Apparatus

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sensors Mode-S transponder

A223BA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N237NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A223BA
Octal
50421672
Decimal
10,625,978
Country
US
Tail
N237NN
Type
E75L
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
758
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S A223BA.

Country allocation

The ICAO 24-bit address A223BA 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
ENY4138 - 15 2026-07-06
ENY4089 Envoy Air 9 2026-07-20
ENY3991 - 9 2026-07-05
ENY3976 - 8 2026-07-05
ENY3720 - 8 2026-07-19
ENY4113 - 7 2026-06-17
ENY3911 Envoy Air 7 2026-07-26
ENY4314 Envoy Air 6 2026-06-06
ENY4187 - 6 2026-07-17
ENY4165 Envoy Air 6 2026-07-20
ENY4155 - 6 2026-06-18
ENY4029 Envoy Air 6 2026-06-12
ENY3992 Envoy Air 6 2026-07-23
ENY3831 - 6 2026-07-17
ENY3751 - 6 2026-07-10
ENY3609 Envoy Air 6 2026-06-04
ENY3606 - 6 2026-06-25
ENY3602 - 6 2026-06-27
ENY3581 - 6 2026-07-07
ENY3455 - 6 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY4189 ATW → DFW Jul 26, 20:50 UTCJul 26, 21:15 UTC25m
2026-07-26 ENY4189 ATW → DFW Jul 26, 19:20 UTCJul 26, 19:50 UTC30m
2026-07-26 ENY4031 ELP → AUS Jul 26, 16:45 UTCJul 26, 18:00 UTC1h 15m
2026-07-26 ENY4031 ELP → AUS Jul 26, 16:45 UTCJul 26, 17:59 UTC1h 14m
2026-07-26 ENY4031 ELP → AUS Jul 26, 14:40 UTCJul 26, 15:45 UTC1h 5m
2026-07-26 ENY3984 BZN → AUS Jul 26, 11:30 UTCJul 26, 13:00 UTC1h 30m
2026-07-26 ENY3911 CMH → DCA Jul 26, 03:35 UTCJul 26, 05:05 UTC1h 30m
2026-07-26 ENY3770 ORD → ATW Jul 26, 01:50 UTCJul 26, 02:15 UTC25m
2026-07-25 ENY3770 ORD → ATW Jul 25, 21:10 UTCJul 26, 00:00 UTC2h 50m
2026-07-25 ENY3770 ORD → ATW Jul 25, 21:08 UTCJul 25, 23:54 UTC2h 46m
2026-07-25 ENY3770 ORD → ATW Jul 25, 17:50 UTCJul 25, 19:45 UTC1h 55m
2026-07-25 ENY4033 XNA → PHX Jul 25, 13:55 UTCJul 25, 16:10 UTC2h 15m
2026-07-25 ENY3693 DFW → XNA Jul 25, 03:45 UTCJul 25, 04:30 UTC45m
2026-07-25 ENY3693 DFW → XNA Jul 25, 03:40 UTCJul 25, 04:30 UTC50m
2026-07-25 ENY3484 ORD → CMI Jul 25, 01:30 UTCJul 25, 02:35 UTC1h 5m
2026-07-24 ENY3484 ORD → CMI Jul 24, 23:45 UTCJul 25, 00:35 UTC50m
2026-07-24 ENY3429 AUS → ORD Jul 24, 19:35 UTCJul 24, 21:55 UTC2h 20m
2026-07-24 ENY3429 AUS → ORD Jul 24, 16:05 UTCJul 24, 18:25 UTC2h 20m
2026-07-24 ENY3401 STS → DFW Jul 24, 13:45 UTCJul 24, 14:30 UTC45m
2026-07-24 ENY3401 STS → DFW Jul 24, 12:10 UTCJul 24, 12:45 UTC35m
2026-07-24 ENY3647 ABI → DFW Jul 24, 10:25 UTCJul 24, 11:05 UTC40m
2026-07-24 ENY3911 CMH → DCA Jul 24, 02:40 UTCJul 24, 04:10 UTC1h 30m
2026-07-24 ENY3911 CMH → DCA Jul 24, 02:36 UTCJul 24, 04:19 UTC1h 43m
2026-07-23 ENY3440 CMI → ORD Jul 23, 22:30 UTCJul 24, 01:00 UTC2h 30m
2026-07-23 ENY3440 CMI → ORD Jul 23, 18:50 UTCJul 23, 21:25 UTC2h 35m
2026-07-23 ENY3992 XNA → DFW Jul 23, 16:40 UTCJul 23, 17:50 UTC1h 10m
2026-07-23 ENY3992 XNA → DFW Jul 23, 14:45 UTCJul 23, 15:55 UTC1h 10m
2026-07-23 ENY3984 BZN → AUS Jul 23, 11:40 UTCJul 23, 13:15 UTC1h 35m
2026-07-23 ENY3911 CMH → DCA Jul 23, 03:00 UTCJul 23, 04:35 UTC1h 35m
2026-07-23 ENY4204 DFW → CMH Jul 23, 00:40 UTCJul 23, 01:40 UTC1h 0m
2026-07-22 ENY4204 DFW → CMH Jul 22, 22:45 UTCJul 22, 23:35 UTC50m
2026-07-21 ENY3508 - Jul 21, 16:35 UTCJul 21, 19:20 UTC2h 45m
2026-07-21 ENY3497 - Jul 21, 11:10 UTCJul 21, 13:30 UTC2h 20m
2026-07-21 ENY3497 MFE → PHX Jul 21, 11:09 UTCJul 21, 13:22 UTC2h 13m
2026-07-21 ENY3494 - Jul 21, 04:20 UTCJul 21, 06:55 UTC2h 35m
2026-07-20 ENY4165 PHX → XNA Jul 20, 23:40 UTCJul 21, 01:30 UTC1h 50m
2026-07-20 ENY4165 PHX → XNA Jul 20, 23:37 UTCJul 21, 01:18 UTC1h 41m
2026-07-20 ENY4165 PHX → XNA Jul 20, 21:10 UTCJul 20, 22:30 UTC1h 20m
2026-07-20 ENY3508 - Jul 20, 16:05 UTCJul 20, 18:50 UTC2h 45m
2026-07-20 ENY3773 - Jul 20, 13:25 UTCJul 20, 14:40 UTC1h 15m
2026-07-20 ENY3773 - Jul 20, 12:40 UTCJul 20, 12:50 UTC10m
2026-07-20 ENY3597 RDU → ORD Jul 20, 04:30 UTCJul 20, 06:20 UTC1h 50m
2026-07-20 ENY4089 TYS → MIA Jul 20, 01:15 UTCJul 20, 02:35 UTC1h 20m
2026-07-19 ENY4089 TYS → MIA Jul 19, 22:45 UTCJul 20, 00:10 UTC1h 25m
2026-07-19 ENY3720 - Jul 19, 19:55 UTCJul 19, 21:25 UTC1h 30m
2026-07-19 ENY3720 MRY → PHX Jul 19, 19:48 UTCJul 19, 21:20 UTC1h 32m
2026-07-19 ENY3720 - Jul 19, 17:40 UTCJul 19, 18:55 UTC1h 15m
2026-07-19 ENY4033 XNA → PHX Jul 19, 13:40 UTCJul 19, 15:50 UTC2h 10m
2026-07-19 ENY4033 XNA → PHX Jul 19, 13:39 UTCJul 19, 15:53 UTC2h 14m
2026-07-18 ENY4086 PHX → XNA Jul 18, 23:40 UTCJul 19, 01:52 UTC2h 12m

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 N237NN page for operator, model, and routing details .

Mode-S A223BA frequently asked

What is Mode-S code A223BA?
A223BA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N237NN.
Where is Mode-S A223BA registered?
Mode-S code A223BA 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 A223BA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A223BA, octal 50421672, decimal 10,625,978.
What flights does A223BA operate?
Mode-S A223BA has broadcast 20 distinct callsigns, including ENY4138, ENY4089, ENY3991, ENY3976, ENY3720.