Apparatus

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sensors Mode-S transponder

A22B28

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N239NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A22B28
Octal
50425450
Decimal
10,627,880
Country
US
Tail
N239NN
Type
E75L
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
731
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A22B28.

Country allocation

The ICAO 24-bit address A22B28 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
ENY4171 - 12 2026-06-19
ENY3428 Envoy Air 12 2026-07-25
ENY3559 Envoy Air 8 2026-07-22
ENY4039 - 7 2026-06-18
ENY4029 Envoy Air 7 2026-06-11
ENY4143 Envoy Air 6 2026-05-11
ENY4115 - 6 2026-06-19
ENY4093 Envoy Air 6 2026-05-11
ENY4003 Envoy Air 6 2026-06-10
ENY3986 - 6 2026-07-09
ENY3976 Envoy Air 6 2026-06-11
ENY3843 - 6 2026-07-11
ENY3809 Envoy Air 6 2026-04-30
ENY3613 Envoy Air 6 2026-07-21
ENY3504 - 6 2026-06-28
ENY4203 Envoy Air 5 2026-05-01
ENY4131 Envoy Air 5 2026-06-07
ENY4123 Envoy Air 5 2026-05-17
ENY4110 - 5 2026-07-01
ENY4064 - 5 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3770 ORD → ATW Jul 26, 21:05 UTCJul 26, 22:00 UTC55m
2026-07-26 ENY3770 ORD → ATW Jul 26, 17:45 UTCJul 26, 19:40 UTC1h 55m
2026-07-26 ENY4033 XNA → PHX Jul 26, 13:35 UTCJul 26, 15:40 UTC2h 5m
2026-07-26 ENY4105 ORD → XNA Jul 26, 00:15 UTCJul 26, 01:25 UTC1h 10m
2026-07-26 ENY4105 ORD → XNA Jul 26, 00:12 UTCJul 26, 01:24 UTC1h 12m
2026-07-25 ENY3428 ORD → ORF Jul 25, 19:40 UTCJul 25, 21:15 UTC1h 35m
2026-07-25 ENY3428 ORD → ORF Jul 25, 15:25 UTCJul 25, 17:10 UTC1h 45m
2026-07-25 ENY3751 ELP → AUS Jul 25, 10:35 UTCJul 25, 12:25 UTC1h 50m
2026-07-25 ENY3752 ORD → HPN Jul 25, 00:55 UTCJul 25, 02:30 UTC1h 35m
2026-07-25 ENY3752 ORD → HPN Jul 25, 00:53 UTCJul 25, 02:29 UTC1h 36m
2026-07-24 ENY4009 CMH → ORD Jul 24, 20:55 UTCJul 24, 22:35 UTC1h 40m
2026-07-24 ENY4009 CMH → ORD Jul 24, 20:44 UTCJul 24, 22:35 UTC1h 51m
2026-07-24 ENY4009 CMH → ORD Jul 24, 17:55 UTCJul 24, 19:30 UTC1h 35m
2026-07-24 ENY3466 BOS → IND Jul 24, 00:55 UTCJul 24, 01:50 UTC55m
2026-07-23 ENY3466 BOS → IND Jul 23, 23:00 UTCJul 23, 23:50 UTC50m
2026-07-23 ENY3428 ORD → ORF Jul 23, 19:45 UTCJul 23, 21:20 UTC1h 35m
2026-07-23 ENY3428 ORD → ORF Jul 23, 18:58 UTCJul 23, 21:15 UTC2h 17m
2026-07-23 ENY3428 ORD → ORF Jul 23, 15:25 UTCJul 23, 17:00 UTC1h 35m
2026-07-23 ENY3948 SBP → PHX Jul 23, 12:40 UTCJul 23, 14:00 UTC1h 20m
2026-07-23 ENY3960 CVG → ORD Jul 23, 04:05 UTCJul 23, 05:15 UTC1h 10m
2026-07-22 ENY3559 CWA → ORD Jul 22, 23:35 UTCJul 23, 01:15 UTC1h 40m
2026-07-22 ENY3559 CWA → ORD Jul 22, 23:31 UTCJul 23, 01:19 UTC1h 48m
2026-07-22 ENY3559 CWA → ORD Jul 22, 21:00 UTCJul 22, 22:05 UTC1h 5m
2026-07-22 ENY3430 IND → MIA Jul 22, 18:15 UTCJul 22, 19:35 UTC1h 20m
2026-07-22 ENY3430 IND → MIA Jul 22, 18:04 UTCJul 22, 19:29 UTC1h 25m
2026-07-22 ENY3430 IND → MIA Jul 22, 15:05 UTCJul 22, 16:50 UTC1h 45m
2026-07-22 ENY3587 AVP → ORD Jul 22, 11:40 UTCJul 22, 13:40 UTC2h 0m
2026-07-22 ENY4140 LEX → ORD Jul 22, 04:05 UTCJul 22, 05:20 UTC1h 15m
2026-07-21 ENY3559 CWA → ORD Jul 21, 23:50 UTCJul 22, 02:10 UTC2h 20m
2026-07-21 ENY3559 CWA → ORD Jul 21, 23:48 UTCJul 22, 02:02 UTC2h 14m
2026-07-21 ENY3559 CWA → ORD Jul 21, 21:05 UTCJul 21, 22:25 UTC1h 20m
2026-07-21 ENY3811 MHT → ORD Jul 21, 17:35 UTCJul 21, 19:30 UTC1h 55m
2026-07-21 ENY3613 DFW → AMA Jul 21, 14:50 UTCJul 21, 16:20 UTC1h 30m
2026-07-21 ENY3613 DFW → AMA Jul 21, 14:47 UTCJul 21, 16:21 UTC1h 34m
2026-07-21 ENY3460 - Jul 21, 11:05 UTCJul 21, 13:05 UTC2h 0m
2026-07-21 ENY3460 ALB → ORD Jul 21, 11:01 UTCJul 21, 13:00 UTC1h 59m
2026-07-21 ENY3463 HUX → DFW Jul 21, 03:30 UTCJul 21, 04:55 UTC1h 25m
2026-07-21 ENY3463 HUX → DFW Jul 21, 03:26 UTCJul 21, 04:55 UTC1h 29m
2026-07-21 ENY3980 - Jul 21, 01:00 UTCJul 21, 01:50 UTC50m
2026-07-20 ENY3980 - Jul 20, 22:05 UTCJul 20, 22:55 UTC50m
2026-07-20 ENY4135 STL → ORD Jul 20, 17:30 UTCJul 20, 19:00 UTC1h 30m
2026-07-20 ENY4135 STL → ORD Jul 20, 17:27 UTCJul 20, 18:58 UTC1h 31m
2026-07-20 ENY4135 STL → ORD Jul 20, 15:05 UTCJul 20, 16:20 UTC1h 15m
2026-07-20 ENY3587 - Jul 20, 11:40 UTCJul 20, 13:10 UTC1h 30m
2026-07-20 ENY3587 AVP → ORD Jul 20, 11:33 UTCJul 20, 13:12 UTC1h 39m
2026-07-20 ENY4140 LEX → ORD Jul 20, 02:20 UTCJul 20, 03:40 UTC1h 20m
2026-07-19 ENY3559 - Jul 19, 23:00 UTCJul 20, 00:35 UTC1h 35m
2026-07-19 ENY3559 - Jul 19, 20:40 UTCJul 19, 21:55 UTC1h 15m
2026-07-19 ENY3606 ORD → YYZ Jul 19, 17:35 UTCJul 19, 18:50 UTC1h 15m
2026-07-19 ENY3606 ORD → YYZ Jul 19, 15:10 UTCJul 19, 16:05 UTC55m

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 N239NN page for operator, model, and routing details .

Mode-S A22B28 frequently asked

What is Mode-S code A22B28?
A22B28 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N239NN.
Where is Mode-S A22B28 registered?
Mode-S code A22B28 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 A22B28 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A22B28, octal 50425450, decimal 10,627,880.
What flights does A22B28 operate?
Mode-S A22B28 has broadcast 20 distinct callsigns, including ENY4171, ENY3428, ENY3559, ENY4039, ENY4029.