Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A1F4CD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N225NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A1F4CD
Octal
50372315
Decimal
10,613,965
Country
US
Tail
N225NN
Type
E75L
Broadcasting now · callsign ENY3961 · 9,725 ft
Flights observed
736
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Current position

A1F4CD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A1F4CD 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
ENY4084 - 10 2026-07-17
ENY4161 Envoy Air 7 2026-05-20
ENY4153 - 7 2026-07-21
ENY4114 Envoy Air 7 2026-05-09
ENY3932 Envoy Air 7 2026-07-24
ENY3701 - 7 2026-07-10
ENY3653 - 7 2026-07-06
ENY3539 - 7 2026-07-02
ENY4144 - 6 2026-07-20
ENY4130 - 6 2026-07-02
ENY3956 - 6 2026-06-30
ENY3870 - 6 2026-07-14
ENY3776 - 6 2026-07-05
ENY3689 - 6 2026-07-13
ENY3468 - 6 2026-07-16
ENY4107 Envoy Air 5 2026-05-23
ENY3980 - 5 2026-07-21
ENY3977 - 5 2026-07-13
ENY3971 Envoy Air 5 2026-06-18
ENY3657 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3430 IND → MIA Jul 26, 20:25 UTCJul 26, 21:15 UTC50m
2026-07-26 ENY3430 IND → MIA Jul 26, 16:55 UTCJul 26, 18:30 UTC1h 35m
2026-07-26 ENY4104 CVG → BOS Jul 26, 14:10 UTCJul 26, 15:00 UTC50m
2026-07-26 ENY4104 CVG → BOS Jul 26, 12:45 UTCJul 26, 13:25 UTC40m
2026-07-26 ENY3466 BOS → IND Jul 26, 00:50 UTCJul 26, 01:40 UTC50m
2026-07-25 ENY3466 BOS → IND Jul 25, 22:55 UTCJul 25, 23:45 UTC50m
2026-07-25 ENY4135 STL → ORD Jul 25, 17:25 UTCJul 25, 18:55 UTC1h 30m
2026-07-25 ENY4135 STL → ORD Jul 25, 17:21 UTCJul 25, 18:50 UTC1h 29m
2026-07-25 ENY4135 STL → ORD Jul 25, 14:50 UTCJul 25, 16:10 UTC1h 20m
2026-07-25 ENY3460 DFW → HRL Jul 25, 10:50 UTCJul 25, 12:40 UTC1h 50m
2026-07-25 ENY3463 HUX → DFW Jul 25, 02:30 UTCJul 25, 04:00 UTC1h 30m
2026-07-24 ENY3932 IND → DCA Jul 24, 23:00 UTCJul 25, 00:30 UTC1h 30m
2026-07-24 ENY3932 IND → DCA Jul 24, 22:58 UTCJul 25, 00:29 UTC1h 31m
2026-07-24 ENY3932 IND → DCA Jul 24, 20:45 UTCJul 24, 22:05 UTC1h 20m
2026-07-24 ENY3606 ORD → YYZ Jul 24, 17:40 UTCJul 24, 19:05 UTC1h 25m
2026-07-24 ENY3606 ORD → YYZ Jul 24, 15:00 UTCJul 24, 16:05 UTC1h 5m
2026-07-24 ENY3587 AVP → ORD Jul 24, 11:50 UTCJul 24, 13:30 UTC1h 40m
2026-07-24 ENY4140 LEX → ORD Jul 24, 02:45 UTCJul 24, 04:10 UTC1h 25m
2026-07-23 ENY3932 IND → DCA Jul 23, 23:00 UTCJul 24, 00:35 UTC1h 35m
2026-07-23 ENY3932 IND → DCA Jul 23, 20:35 UTCJul 23, 21:50 UTC1h 15m
2026-07-23 ENY3606 ORD → YYZ Jul 23, 17:35 UTCJul 23, 18:45 UTC1h 10m
2026-07-23 ENY3606 ORD → YYZ Jul 23, 15:10 UTCJul 23, 16:20 UTC1h 10m
2026-07-23 ENY4150 MHT → ORD Jul 23, 11:15 UTCJul 23, 13:30 UTC2h 15m
2026-07-23 ENY4149 ORD → MHT Jul 23, 01:10 UTCJul 23, 02:50 UTC1h 40m
2026-07-22 ENY3409 DFW → CRP Jul 22, 21:40 UTCJul 23, 00:05 UTC2h 25m
2026-07-22 ENY3409 DFW → CRP Jul 22, 21:37 UTCJul 22, 23:40 UTC2h 3m
2026-07-22 ENY3409 DFW → CRP Jul 22, 18:45 UTCJul 22, 20:20 UTC1h 35m
2026-07-22 ENY3683 RDU → ORD Jul 22, 15:40 UTCJul 22, 17:10 UTC1h 30m
2026-07-22 ENY3683 RDU → ORD Jul 22, 13:25 UTCJul 22, 14:40 UTC1h 15m
2026-07-21 ENY3980 - Jul 21, 22:10 UTCJul 21, 22:55 UTC45m
2026-07-21 ENY3980 - Jul 21, 20:30 UTCJul 21, 21:15 UTC45m
2026-07-21 ENY4153 - Jul 21, 16:40 UTCJul 21, 18:50 UTC2h 10m
2026-07-21 ENY4153 VPS → ORD Jul 21, 16:38 UTCJul 21, 18:51 UTC2h 13m
2026-07-21 ENY4153 - Jul 21, 13:45 UTCJul 21, 15:15 UTC1h 30m
2026-07-21 ENY3570 GRB → ORD Jul 21, 11:15 UTCJul 21, 12:00 UTC45m
2026-07-21 ENY3663 ORD → MCI Jul 21, 04:50 UTCJul 21, 05:25 UTC35m
2026-07-21 ENY3406 PIA → DFW Jul 21, 02:05 UTCJul 21, 03:30 UTC1h 25m
2026-07-21 ENY3406 PIA → DFW Jul 21, 02:01 UTCJul 21, 03:24 UTC1h 23m
2026-07-20 ENY3406 PIA → DFW Jul 20, 23:40 UTCJul 21, 00:55 UTC1h 15m
2026-07-20 ENY3428 ORD → ORF Jul 20, 19:50 UTCJul 20, 21:40 UTC1h 50m
2026-07-20 ENY3428 ORD → ORF Jul 20, 18:05 UTCJul 20, 18:15 UTC10m
2026-07-20 ENY3428 ORD → ORF Jul 20, 15:40 UTCJul 20, 17:30 UTC1h 50m
2026-07-20 ENY4144 STL → ORD Jul 20, 02:05 UTCJul 20, 02:55 UTC50m
2026-07-20 ENY4144 STL → ORD Jul 20, 02:03 UTCJul 20, 02:51 UTC48m
2026-07-20 ENY4144 - Jul 20, 00:35 UTCJul 20, 01:20 UTC45m
2026-07-19 ENY3523 FAR → ORD Jul 19, 21:45 UTCJul 19, 23:05 UTC1h 20m
2026-07-19 ENY3523 FAR → ORD Jul 19, 21:45 UTCJul 19, 23:05 UTC1h 20m
2026-07-19 ENY3523 - Jul 19, 19:20 UTCJul 19, 20:50 UTC1h 30m
2026-07-19 ENY3455 - Jul 19, 17:10 UTCJul 19, 18:00 UTC50m
2026-07-19 ENY3455 - Jul 19, 15:15 UTCJul 19, 15:55 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 N225NN page for operator, model, and routing details .

Mode-S A1F4CD frequently asked

What is Mode-S code A1F4CD?
A1F4CD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N225NN.
Where is Mode-S A1F4CD registered?
Mode-S code A1F4CD 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 A1F4CD broadcasting right now?
Yes. Mode-S A1F4CD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1F4CD, octal 50372315, decimal 10,613,965.
What flights does A1F4CD operate?
Mode-S A1F4CD has broadcast 20 distinct callsigns, including ENY4084, ENY4161, ENY4153, ENY4114, ENY3932.