Apparatus

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sensors Mode-S transponder

A209B9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N230NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A209B9
Octal
50404671
Decimal
10,619,321
Country
US
Tail
N230NN
Type
E75L
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
763
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A209B9.

Country allocation

The ICAO 24-bit address A209B9 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
ENY3804 - 8 2026-07-09
ENY4128 Envoy Air 7 2026-05-19
ENY4104 Envoy Air 7 2026-07-21
ENY3478 Envoy Air 7 2026-06-09
ENY3665 - 6 2026-07-12
ENY3623 Envoy Air 6 2026-06-10
ENY3591 Envoy Air 6 2026-06-17
ENY3523 - 6 2026-07-21
ENY3479 Envoy Air 6 2026-06-21
ENY3467 Envoy Air 6 2026-06-12
ENY3445 Envoy Air 6 2026-05-13
ENY3439 Envoy Air 6 2026-05-25
ENY3335 - 6 2026-07-07
ENY4138 - 5 2026-07-13
ENY4106 Envoy Air 5 2026-05-30
ENY4101 Envoy Air 5 2026-06-13
ENY4078 Envoy Air 5 2026-06-16
ENY3997 Envoy Air 5 2026-06-03
ENY3969 Envoy Air 5 2026-07-26
ENY3657 Envoy Air 5 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3381 BOS → CMH Jul 26, 21:30 UTCJul 26, 22:15 UTC45m
2026-07-26 ENY4202 ORD → STL Jul 26, 18:35 UTCJul 26, 20:05 UTC1h 30m
2026-07-26 ENY4202 ORD → STL Jul 26, 16:15 UTCJul 26, 17:30 UTC1h 15m
2026-07-26 ENY4100 HRL → DFW Jul 26, 14:05 UTCJul 26, 15:10 UTC1h 5m
2026-07-26 ENY4100 HRL → DFW Jul 26, 12:20 UTCJul 26, 13:15 UTC55m
2026-07-26 ENY3654 FAR → ORD Jul 26, 10:10 UTCJul 26, 10:50 UTC40m
2026-07-26 ENY3431 DFW → BTR Jul 26, 04:15 UTCJul 26, 04:45 UTC30m
2026-07-26 ENY3431 DFW → BTR Jul 26, 04:14 UTCJul 26, 04:44 UTC30m
2026-07-26 ENY3969 DCA → CHS Jul 26, 00:25 UTCJul 26, 01:10 UTC45m
2026-07-25 ENY3969 DCA → CHS Jul 25, 22:25 UTCJul 25, 23:05 UTC40m
2026-07-25 ENY4202 ORD → STL Jul 25, 18:45 UTCJul 25, 20:05 UTC1h 20m
2026-07-25 ENY4202 ORD → STL Jul 25, 16:10 UTCJul 25, 17:25 UTC1h 15m
2026-07-25 ENY3448 BTV → DCA Jul 25, 13:10 UTCJul 25, 14:45 UTC1h 35m
2026-07-25 ENY3659 MIA → STL Jul 25, 00:25 UTCJul 25, 01:50 UTC1h 25m
2026-07-25 ENY3659 MIA → STL Jul 25, 00:24 UTCJul 25, 01:49 UTC1h 25m
2026-07-24 ENY3721 MQT → ORD Jul 24, 22:20 UTCJul 24, 23:30 UTC1h 10m
2026-07-24 ENY3721 MQT → ORD Jul 24, 20:10 UTCJul 24, 21:15 UTC1h 5m
2026-07-24 ENY3411 GCK → DFW Jul 24, 10:15 UTCJul 24, 11:05 UTC50m
2026-07-24 ENY3357 ELP → AUS Jul 24, 03:10 UTCJul 24, 04:20 UTC1h 10m
2026-07-24 ENY557G GSP → DFW Jul 24, 00:15 UTCJul 24, 02:10 UTC1h 55m
2026-07-23 ENY3558 TRI → DFW Jul 23, 21:35 UTCJul 23, 23:20 UTC1h 45m
2026-07-23 ENY4237 MIA → EIS Jul 23, 17:15 UTCJul 23, 19:35 UTC2h 20m
2026-07-23 ENY3363 - Jul 23, 15:40 UTCJul 23, 15:50 UTC10m
2026-07-23 ENY3363 - Jul 23, 13:35 UTCJul 23, 13:55 UTC20m
2026-07-23 ENY3806 GSP → MIA Jul 23, 10:45 UTCJul 23, 12:15 UTC1h 30m
2026-07-23 ENY3435 ORD → RST Jul 23, 02:05 UTCJul 23, 03:30 UTC1h 25m
2026-07-22 ENY4085 MIA → MSN Jul 22, 22:30 UTCJul 23, 00:45 UTC2h 15m
2026-07-22 ENY3361 BNA → ORD Jul 22, 20:35 UTCJul 22, 21:25 UTC50m
2026-07-22 ENY3733 - Jul 22, 17:20 UTCJul 22, 19:15 UTC1h 55m
2026-07-22 ENY3733 - Jul 22, 14:20 UTCJul 22, 15:45 UTC1h 25m
2026-07-22 ENY3751 ELP → AUS Jul 22, 11:10 UTCJul 22, 12:30 UTC1h 20m
2026-07-22 ENY3752 ORD → HPN Jul 22, 01:05 UTCJul 22, 02:45 UTC1h 40m
2026-07-21 ENY3523 - Jul 21, 22:05 UTCJul 21, 23:20 UTC1h 15m
2026-07-21 ENY3523 - Jul 21, 19:35 UTCJul 21, 21:10 UTC1h 35m
2026-07-21 ENY3476 - Jul 21, 17:35 UTCJul 21, 18:15 UTC40m
2026-07-21 ENY3476 - Jul 21, 16:25 UTCJul 21, 16:55 UTC30m
2026-07-21 ENY4104 CVG → BOS Jul 21, 14:15 UTCJul 21, 15:00 UTC45m
2026-07-21 ENY4104 CVG → BOS Jul 21, 12:30 UTCJul 21, 13:20 UTC50m
2026-07-21 ENY3454 - Jul 21, 02:50 UTCJul 21, 04:50 UTC2h 0m
2026-07-21 ENY3454 - Jul 21, 00:00 UTCJul 21, 01:50 UTC1h 50m
2026-07-20 ENY3718 - Jul 20, 15:10 UTCJul 20, 22:25 UTC7h 15m
2026-07-20 ENY3590 RDU → DCA Jul 20, 11:40 UTCJul 20, 13:05 UTC1h 25m
2026-07-20 ENY3590 RDU → DCA Jul 20, 11:37 UTCJul 20, 13:09 UTC1h 32m
2026-07-20 ENY4037 LRD → DFW Jul 20, 02:40 UTCJul 20, 04:50 UTC2h 10m
2026-07-20 ENY4204 CLD → PHX Jul 20, 00:20 UTCJul 20, 01:15 UTC55m
2026-07-19 ENY4204 PHX → CLD Jul 19, 22:20 UTCJul 19, 23:10 UTC50m
2026-07-19 ENY3793 SEA → PHX Jul 19, 18:40 UTCJul 19, 21:10 UTC2h 30m
2026-07-19 ENY3793 PHX → SEA Jul 19, 14:30 UTCJul 19, 17:00 UTC2h 30m
2026-07-19 ENY3907 - Jul 19, 11:00 UTCJul 19, 12:50 UTC1h 50m
2026-07-19 ENY3933 - Jul 19, 02:30 UTCJul 19, 04:30 UTC2h 0m

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 N230NN page for operator, model, and routing details .

Mode-S A209B9 frequently asked

What is Mode-S code A209B9?
A209B9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N230NN.
Where is Mode-S A209B9 registered?
Mode-S code A209B9 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 A209B9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A209B9, octal 50404671, decimal 10,619,321.
What flights does A209B9 operate?
Mode-S A209B9 has broadcast 20 distinct callsigns, including ENY3804, ENY4128, ENY4104, ENY3478, ENY3665.