Apparatus

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sensors Mode-S transponder

A37DA1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N324ES · EMBRAER ERJ-170-100 · operated by AMERICAN AIRLINES INC

Hex
A37DA1
Octal
50676641
Decimal
10,714,529
Country
US
Tail
N324ES
Type
E170
No current signal · last broadcast Jul 26, 21:55 UTC
Flights observed
723
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

Last known position

Most recent position reported by Mode-S A37DA1.

Country allocation

The ICAO 24-bit address A37DA1 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
ENY3749 Envoy Air 11 2026-06-13
ENY3523 Envoy Air 10 2026-07-23
ENY4102 - 8 2026-07-03
ENY4099 Envoy Air 7 2026-05-10
ENY3939 - 7 2026-07-13
ENY4168 Envoy Air 6 2026-05-19
ENY4166 Envoy Air 6 2026-05-15
ENY4130 Envoy Air 6 2026-05-22
ENY4074 Envoy Air 6 2026-06-13
ENY4057 - 6 2026-06-23
ENY4042 Envoy Air 6 2026-06-13
ENY3980 - 6 2026-06-16
ENY3820 - 6 2026-07-09
ENY3783 Envoy Air 6 2026-06-12
ENY3755 Envoy Air 6 2026-06-10
ENY3494 Envoy Air 6 2026-05-31
ENY3455 - 6 2026-07-07
ENY3356 Envoy Air 6 2026-05-12
ENY3337 - 6 2026-06-23
ENY4163 - 5 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3433 BRO → DFW Jul 26, 19:55 UTCJul 26, 21:55 UTC2h 0m
2026-07-26 ENY3433 BRO → DFW Jul 26, 15:50 UTCJul 26, 17:45 UTC1h 55m
2026-07-26 ENY3534 CMH → ORD Jul 26, 12:50 UTCJul 26, 14:15 UTC1h 25m
2026-07-26 ENY3534 CMH → ORD Jul 26, 12:45 UTCJul 26, 14:25 UTC1h 40m
2026-07-26 ENY4034 DCA → BOS Jul 26, 02:35 UTCJul 26, 04:20 UTC1h 45m
2026-07-25 ENY3936 CMH → ORD Jul 25, 23:10 UTCJul 26, 01:10 UTC2h 0m
2026-07-25 ENY3936 CMH → ORD Jul 25, 19:45 UTCJul 25, 22:00 UTC2h 15m
2026-07-25 ENY3478 AMA → DFW Jul 25, 17:05 UTCJul 25, 18:10 UTC1h 5m
2026-07-25 ENY3478 AMA → DFW Jul 25, 14:40 UTCJul 25, 15:55 UTC1h 15m
2026-07-25 ENY3985 DCA → GRR Jul 25, 12:25 UTCJul 25, 13:15 UTC50m
2026-07-25 ENY4105 ORD → XNA Jul 25, 00:20 UTCJul 25, 01:35 UTC1h 15m
2026-07-24 ENY3718 CMH → BOS Jul 24, 15:10 UTCJul 24, 21:55 UTC6h 45m
2026-07-24 ENY4134 - Jul 24, 11:35 UTCJul 24, 13:00 UTC1h 25m
2026-07-24 ENY3817 ORD → MSP Jul 24, 03:35 UTCJul 24, 04:45 UTC1h 10m
2026-07-24 ENY3817 ORD → MSP Jul 24, 03:31 UTCJul 24, 04:49 UTC1h 18m
2026-07-23 ENY3523 ORF → ORD Jul 23, 23:30 UTCJul 24, 00:55 UTC1h 25m
2026-07-23 ENY3523 ORF → ORD Jul 23, 21:05 UTCJul 23, 22:35 UTC1h 30m
2026-07-23 ENY3453 - Jul 23, 17:40 UTCJul 23, 19:40 UTC2h 0m
2026-07-23 ENY3453 - Jul 23, 14:45 UTCJul 23, 16:30 UTC1h 45m
2026-07-23 ENY3524 BOS → ILM Jul 23, 11:30 UTCJul 23, 12:45 UTC1h 15m
2026-07-23 ENY3456 HPN → ORD Jul 23, 02:00 UTCJul 23, 03:05 UTC1h 5m
2026-07-22 ENY3771 CVG → DFW Jul 22, 21:50 UTCJul 23, 00:00 UTC2h 10m
2026-07-22 ENY3771 CVG → DFW Jul 22, 21:45 UTCJul 22, 23:56 UTC2h 11m
2026-07-22 ENY3771 CVG → DFW Jul 22, 18:55 UTCJul 22, 20:40 UTC1h 45m
2026-07-22 ENY3981 DCA → PNS Jul 22, 15:55 UTCJul 22, 17:25 UTC1h 30m
2026-07-22 ENY3981 DCA → PNS Jul 22, 13:25 UTCJul 22, 14:35 UTC1h 10m
2026-07-22 ENY4088 XNA → ORD Jul 22, 11:25 UTCJul 22, 11:35 UTC10m
2026-07-22 ENY4088 XNA → ORD Jul 22, 10:15 UTCJul 22, 11:30 UTC1h 15m
2026-07-22 ENY4049 ORD → ABQ Jul 22, 01:50 UTCJul 22, 04:05 UTC2h 15m
2026-07-22 ENY4049 ORD → ABQ Jul 22, 01:46 UTCJul 22, 04:02 UTC2h 16m
2026-07-21 ENY3594 TPA → MIA Jul 21, 22:10 UTCJul 21, 22:50 UTC40m
2026-07-21 ENY3594 TPA → MIA Jul 21, 22:09 UTCJul 21, 22:50 UTC41m
2026-07-21 ENY3594 - Jul 21, 20:25 UTCJul 21, 21:10 UTC45m
2026-07-21 ENY4020 - Jul 21, 18:30 UTCJul 21, 18:50 UTC20m
2026-07-21 ENY4020 - Jul 21, 16:25 UTCJul 21, 16:45 UTC20m
2026-07-21 ENY3609 SJT → DFW Jul 21, 14:10 UTCJul 21, 15:05 UTC55m
2026-07-21 ENY3609 SJT → DFW Jul 21, 14:07 UTCJul 21, 15:05 UTC58m
2026-07-21 ENY3609 SJT → DFW Jul 21, 12:10 UTCJul 21, 13:00 UTC50m
2026-07-20 ENY3487 - Jul 20, 23:00 UTCJul 21, 01:05 UTC2h 5m
2026-07-20 ENY3487 CVG → MIA Jul 20, 22:59 UTCJul 21, 01:05 UTC2h 6m
2026-07-20 ENY3950 ORD → CVG Jul 20, 21:20 UTCJul 20, 22:00 UTC40m
2026-07-20 ENY3961 - Jul 20, 19:05 UTCJul 20, 20:00 UTC55m
2026-07-20 ENY3961 CMH → ORD Jul 20, 19:00 UTCJul 20, 19:53 UTC53m
2026-07-20 ENY4163 - Jul 20, 15:30 UTCJul 20, 17:40 UTC2h 10m
2026-07-20 ENY3367 FAY → DFW Jul 20, 11:00 UTCJul 20, 13:40 UTC2h 40m
2026-07-20 ENY3380 DCA → MSY Jul 20, 01:40 UTCJul 20, 04:10 UTC2h 30m
2026-07-20 ENY3380 DCA → MSY Jul 20, 01:36 UTCJul 20, 04:06 UTC2h 30m
2026-07-19 ENY3555 CVG → BOS Jul 19, 23:40 UTCJul 20, 00:20 UTC40m
2026-07-19 ENY3555 CVG → BOS Jul 19, 23:40 UTCJul 20, 00:19 UTC39m
2026-07-19 ENY3555 CVG → BOS Jul 19, 22:10 UTCJul 19, 22:50 UTC40m

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 N324ES page for operator, model, and routing details .

Mode-S A37DA1 frequently asked

What is Mode-S code A37DA1?
A37DA1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N324ES.
Where is Mode-S A37DA1 registered?
Mode-S code A37DA1 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 A37DA1 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37DA1, octal 50676641, decimal 10,714,529.
What flights does A37DA1 operate?
Mode-S A37DA1 has broadcast 20 distinct callsigns, including ENY3749, ENY3523, ENY4102, ENY4099, ENY3939.