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sensors Mode-S transponder

A19E61

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N203NN · EMBRAER ERJ-170-200 (long wing) · operated by AMERICAN AIRLINES INC

Hex
A19E61
Octal
50317141
Decimal
10,591,841
Country
US
Tail
N203NN
Type
E75L
No current signal · last broadcast Jul 26, 22:10 UTC
Flights observed
709
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:10 UTC

Last known position

Most recent position reported by Mode-S A19E61.

Country allocation

The ICAO 24-bit address A19E61 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
ENY4149 Envoy Air 9 2026-06-01
ENY3820 Envoy Air 8 2026-07-23
ENY4060 - 7 2026-07-16
ENY3729 - 7 2026-07-21
ENY3470 - 7 2026-07-01
ENY3577 - 6 2026-06-22
ENY4225 Envoy Air 5 2026-05-04
ENY4214 Envoy Air 5 2026-07-26
ENY4190 Envoy Air 5 2026-05-10
ENY4143 Envoy Air 5 2026-04-27
ENY4072 Envoy Air 5 2026-07-26
ENY3871 - 5 2026-07-17
ENY3630 Envoy Air 5 2026-06-04
ENY3566 Envoy Air 5 2026-07-23
ENY3562 - 5 2026-07-17
ENY3560 - 5 2026-07-18
ENY3497 Envoy Air 5 2026-06-18
ENY3350 Envoy Air 5 2026-07-24
ENY4212 Envoy Air 4 2026-05-08
ENY4176 Envoy Air 4 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY4072 CZM → MIA Jul 26, 21:40 UTCJul 26, 22:10 UTC30m
2026-07-26 ENY4072 CZM → MIA Jul 26, 19:15 UTCJul 26, 20:40 UTC1h 25m
2026-07-26 ENY4214 ORD → BOS Jul 26, 16:00 UTCJul 26, 16:20 UTC20m
2026-07-26 ENY4214 ORD → BOS Jul 26, 13:50 UTCJul 26, 14:10 UTC20m
2026-07-26 ENY3405 DCA → BGR Jul 26, 10:50 UTCJul 26, 12:20 UTC1h 30m
2026-07-26 ENY4042 DCA → CMH Jul 26, 01:00 UTCJul 26, 02:30 UTC1h 30m
2026-07-25 ENY3774 CRP → DFW Jul 25, 16:40 UTCJul 25, 23:25 UTC6h 45m
2026-07-25 ENY3755 MTY → MIA Jul 25, 15:25 UTCJul 25, 15:40 UTC15m
2026-07-25 ENY3755 MTY → MIA Jul 25, 12:21 UTCJul 25, 15:10 UTC2h 49m
2026-07-25 ENY3755 MTY → MIA Jul 25, 12:25 UTCJul 25, 15:40 UTC3h 15m
2026-07-24 ENY3756 MIA → MTY Jul 24, 23:25 UTCJul 25, 02:05 UTC2h 40m
2026-07-24 ENY3350 BDL → ORD Jul 24, 19:05 UTCJul 24, 21:35 UTC2h 30m
2026-07-24 ENY3350 BDL → ORD Jul 24, 18:57 UTCJul 24, 21:30 UTC2h 33m
2026-07-24 ENY3989 ORD → CVG Jul 24, 15:40 UTCJul 24, 17:50 UTC2h 10m
2026-07-24 ENY3679 - Jul 24, 11:30 UTCJul 24, 14:10 UTC2h 40m
2026-07-24 ENY3680 ORD → MSN Jul 24, 01:35 UTCJul 24, 04:10 UTC2h 35m
2026-07-24 ENY3680 ORD → MSN Jul 24, 01:31 UTCJul 24, 04:05 UTC2h 34m
2026-07-23 ENY3566 ORD → SYR Jul 23, 21:40 UTCJul 23, 22:45 UTC1h 5m
2026-07-23 ENY3566 ORD → SYR Jul 23, 19:35 UTCJul 23, 20:35 UTC1h 0m
2026-07-23 ENY3518 MLU → DFW Jul 23, 18:00 UTCJul 23, 18:20 UTC20m
2026-07-23 ENY3518 MLU → DFW Jul 23, 16:25 UTCJul 23, 16:40 UTC15m
2026-07-23 ENY3820 CVG → DCA Jul 23, 13:45 UTCJul 23, 14:45 UTC1h 0m
2026-07-23 ENY3820 CVG → DCA Jul 23, 11:45 UTCJul 23, 12:45 UTC1h 0m
2026-07-23 ENY355B - Jul 23, 01:05 UTCJul 23, 02:35 UTC1h 30m
2026-07-22 ENY3557 CMH → DFW Jul 22, 22:00 UTCJul 22, 23:55 UTC1h 55m
2026-07-22 ENY3469 ORD → DSM Jul 22, 17:45 UTCJul 22, 19:05 UTC1h 20m
2026-07-22 ENY3469 ORD → DSM Jul 22, 17:40 UTCJul 22, 19:06 UTC1h 26m
2026-07-22 ENY3469 ORD → DSM Jul 22, 15:20 UTCJul 22, 16:45 UTC1h 25m
2026-07-22 ENY4066 RNO → PHX Jul 22, 11:10 UTCJul 22, 13:15 UTC2h 5m
2026-07-22 ENY4066 RNO → PHX Jul 22, 11:04 UTCJul 22, 13:05 UTC2h 1m
2026-07-22 ENY4064 - Jul 22, 01:45 UTCJul 22, 03:45 UTC2h 0m
2026-07-22 ENY3653 LAN → ORD Jul 22, 00:00 UTCJul 22, 00:50 UTC50m
2026-07-21 ENY3653 LAN → ORD Jul 21, 22:25 UTCJul 21, 23:10 UTC45m
2026-07-21 ENY3847 ORD → GSP Jul 21, 19:55 UTCJul 21, 20:45 UTC50m
2026-07-21 ENY3847 ORD → GSP Jul 21, 17:50 UTCJul 21, 18:35 UTC45m
2026-07-21 ENY3616 - Jul 21, 15:35 UTCJul 21, 16:20 UTC45m
2026-07-21 ENY3616 - Jul 21, 13:45 UTCJul 21, 14:30 UTC45m
2026-07-21 ENY3930 - Jul 21, 11:15 UTCJul 21, 12:10 UTC55m
2026-07-21 ENY3930 LCH → DFW Jul 21, 11:12 UTCJul 21, 12:08 UTC56m
2026-07-21 ENY3900 EWR → ORD Jul 21, 02:40 UTCJul 21, 03:25 UTC45m
2026-07-21 ENY3900 EWR → ORD Jul 21, 02:40 UTCJul 21, 03:29 UTC49m
2026-07-21 ENY3729 - Jul 21, 00:25 UTCJul 21, 01:00 UTC35m
2026-07-21 ENY3729 OKC → DFW Jul 21, 00:24 UTCJul 21, 00:55 UTC31m
2026-07-20 ENY3729 DFW → OKC Jul 20, 22:55 UTCJul 20, 23:40 UTC45m
2026-07-20 ENY3547 - Jul 20, 20:20 UTCJul 20, 20:55 UTC35m
2026-07-20 ENY3547 - Jul 20, 18:50 UTCJul 20, 19:15 UTC25m
2026-07-20 ENY3651 DCA → ALB Jul 20, 16:55 UTCJul 20, 17:45 UTC50m
2026-07-20 ENY3651 DCA → ALB Jul 20, 15:10 UTCJul 20, 15:55 UTC45m
2026-07-20 ENY3641 - Jul 20, 13:10 UTCJul 20, 13:55 UTC45m
2026-07-20 ENY3692 CLT → LIT Jul 20, 01:15 UTCJul 20, 02:40 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 N203NN page for operator, model, and routing details .

Mode-S A19E61 frequently asked

What is Mode-S code A19E61?
A19E61 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N203NN.
Where is Mode-S A19E61 registered?
Mode-S code A19E61 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 A19E61 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A19E61, octal 50317141, decimal 10,591,841.
What flights does A19E61 operate?
Mode-S A19E61 has broadcast 20 distinct callsigns, including ENY4149, ENY3820, ENY4060, ENY3729, ENY3470.