Apparatus

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sensors Mode-S transponder

A243CB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N245NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A243CB
Octal
50441713
Decimal
10,634,187
Country
US
Tail
N245NN
Type
E75L
Broadcasting now · callsign ENY3732 · 4,875 ft
Flights observed
800
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

Current position

A243CB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A243CB 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
ENY3532 - 11 2026-07-09
ENY3777 - 10 2026-07-02
ENY3442 - 10 2026-07-15
ENY4230 - 9 2026-06-27
ENY3468 Envoy Air 8 2026-07-23
ENY4202 Envoy Air 7 2026-07-21
ENY4100 Envoy Air 7 2026-07-24
ENY3598 - 7 2026-07-01
ENY3481 - 7 2026-07-17
ENY4157 Envoy Air 6 2026-04-27
ENY4010 - 6 2026-06-19
ENY3847 - 6 2026-07-16
ENY3636 - 6 2026-07-09
ENY3632 Envoy Air 6 2026-07-20
ENY3623 - 6 2026-06-24
ENY3507 Envoy Air 6 2026-07-24
ENY4263 - 5 2026-07-14
ENY4027 - 5 2026-06-26
ENY3803 - 5 2026-07-17
ENY3666 Envoy Air 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3826 PIA → ORD Jul 26, 19:50 UTCJul 26, 21:55 UTC2h 5m
2026-07-26 ENY3804 ATL → ORD Jul 26, 16:45 UTCJul 26, 17:55 UTC1h 10m
2026-07-26 ENY3804 ATL → ORD Jul 26, 16:42 UTCJul 26, 17:49 UTC1h 7m
2026-07-26 ENY3804 ATL → ORD Jul 26, 14:40 UTCJul 26, 15:40 UTC1h 0m
2026-07-26 ENY3497 ORD → BHM Jul 26, 11:15 UTCJul 26, 13:15 UTC2h 0m
2026-07-26 ENY3497 ORD → BHM Jul 26, 11:10 UTCJul 26, 13:17 UTC2h 7m
2026-07-26 ENY3494 SGF → DFW Jul 26, 02:48 UTCJul 26, 04:55 UTC2h 7m
2026-07-26 ENY3494 SGF → DFW Jul 26, 02:50 UTCJul 26, 05:00 UTC2h 10m
2026-07-25 ENY3851 DFW → CHA Jul 25, 18:25 UTCJul 26, 01:15 UTC6h 50m
2026-07-25 ENY4187 ORD → CVG Jul 25, 15:40 UTCJul 25, 16:10 UTC30m
2026-07-25 ENY3831 BTR → DFW Jul 25, 14:20 UTCJul 25, 14:40 UTC20m
2026-07-25 ENY3874 ORD → CVG Jul 25, 06:15 UTCJul 25, 12:55 UTC6h 40m
2026-07-25 ENY4021 PHX → CLD Jul 25, 04:20 UTCJul 25, 05:15 UTC55m
2026-07-25 ENY4021 PHX → CLD Jul 25, 02:50 UTCJul 25, 03:40 UTC50m
2026-07-24 ENY3998 BNA → DFW Jul 24, 23:15 UTCJul 25, 01:15 UTC2h 0m
2026-07-24 ENY3998 BNA → DFW Jul 24, 23:12 UTCJul 25, 01:09 UTC1h 57m
2026-07-24 ENY3998 BNA → DFW Jul 24, 19:50 UTCJul 24, 22:05 UTC2h 15m
2026-07-24 ENY9868 ORD → MKE Jul 24, 16:25 UTCJul 24, 18:15 UTC1h 50m
2026-07-24 ENY4100 HRL → DFW Jul 24, 14:05 UTCJul 24, 15:15 UTC1h 10m
2026-07-24 ENY4100 HRL → DFW Jul 24, 12:20 UTCJul 24, 13:10 UTC50m
2026-07-24 ENY3654 FAR → ORD Jul 24, 10:10 UTCJul 24, 10:50 UTC40m
2026-07-24 ENY3431 DFW → BTR Jul 24, 04:10 UTCJul 24, 04:45 UTC35m
2026-07-24 ENY3507 DFW → STS Jul 24, 00:40 UTCJul 24, 02:05 UTC1h 25m
2026-07-24 ENY3507 DFW → STS Jul 24, 00:33 UTCJul 24, 02:04 UTC1h 31m
2026-07-23 ENY3507 DFW → STS Jul 23, 20:25 UTCJul 23, 21:45 UTC1h 20m
2026-07-23 ENY3549 CLT → MYR Jul 23, 18:35 UTCJul 23, 19:10 UTC35m
2026-07-23 ENY3549 CLT → MYR Jul 23, 18:30 UTCJul 23, 19:09 UTC39m
2026-07-23 ENY3549 CLT → MYR Jul 23, 17:10 UTCJul 23, 17:40 UTC30m
2026-07-23 ENY3468 ATL → ORD Jul 23, 15:19 UTCJul 23, 15:59 UTC40m
2026-07-23 ENY3468 ATL → ORD Jul 23, 15:20 UTCJul 23, 16:05 UTC45m
2026-07-23 ENY3468 ATL → ORD Jul 23, 13:30 UTCJul 23, 14:05 UTC35m
2026-07-23 ENY3601 GRR → MIA Jul 23, 11:10 UTCJul 23, 11:50 UTC40m
2026-07-23 ENY3601 GRR → MIA Jul 23, 11:08 UTCJul 23, 11:44 UTC36m
2026-07-23 ENY3666 JAX → ORD Jul 23, 04:00 UTCJul 23, 04:25 UTC25m
2026-07-23 ENY3449 MIA → BWI Jul 23, 00:30 UTCJul 23, 02:35 UTC2h 5m
2026-07-22 ENY3449 MIA → BWI Jul 22, 20:30 UTCJul 22, 22:25 UTC1h 55m
2026-07-22 ENY3577 DFW → LRD Jul 22, 17:25 UTCJul 22, 18:55 UTC1h 30m
2026-07-22 ENY3577 DFW → LRD Jul 22, 15:05 UTCJul 22, 16:25 UTC1h 20m
2026-07-22 ENY3369 CLT → CVG Jul 22, 12:05 UTCJul 22, 13:15 UTC1h 10m
2026-07-22 ENY3723 DFW → CUU Jul 22, 03:05 UTCJul 22, 04:05 UTC1h 0m
2026-07-22 ENY3723 DFW → CUU Jul 22, 03:01 UTCJul 22, 04:27 UTC1h 26m
2026-07-21 ENY3964 SAV → DFW Jul 21, 23:15 UTCJul 22, 00:15 UTC1h 0m
2026-07-21 ENY3964 SAV → DFW Jul 21, 21:20 UTCJul 21, 22:10 UTC50m
2026-07-21 ENY4202 ORD → STL Jul 21, 18:40 UTCJul 21, 20:05 UTC1h 25m
2026-07-21 ENY4202 ORD → STL Jul 21, 16:15 UTCJul 21, 17:30 UTC1h 15m
2026-07-21 ENY3810 MTY → DFW Jul 21, 13:15 UTCJul 21, 14:40 UTC1h 25m
2026-07-21 ENY3810 MTY → DFW Jul 21, 13:14 UTCJul 21, 14:34 UTC1h 20m
2026-07-21 ENY3459 ORD → FAR Jul 21, 01:15 UTCJul 21, 02:40 UTC1h 25m
2026-07-21 ENY3459 ORD → FAR Jul 21, 01:12 UTCJul 21, 02:36 UTC1h 24m
2026-07-20 ENY3434 DFW → MTY Jul 20, 21:40 UTCJul 20, 23:10 UTC1h 30m

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 N245NN page for operator, model, and routing details .

Mode-S A243CB frequently asked

What is Mode-S code A243CB?
A243CB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N245NN.
Where is Mode-S A243CB registered?
Mode-S code A243CB 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 A243CB broadcasting right now?
Yes. Mode-S A243CB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A243CB, octal 50441713, decimal 10,634,187.
What flights does A243CB operate?
Mode-S A243CB has broadcast 20 distinct callsigns, including ENY3532, ENY3777, ENY3442, ENY4230, ENY3468.