Apparatus

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sensors Mode-S transponder

A28B5B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N263NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A28B5B
Octal
50505533
Decimal
10,652,507
Country
US
Tail
N263NN
Type
E75L
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
562
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A28B5B.

Country allocation

The ICAO 24-bit address A28B5B 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
ENY3820 - 8 2026-07-07
ENY3560 - 8 2026-07-20
ENY4142 Envoy Air 7 2026-07-23
ENY3844 - 7 2026-07-20
ENY4039 - 6 2026-07-10
ENY3878 Envoy Air 6 2026-06-11
ENY3781 Envoy Air 6 2026-06-10
ENY3555 Envoy Air 6 2026-07-08
ENY3449 Envoy Air 6 2026-07-26
ENY3338 - 6 2026-07-04
ENY4095 - 5 2026-06-23
ENY4082 - 5 2026-07-12
ENY4079 - 5 2026-07-18
ENY3931 - 5 2026-07-11
ENY3562 Envoy Air 5 2026-07-19
ENY3535 Envoy Air 5 2026-05-22
ENY3518 - 5 2026-07-07
ENY3485 Envoy Air 5 2026-07-17
ENY4140 Envoy Air 4 2026-05-13
ENY4020 Envoy Air 4 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3449 MIA → BWI Jul 26, 22:20 UTCJul 26, 22:45 UTC25m
2026-07-26 ENY3776 BOS → ORD Jul 26, 17:40 UTCJul 26, 19:00 UTC1h 20m
2026-07-26 ENY3776 BOS → ORD Jul 26, 14:45 UTCJul 26, 15:55 UTC1h 10m
2026-07-26 ENY3392 AUS → ORD Jul 26, 11:25 UTCJul 26, 13:10 UTC1h 45m
2026-07-26 ENY3385 FAR → DFW Jul 26, 01:15 UTCJul 26, 03:10 UTC1h 55m
2026-07-25 ENY3697 MHK → DFW Jul 25, 21:55 UTCJul 25, 23:20 UTC1h 25m
2026-07-25 ENY3875 DFW → SJT Jul 25, 19:15 UTCJul 25, 20:55 UTC1h 40m
2026-07-25 ENY3938 ORD → CID Jul 25, 16:25 UTCJul 25, 17:50 UTC1h 25m
2026-07-25 ENY3938 ORD → CID Jul 25, 13:55 UTCJul 25, 15:30 UTC1h 35m
2026-07-25 ENY3725 MSY → MIA Jul 25, 11:20 UTCJul 25, 12:05 UTC45m
2026-07-25 ENY3724 MIA → MSY Jul 25, 03:10 UTCJul 25, 03:45 UTC35m
2026-07-25 ENY3724 MIA → MSY Jul 25, 03:05 UTCJul 25, 03:53 UTC48m
2026-07-25 ENY3598 ORD → GRR Jul 25, 00:45 UTCJul 25, 01:45 UTC1h 0m
2026-07-25 ENY3598 ORD → GRR Jul 25, 00:35 UTCJul 25, 01:43 UTC1h 8m
2026-07-24 ENY3598 ORD → GRR Jul 24, 22:45 UTCJul 24, 23:30 UTC45m
2026-07-24 ENY3999 DTW → DCA Jul 24, 21:00 UTCJul 24, 21:50 UTC50m
2026-07-24 ENY3999 DTW → DCA Jul 24, 18:50 UTCJul 24, 19:40 UTC50m
2026-07-24 ENY3340 DFW → SDF Jul 24, 16:15 UTCJul 24, 17:35 UTC1h 20m
2026-07-24 ENY3703 ORD → BOS Jul 24, 14:05 UTCJul 24, 15:15 UTC1h 10m
2026-07-24 ENY3664 CMH → ORD Jul 24, 10:10 UTCJul 24, 12:05 UTC1h 55m
2026-07-24 ENY3658 DFW → FWA Jul 24, 02:55 UTCJul 24, 04:40 UTC1h 45m
2026-07-24 ENY3658 DFW → FWA Jul 24, 02:51 UTCJul 24, 04:41 UTC1h 50m
2026-07-24 ENY3443 BOS → CMH Jul 24, 00:05 UTCJul 24, 01:25 UTC1h 20m
2026-07-24 ENY3443 BOS → CMH Jul 24, 00:00 UTCJul 24, 01:23 UTC1h 23m
2026-07-23 ENY3443 BOS → CMH Jul 23, 22:00 UTCJul 23, 23:15 UTC1h 15m
2026-07-23 ENY3618 AUS → IND Jul 23, 20:20 UTCJul 23, 21:05 UTC45m
2026-07-23 ENY3618 AUS → IND Jul 23, 18:35 UTCJul 23, 19:20 UTC45m
2026-07-23 ENY4142 ORD → GRR Jul 23, 16:35 UTCJul 23, 17:25 UTC50m
2026-07-23 ENY4142 ORD → GRR Jul 23, 16:30 UTCJul 23, 17:22 UTC52m
2026-07-23 ENY4142 ORD → GRR Jul 23, 14:40 UTCJul 23, 15:35 UTC55m
2026-07-23 ENY3528 CHS → ORD Jul 23, 01:30 UTCJul 23, 02:15 UTC45m
2026-07-23 ENY3528 CHS → ORD Jul 23, 00:05 UTCJul 23, 00:40 UTC35m
2026-07-22 ENY3860 AUS → MSY Jul 22, 15:10 UTCJul 22, 21:50 UTC6h 40m
2026-07-22 ENY4261 AVL → DFW Jul 22, 11:20 UTCJul 22, 13:20 UTC2h 0m
2026-07-22 ENY4260 DFW → AVL Jul 22, 00:45 UTCJul 22, 02:35 UTC1h 50m
2026-07-22 ENY4260 DFW → AVL Jul 22, 00:42 UTCJul 22, 02:32 UTC1h 50m
2026-07-21 ENY3400 AUS → DFW Jul 21, 22:25 UTCJul 21, 23:10 UTC45m
2026-07-21 ENY3400 AUS → DFW Jul 21, 22:21 UTCJul 21, 23:03 UTC42m
2026-07-21 ENY3400 - Jul 21, 20:50 UTCJul 21, 21:20 UTC30m
2026-07-21 ENY3368 - Jul 21, 18:40 UTCJul 21, 19:10 UTC30m
2026-07-21 ENY3368 ABI → DFW Jul 21, 18:30 UTCJul 21, 19:06 UTC36m
2026-07-21 ENY3368 - Jul 21, 17:10 UTCJul 21, 17:30 UTC20m
2026-07-21 ENY3551 GRK → DFW Jul 21, 15:15 UTCJul 21, 15:55 UTC40m
2026-07-21 ENY3551 GRK → DFW Jul 21, 15:12 UTCJul 21, 15:49 UTC37m
2026-07-21 ENY3551 DFW → GRK Jul 21, 13:50 UTCJul 21, 14:15 UTC25m
2026-07-21 ENY3364 DCA → BTV Jul 21, 11:20 UTCJul 21, 12:10 UTC50m
2026-07-21 ENY3364 DCA → BTV Jul 21, 11:14 UTCJul 21, 12:03 UTC49m
2026-07-21 ENY3692 CLT → LIT Jul 21, 00:50 UTCJul 21, 02:10 UTC1h 20m
2026-07-20 ENY3560 - Jul 20, 21:15 UTCJul 20, 22:00 UTC45m
2026-07-20 ENY3560 - Jul 20, 19:55 UTCJul 20, 20:25 UTC30m

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 N263NN page for operator, model, and routing details .

Mode-S A28B5B frequently asked

What is Mode-S code A28B5B?
A28B5B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N263NN.
Where is Mode-S A28B5B registered?
Mode-S code A28B5B 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 A28B5B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A28B5B, octal 50505533, decimal 10,652,507.
What flights does A28B5B operate?
Mode-S A28B5B has broadcast 20 distinct callsigns, including ENY3820, ENY3560, ENY4142, ENY3844, ENY4039.