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 ENY4101 · 3,325 ft
Flights observed
701
Distinct callsigns
20
Country
US
Last broadcast
1h ago

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
ENY4230 - 9 2026-06-27
ENY3442 - 8 2026-07-12
ENY3598 - 7 2026-07-01
ENY4157 Envoy Air 6 2026-04-27
ENY4010 - 6 2026-06-19
ENY3636 - 6 2026-07-09
ENY3623 - 6 2026-06-24
ENY4202 Envoy Air 5 2026-06-03
ENY4100 Envoy Air 5 2026-06-15
ENY4027 - 5 2026-06-26
ENY3580 Envoy Air 5 2026-04-21
ENY3576 Envoy Air 5 2026-05-03
ENY3575 - 5 2026-06-18
ENY3557 - 5 2026-07-12
ENY3554 - 5 2026-06-23
ENY3481 Envoy Air 5 2026-06-03
ENY3478 - 5 2026-07-01
ENY3468 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ENY3434 - Jul 13, 23:25 UTCJul 14, 00:45 UTC1h 20m
2026-07-13 ENY3434 DFW → BMI Jul 13, 20:45 UTCJul 13, 22:25 UTC1h 40m
2026-07-13 ENY3340 - Jul 13, 18:20 UTCJul 13, 18:55 UTC35m
2026-07-13 ENY3340 MTY → DFW Jul 13, 16:41 UTCJul 13, 18:05 UTC1h 24m
2026-07-13 ENY3340 MTY → DFW Jul 13, 16:45 UTCJul 13, 18:55 UTC2h 10m
2026-07-13 ENY3703 - Jul 13, 14:05 UTCJul 13, 14:45 UTC40m
2026-07-13 ENY3703 DFW → MTY Jul 13, 14:05 UTCJul 13, 15:17 UTC1h 12m
2026-07-13 ENY3930 - Jul 13, 12:00 UTCJul 13, 13:00 UTC1h 0m
2026-07-13 ENY3900 - Jul 13, 06:25 UTCJul 13, 07:01 UTC35m
2026-07-13 ENY3797 - Jul 13, 03:10 UTCJul 13, 04:10 UTC1h 0m
2026-07-13 ENY3797 - Jul 13, 00:25 UTCJul 13, 01:20 UTC55m
2026-07-12 ENY3999 - Jul 12, 21:05 UTCJul 12, 22:40 UTC1h 35m
2026-07-12 ENY3999 - Jul 12, 18:55 UTCJul 12, 19:45 UTC50m
2026-07-12 ENY3442 - Jul 12, 15:55 UTCJul 12, 17:05 UTC1h 10m
2026-07-12 ENY3442 - Jul 12, 13:45 UTCJul 12, 14:45 UTC1h 0m
2026-07-12 ENY3885 - Jul 12, 11:10 UTCJul 12, 12:10 UTC1h 0m
2026-07-12 ENY4065 - Jul 12, 03:50 UTCJul 12, 04:45 UTC55m
2026-07-12 ENY3557 - Jul 12, 02:05 UTCJul 12, 02:45 UTC40m
2026-07-12 ENY3557 - Jul 12, 00:40 UTCJul 12, 02:01 UTC1h 20m
2026-07-11 ENY3557 - Jul 11, 21:35 UTCJul 11, 23:25 UTC1h 50m
2026-07-11 ENY3516 - Jul 11, 18:50 UTCJul 11, 20:20 UTC1h 30m
2026-07-11 ENY3516 - Jul 11, 16:40 UTCJul 11, 17:45 UTC1h 5m
2026-07-11 ENY3521 - Jul 11, 11:30 UTCJul 11, 13:25 UTC1h 55m
2026-07-11 ENY4208 - Jul 11, 03:25 UTCJul 11, 05:20 UTC1h 55m
2026-07-10 ENY4125 - Jul 10, 22:20 UTCJul 11, 01:20 UTC3h 0m
2026-07-10 ENY4125 TQO → DFW Jul 10, 22:17 UTCJul 11, 01:17 UTC3h 0m
2026-07-10 ENY4125 - Jul 10, 18:10 UTCJul 10, 20:45 UTC2h 35m
2026-07-10 ENY4125 DFW → TQO Jul 10, 18:09 UTCJul 10, 21:03 UTC2h 54m
2026-07-10 ENY3503 - Jul 10, 15:15 UTCJul 10, 16:55 UTC1h 40m
2026-07-10 ENY3503 DFW → ECP Jul 10, 12:50 UTCJul 10, 14:25 UTC1h 35m
2026-07-09 ENY3532 - Jul 9, 23:50 UTCJul 10, 01:50 UTC2h 0m
2026-07-09 ENY3532 FWA → DFW Jul 9, 23:45 UTCJul 10, 01:45 UTC2h 0m
2026-07-09 ENY3532 - Jul 9, 21:00 UTCJul 9, 22:45 UTC1h 45m
2026-07-09 ENY3636 - Jul 9, 19:15 UTCJul 9, 20:00 UTC45m
2026-07-09 ENY3636 LIT → DFW Jul 9, 19:05 UTCJul 9, 19:53 UTC48m
2026-07-09 ENY3636 - Jul 9, 17:00 UTCJul 9, 17:45 UTC45m
2026-07-09 ENY3468 CLL → DFW Jul 9, 15:00 UTCJul 9, 15:45 UTC45m
2026-07-09 ENY3468 CLL → DFW Jul 9, 15:00 UTCJul 9, 15:41 UTC41m
2026-07-09 ENY3468 DFW → CLL Jul 9, 13:25 UTCJul 9, 13:50 UTC25m
2026-07-09 ENY3601 - Jul 9, 11:05 UTCJul 9, 11:40 UTC35m
2026-07-09 ENY3666 - Jul 9, 04:05 UTCJul 9, 04:30 UTC25m
2026-07-09 ENY3666 DFW → GGG Jul 9, 04:03 UTCJul 9, 04:30 UTC27m
2026-07-09 ENY3890 - Jul 9, 00:35 UTCJul 9, 01:40 UTC1h 5m
2026-07-08 ENY3890 - Jul 8, 22:20 UTCJul 8, 23:20 UTC1h 0m
2026-07-08 ENY3618 - Jul 8, 20:20 UTCJul 8, 21:05 UTC45m
2026-07-08 ENY3618 LBB → DFW Jul 8, 20:17 UTCJul 8, 21:02 UTC45m
2026-07-08 ENY3618 - Jul 8, 18:25 UTCJul 8, 19:10 UTC45m
2026-07-08 ENY3442 - Jul 8, 15:55 UTCJul 8, 17:05 UTC1h 10m
2026-07-08 ENY3442 BRO → DFW Jul 8, 15:50 UTCJul 8, 17:04 UTC1h 14m
2026-07-08 ENY3442 - Jul 8, 13:45 UTCJul 8, 14:50 UTC1h 5m

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, ENY4230, ENY3442, ENY3598.