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sensors Mode-S transponder

AA1DC2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N751AB · operated by WILMINGTON TRUST CO TRUSTEE

Hex
AA1DC2
Octal
52416702
Decimal
11,148,738
Country
US
Tail
N751AB
Type
E170
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
892
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S AA1DC2.

Country allocation

The ICAO 24-bit address AA1DC2 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
ENY3553 Envoy Air 17 2026-07-25
ENY3489 - 17 2026-07-24
ENY3608 - 14 2026-06-19
ENY3739 - 12 2026-07-16
ENY3846 - 10 2026-07-10
ENY3546 Envoy Air 10 2026-07-26
ENY3477 Envoy Air 10 2026-07-22
ENY4330 Envoy Air 9 2026-07-21
ENY4213 Envoy Air 9 2026-05-20
ENY3839 - 9 2026-07-15
ENY4162 Envoy Air 8 2026-06-05
ENY3696 - 8 2026-07-13
ENY3407 - 8 2026-06-21
ENY3391 - 8 2026-07-22
ENY4328 Envoy Air 7 2026-07-22
ENY4103 - 7 2026-07-25
ENY4094 - 7 2026-06-21
ENY4062 - 7 2026-07-19
ENY3909 Envoy Air 7 2026-07-24
ENY3800 - 7 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ENY3398 ELP → ORD Jul 26, 19:45 UTCJul 26, 21:05 UTC1h 20m
2026-07-26 ENY3398 ELP → ORD Jul 26, 17:45 UTCJul 26, 18:50 UTC1h 5m
2026-07-26 ENY3546 ORD → MCI Jul 26, 14:50 UTCJul 26, 15:35 UTC45m
2026-07-26 ENY3546 ORD → MCI Jul 26, 13:05 UTCJul 26, 13:45 UTC40m
2026-07-26 ENY3672 IAH → ORD Jul 26, 10:20 UTCJul 26, 11:20 UTC1h 0m
2026-07-26 ENY3684 DFW → BHM Jul 26, 01:55 UTCJul 26, 02:50 UTC55m
2026-07-25 ENY3645 ORD → IND Jul 25, 23:20 UTCJul 26, 00:05 UTC45m
2026-07-25 ENY3645 ORD → IND Jul 25, 21:40 UTCJul 25, 22:25 UTC45m
2026-07-25 ENY3553 ORD → ALB Jul 25, 19:00 UTCJul 25, 19:25 UTC25m
2026-07-25 ENY3553 ORD → ALB Jul 25, 18:55 UTCJul 25, 19:25 UTC30m
2026-07-25 ENY3553 ORD → ALB Jul 25, 17:20 UTCJul 25, 17:55 UTC35m
2026-07-25 ENY4103 - Jul 25, 15:35 UTCJul 25, 16:15 UTC40m
2026-07-25 ENY4103 - Jul 25, 13:50 UTCJul 25, 14:35 UTC45m
2026-07-25 ENY3421 CVG → RDU Jul 25, 11:15 UTCJul 25, 11:50 UTC35m
2026-07-25 ENY3421 CVG → RDU Jul 25, 11:11 UTCJul 25, 11:46 UTC35m
2026-07-25 ENY3694 ORD → CMI Jul 25, 01:14 UTCJul 25, 01:41 UTC27m
2026-07-25 ENY3694 ORD → CMI Jul 25, 01:15 UTCJul 25, 01:45 UTC30m
2026-07-24 ENY3645 ORD → IND Jul 24, 22:55 UTCJul 25, 00:05 UTC1h 10m
2026-07-24 ENY3645 ORD → IND Jul 24, 21:20 UTCJul 24, 22:00 UTC40m
2026-07-24 ENY3553 ORD → ALB Jul 24, 18:45 UTCJul 24, 19:20 UTC35m
2026-07-24 ENY3553 ORD → ALB Jul 24, 18:40 UTCJul 24, 19:11 UTC31m
2026-07-24 ENY3553 ORD → ALB Jul 24, 17:20 UTCJul 24, 17:50 UTC30m
2026-07-24 ENY3489 - Jul 24, 14:20 UTCJul 24, 15:05 UTC45m
2026-07-24 ENY3489 - Jul 24, 12:40 UTCJul 24, 13:25 UTC45m
2026-07-24 ENY3909 TYS → ORD Jul 24, 09:45 UTCJul 24, 10:20 UTC35m
2026-07-24 ENY3909 TYS → ORD Jul 24, 09:39 UTCJul 24, 10:25 UTC46m
2026-07-24 ENY3910 CVG → ORD Jul 24, 03:20 UTCJul 24, 03:55 UTC35m
2026-07-24 ENY3490 AVL → DFW Jul 24, 00:05 UTCJul 24, 01:05 UTC1h 0m
2026-07-23 ENY3490 AVL → DFW Jul 23, 22:40 UTCJul 23, 23:15 UTC35m
2026-07-23 ENY3553 ORD → ALB Jul 23, 18:50 UTCJul 23, 19:40 UTC50m
2026-07-23 ENY3553 ORD → ALB Jul 23, 18:49 UTCJul 23, 19:18 UTC29m
2026-07-23 ENY3553 ORD → ALB Jul 23, 17:35 UTCJul 23, 18:05 UTC30m
2026-07-23 ENY3489 CVG → ORD Jul 23, 15:40 UTCJul 23, 16:30 UTC50m
2026-07-23 ENY3489 CVG → ORD Jul 23, 15:39 UTCJul 23, 16:30 UTC51m
2026-07-23 ENY3489 - Jul 23, 12:40 UTCJul 23, 13:20 UTC40m
2026-07-23 ENY3489 ORD → CVG Jul 23, 12:35 UTCJul 23, 13:19 UTC44m
2026-07-23 ENY3765 ORD → ROC Jul 23, 09:50 UTCJul 23, 10:35 UTC45m
2026-07-23 ENY3765 ORD → ROC Jul 23, 09:46 UTCJul 23, 10:30 UTC44m
2026-07-23 ENY3753 TYS → DFW Jul 23, 03:45 UTCJul 23, 04:10 UTC25m
2026-07-23 ENY4144 PHX → STS Jul 23, 01:05 UTCJul 23, 01:50 UTC45m
2026-07-22 ENY4144 PHX → STS Jul 22, 23:20 UTCJul 23, 00:10 UTC50m
2026-07-22 ENY3391 - Jul 22, 18:40 UTCJul 22, 19:30 UTC50m
2026-07-22 ENY3391 ATW → ORD Jul 22, 18:37 UTCJul 22, 19:13 UTC36m
2026-07-22 ENY3391 - Jul 22, 16:55 UTCJul 22, 17:30 UTC35m
2026-07-22 ENY3546 ORD → MCI Jul 22, 14:55 UTCJul 22, 15:40 UTC45m
2026-07-22 ENY3546 ORD → MCI Jul 22, 13:25 UTCJul 22, 14:00 UTC35m
2026-07-22 ENY4328 DFW → SAT Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 ENY4331 MHH → CLT Jul 22, 04:40 UTCJul 22, 05:15 UTC35m
2026-07-22 ENY3477 DFW → MSN Jul 22, 01:40 UTCJul 22, 02:15 UTC35m
2026-07-22 ENY3477 DFW → MSN Jul 22, 00:15 UTCJul 22, 00:45 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 N751AB page for operator, model, and routing details .

Mode-S AA1DC2 frequently asked

What is Mode-S code AA1DC2?
AA1DC2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N751AB.
Where is Mode-S AA1DC2 registered?
Mode-S code AA1DC2 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 AA1DC2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA1DC2, octal 52416702, decimal 11,148,738.
What flights does AA1DC2 operate?
Mode-S AA1DC2 has broadcast 20 distinct callsigns, including ENY3553, ENY3489, ENY3608, ENY3739, ENY3846.