG → ORD Jul 21, 13:20 UTCJul 21, 14:20 UTC1h 0m
2026-07-21 ENY3903 ORD → MSN Jul 21, 01:55 UTCJul 21, 02:55 UTC1h 0m
2026-07-21 ENY3903 ORD → MSN Jul 21, 01:54 UTCJul 21, 02:54 UTC1h 0m
2026-07-20 ENY3467 IND → BOS Jul 20, 23:35 UTCJul 21, 00:15 UTC40m
2026-07-20 ENY3467 IND → BOS Jul 20, 23:34 UTCJul 21, 00:13 UTC39m
2026-07-20 ENY3467 IND → BOS Jul 20, 22:15 UTCJul 20, 22:45 UTC30m
2026-07-20 ENY3554 CVG → MIA Jul 20, 18:25 UTCJul 20, 20:30 UTC2h 5m
2026-07-20 ENY3554 CVG → MIA Jul 20, 15:10 UTCJul 20, 17:25 UTC2h 15m
2026-07-20 ENY3915 MTY → DFW Jul 20, 12:20 UTCJul 20, 13:40 UTC1h 20m
2026-07-19 ENY3756 MIA → MTY Jul 19, 23:40 UTCJul 20, 02:20 UTC2h 40m
2026-07-19 ENY3350 BDL → ORD Jul 19, 19:00 UTCJul 19, 19:20 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 N346BB page for operator, model, and routing details .

Mode-S A3D3B3 frequently asked

What is Mode-S code A3D3B3?
A3D3B3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N346BB.
Where is Mode-S A3D3B3 registered?
Mode-S code A3D3B3 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 A3D3B3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3D3B3, octal 50751663, decimal 10,736,563.
What flights does A3D3B3 operate?
Mode-S A3D3B3 has broadcast 20 distinct callsigns, including ENY4128, ENY3371, ENY4230, ENY4155, ENY4120.