Apparatus

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sensors Mode-S transponder

A1CD4E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N215NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A1CD4E
Octal
50346516
Decimal
10,603,854
Country
US
Tail
N215NN
Type
E75L
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
732
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A1CD4E.

Country allocation

The ICAO 24-bit address A1CD4E 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
ENY4080 Envoy Air 10 2026-06-10
ENY4142 Envoy Air 7 2026-06-06
ENY4091 - 7 2026-06-30
ENY3510 - 7 2026-07-04
ENY3464 - 7 2026-06-30
ENY4086 Envoy Air 6 2026-06-10
ENY4084 - 6 2026-07-12
ENY3884 Envoy Air 6 2026-07-25
ENY3784 - 6 2026-07-01
ENY3780 Envoy Air 6 2026-07-04
ENY3726 Envoy Air 6 2026-07-03
ENY3678 - 6 2026-06-20
ENY3449 - 6 2026-07-06
ENY3415 Envoy Air 6 2026-06-01
ENY3336 Envoy Air 6 2026-07-26
ENY4214 Envoy Air 5 2026-07-20
ENY4130 Envoy Air 5 2026-06-06
ENY4023 Envoy Air 5 2026-05-29
ENY4010 - 5 2026-06-24
ENY3825 Envoy Air 5 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3336 SBA → PHX Jul 26, 19:10 UTCJul 26, 21:30 UTC2h 20m
2026-07-26 ENY3515 DFW → MTY Jul 26, 15:40 UTCJul 26, 16:05 UTC25m
2026-07-26 ENY3515 DFW → MTY Jul 26, 14:15 UTCJul 26, 14:35 UTC20m
2026-07-26 ENY3638 CVG → MIA Jul 26, 10:55 UTCJul 26, 13:20 UTC2h 25m
2026-07-26 ENY4115 DFW → CVG Jul 26, 00:25 UTCJul 26, 02:45 UTC2h 20m
2026-07-26 ENY4115 DFW → CVG Jul 26, 00:20 UTCJul 26, 02:44 UTC2h 24m
2026-07-25 ENY3884 SDF → DFW Jul 25, 22:40 UTCJul 25, 23:00 UTC20m
2026-07-25 ENY3884 SDF → DFW Jul 25, 22:13 UTCJul 25, 22:59 UTC46m
2026-07-25 ENY3884 SDF → DFW Jul 25, 20:30 UTCJul 25, 20:55 UTC25m
2026-07-25 ENY4007 BTR → DCA Jul 25, 18:30 UTCJul 25, 19:10 UTC40m
2026-07-25 ENY4007 BTR → DCA Jul 25, 17:31 UTCJul 25, 19:08 UTC1h 37m
2026-07-25 ENY4007 BTR → DCA Jul 25, 15:30 UTCJul 25, 15:50 UTC20m
2026-07-25 ENY4052 MIA → MCI Jul 25, 11:15 UTCJul 25, 13:30 UTC2h 15m
2026-07-25 ENY4049 ORD → ABQ Jul 25, 01:35 UTCJul 25, 04:00 UTC2h 25m
2026-07-24 ENY3629 MIA → AZS Jul 24, 22:55 UTCJul 25, 00:25 UTC1h 30m
2026-07-24 ENY3629 MIA → AZS Jul 24, 22:50 UTCJul 25, 00:24 UTC1h 34m
2026-07-24 ENY3629 MIA → AZS Jul 24, 20:30 UTCJul 24, 22:05 UTC1h 35m
2026-07-24 ENY4007 BTR → DCA Jul 24, 14:55 UTCJul 24, 18:30 UTC3h 35m
2026-07-24 ENY3667 CMH → MIA Jul 24, 11:20 UTCJul 24, 13:25 UTC2h 5m
2026-07-24 ENY3660 MLI → ORD Jul 24, 00:15 UTCJul 24, 02:25 UTC2h 10m
2026-07-23 ENY3350 BDL → ORD Jul 23, 19:55 UTCJul 23, 22:10 UTC2h 15m
2026-07-23 ENY3989 ORD → CVG Jul 23, 17:35 UTCJul 23, 17:55 UTC20m
2026-07-23 ENY3989 ORD → CVG Jul 23, 15:35 UTCJul 23, 15:55 UTC20m
2026-07-23 ENY3679 - Jul 23, 11:25 UTCJul 23, 14:00 UTC2h 35m
2026-07-23 ENY3680 ORD → MSN Jul 23, 01:25 UTCJul 23, 04:05 UTC2h 40m
2026-07-22 ENY3420 DFW → MAF Jul 22, 21:10 UTCJul 22, 23:25 UTC2h 15m
2026-07-22 ENY3420 DFW → MAF Jul 22, 20:50 UTCJul 22, 23:25 UTC2h 35m
2026-07-22 ENY4317 PHX → GRB Jul 22, 17:20 UTCJul 22, 19:40 UTC2h 20m
2026-07-22 ENY4317 PHX → GRB Jul 22, 17:18 UTCJul 22, 19:52 UTC2h 34m
2026-07-22 ENY3515 DFW → MTY Jul 22, 15:40 UTCJul 22, 16:00 UTC20m
2026-07-22 ENY3515 DFW → MTY Jul 22, 15:33 UTCJul 22, 15:59 UTC26m
2026-07-22 ENY3515 DFW → MTY Jul 22, 14:00 UTCJul 22, 14:20 UTC20m
2026-07-22 ENY4301 - Jul 22, 11:20 UTCJul 22, 12:20 UTC1h 0m
2026-07-22 ENY4300 MSY → DFW Jul 22, 04:00 UTCJul 22, 05:10 UTC1h 10m
2026-07-22 ENY4300 MSY → DFW Jul 22, 03:59 UTCJul 22, 05:17 UTC1h 18m
2026-07-21 ENY4057 MEM → DCA Jul 21, 23:40 UTCJul 22, 03:15 UTC3h 35m
2026-07-21 ENY4057 MEM → DCA Jul 21, 19:50 UTCJul 21, 22:50 UTC3h 0m
2026-07-21 ENY3679 OKC → MIA Jul 21, 11:25 UTCJul 21, 14:15 UTC2h 50m
2026-07-21 ENY3680 ORD → MSN Jul 21, 02:25 UTCJul 21, 05:10 UTC2h 45m
2026-07-20 ENY4074 - Jul 20, 21:05 UTCJul 20, 23:20 UTC2h 15m
2026-07-20 ENY3336 SBA → PHX Jul 20, 17:40 UTCJul 20, 19:45 UTC2h 5m
2026-07-20 ENY4214 ORD → BOS Jul 20, 16:15 UTCJul 20, 16:40 UTC25m
2026-07-20 ENY4214 ORD → BOS Jul 20, 14:10 UTCJul 20, 14:30 UTC20m
2026-07-20 ENY3492 - Jul 20, 12:10 UTCJul 20, 13:05 UTC55m
2026-07-20 ENY3893 - Jul 20, 00:30 UTCJul 20, 01:20 UTC50m
2026-07-20 ENY3893 MIA → JAX Jul 20, 00:29 UTCJul 20, 01:19 UTC50m
2026-07-19 ENY3884 SDF → DFW Jul 19, 21:25 UTCJul 19, 21:45 UTC20m
2026-07-19 ENY3884 SDF → DFW Jul 19, 20:52 UTCJul 19, 21:44 UTC52m
2026-07-19 ENY3884 SDF → DFW Jul 19, 19:05 UTCJul 19, 19:25 UTC20m
2026-07-19 ENY4314 BTR → DFW Jul 19, 17:25 UTCJul 19, 17:45 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 N215NN page for operator, model, and routing details .

Mode-S A1CD4E frequently asked

What is Mode-S code A1CD4E?
A1CD4E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N215NN.
Where is Mode-S A1CD4E registered?
Mode-S code A1CD4E 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 A1CD4E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1CD4E, octal 50346516, decimal 10,603,854.
What flights does A1CD4E operate?
Mode-S A1CD4E has broadcast 20 distinct callsigns, including ENY4080, ENY4142, ENY4091, ENY3510, ENY3464.