Apparatus

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sensors Mode-S transponder

A2CF34

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N280NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A2CF34
Octal
50547464
Decimal
10,669,876
Country
US
Tail
N280NN
Type
E75L
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
733
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

Last known position

Most recent position reported by Mode-S A2CF34.

Country allocation

The ICAO 24-bit address A2CF34 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
ENY3770 - 11 2026-07-21
ENY3908 - 9 2026-07-16
ENY3717 - 9 2026-07-17
ENY4021 Envoy Air 8 2026-07-22
ENY3583 - 8 2026-07-14
ENY3375 Envoy Air 8 2026-06-12
ENY4099 - 7 2026-06-23
ENY4048 Envoy Air 7 2026-07-26
ENY4153 - 6 2026-06-27
ENY4070 Envoy Air 6 2026-07-20
ENY3474 Envoy Air 6 2026-05-21
ENY4256 Envoy Air 5 2026-04-25
ENY4171 Envoy Air 5 2026-05-10
ENY4154 Envoy Air 5 2026-07-22
ENY4135 Envoy Air 5 2026-05-23
ENY4091 - 5 2026-07-09
ENY4076 - 5 2026-07-13
ENY4031 - 5 2026-07-10
ENY4022 Envoy Air 5 2026-07-22
ENY3773 Envoy Air 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3892 MSN → CLT Jul 26, 17:30 UTCJul 26, 22:00 UTC4h 30m
2026-07-26 ENY4048 IAH → DFW Jul 26, 13:20 UTCJul 26, 15:40 UTC2h 20m
2026-07-26 ENY4028 BOS → CVG Jul 26, 05:00 UTCJul 26, 07:00 UTC2h 1m
2026-07-26 ENY4028 BOS → CVG Jul 26, 04:55 UTCJul 26, 06:59 UTC2h 4m
2026-07-26 ENY4126 LBB → DFW Jul 26, 03:35 UTCJul 26, 04:00 UTC25m
2026-07-26 ENY4126 LBB → DFW Jul 26, 02:00 UTCJul 26, 02:45 UTC45m
2026-07-26 ENY4192 GSO → ORD Jul 26, 00:20 UTCJul 26, 00:55 UTC35m
2026-07-25 ENY4192 GSO → ORD Jul 25, 22:35 UTCJul 25, 22:55 UTC20m
2026-07-25 ENY3720 MSN → CMH Jul 25, 19:50 UTCJul 25, 21:25 UTC1h 35m
2026-07-25 ENY3720 MSN → CMH Jul 25, 19:47 UTCJul 25, 21:19 UTC1h 32m
2026-07-25 ENY3720 MSN → CMH Jul 25, 17:15 UTCJul 25, 18:25 UTC1h 10m
2026-07-25 ENY3792 XNA → ORD Jul 25, 13:20 UTCJul 25, 15:50 UTC2h 30m
2026-07-25 ENY4307 ORD → PIT Jul 25, 01:15 UTCJul 25, 03:45 UTC2h 30m
2026-07-24 ENY4114 - Jul 24, 21:40 UTCJul 24, 23:50 UTC2h 10m
2026-07-24 ENY4114 - Jul 24, 18:50 UTCJul 24, 20:50 UTC2h 0m
2026-07-24 ENY3773 PVD → ORD Jul 24, 13:40 UTCJul 24, 14:55 UTC1h 15m
2026-07-24 ENY3773 PVD → ORD Jul 24, 12:50 UTCJul 24, 13:00 UTC10m
2026-07-24 ENY3597 RDU → ORD Jul 24, 03:35 UTCJul 24, 05:30 UTC1h 55m
2026-07-24 ENY3597 RDU → ORD Jul 24, 03:32 UTCJul 24, 05:27 UTC1h 55m
2026-07-23 ENY4114 - Jul 23, 22:20 UTCJul 24, 00:40 UTC2h 20m
2026-07-23 ENY4114 - Jul 23, 19:30 UTCJul 23, 21:30 UTC2h 0m
2026-07-23 ENY3804 ATL → ORD Jul 23, 16:45 UTCJul 23, 17:50 UTC1h 5m
2026-07-23 ENY3804 ATL → ORD Jul 23, 14:40 UTCJul 23, 15:45 UTC1h 5m
2026-07-23 ENY3634 ILM → BOS Jul 23, 01:45 UTCJul 23, 02:45 UTC1h 0m
2026-07-23 ENY3634 ILM → BOS Jul 23, 01:41 UTCJul 23, 02:48 UTC1h 7m
2026-07-22 ENY3634 ILM → BOS Jul 22, 23:40 UTCJul 23, 00:40 UTC1h 0m
2026-07-22 ENY4081 SGF → CLT Jul 22, 19:35 UTCJul 22, 22:15 UTC2h 40m
2026-07-22 ENY4081 SGF → CLT Jul 22, 15:55 UTCJul 22, 18:25 UTC2h 30m
2026-07-22 ENY4022 CLD → PHX Jul 22, 13:45 UTCJul 22, 14:35 UTC50m
2026-07-22 ENY4154 DFW → MTY Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-22 ENY4021 PHX → CLD Jul 22, 02:20 UTCJul 22, 03:05 UTC45m
2026-07-22 ENY4021 PHX → CLD Jul 22, 00:30 UTCJul 22, 01:20 UTC50m
2026-07-21 ENY3770 - Jul 21, 21:00 UTCJul 21, 23:25 UTC2h 25m
2026-07-21 ENY3770 PHX → RDM Jul 21, 17:45 UTCJul 21, 19:40 UTC1h 55m
2026-07-21 ENY3879 MLI → DFW Jul 21, 13:15 UTCJul 21, 16:05 UTC2h 50m
2026-07-21 ENY3923 DFW → MID Jul 21, 02:10 UTCJul 21, 05:20 UTC3h 10m
2026-07-20 ENY3513 YYZ → DFW Jul 20, 23:40 UTCJul 21, 01:00 UTC1h 20m
2026-07-20 ENY3513 YYZ → DFW Jul 20, 21:10 UTCJul 20, 22:15 UTC1h 5m
2026-07-20 ENY4070 ORD → BMI Jul 20, 18:10 UTCJul 20, 19:55 UTC1h 45m
2026-07-20 ENY3766 - Jul 20, 15:00 UTCJul 20, 16:45 UTC1h 45m
2026-07-20 ENY3524 BOS → ILM Jul 20, 11:30 UTCJul 20, 12:45 UTC1h 15m
2026-07-20 ENY3524 BOS → ILM Jul 20, 11:29 UTCJul 20, 12:40 UTC1h 11m
2026-07-20 ENY3456 HPN → ORD Jul 20, 02:20 UTCJul 20, 03:00 UTC40m
2026-07-20 ENY3456 HPN → ORD Jul 20, 02:19 UTCJul 20, 03:20 UTC1h 1m
2026-07-19 ENY3409 - Jul 19, 21:40 UTCJul 19, 23:45 UTC2h 5m
2026-07-19 ENY3409 - Jul 19, 19:00 UTCJul 19, 20:40 UTC1h 40m
2026-07-19 ENY3488 ORD → AUS Jul 19, 16:20 UTCJul 19, 17:20 UTC1h 0m
2026-07-19 ENY4121 BUF → ORD Jul 19, 12:55 UTCJul 19, 14:55 UTC2h 0m
2026-07-19 ENY4121 BUF → ORD Jul 19, 12:50 UTCJul 19, 14:51 UTC2h 1m
2026-07-19 ENY3888 DCA → MSP Jul 19, 10:15 UTCJul 19, 11:40 UTC1h 25m

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 N280NN page for operator, model, and routing details .

Mode-S A2CF34 frequently asked

What is Mode-S code A2CF34?
A2CF34 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N280NN.
Where is Mode-S A2CF34 registered?
Mode-S code A2CF34 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 A2CF34 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2CF34, octal 50547464, decimal 10,669,876.
What flights does A2CF34 operate?
Mode-S A2CF34 has broadcast 20 distinct callsigns, including ENY3770, ENY3908, ENY3717, ENY4021, ENY3583.