Apparatus

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sensors Mode-S transponder

A44DDC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N377AR · BOEING 737-800 · operated by WELLS FARGO TRUST CO NA TRUSTEE

Hex
A44DDC
Octal
51046734
Decimal
10,767,836
Country
US
Tail
N377AR
Type
B738
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
234
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S A44DDC.

Country allocation

The ICAO 24-bit address A44DDC 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
AMX678 - 6 2026-07-09
AMX596 Aeroméxico 5 2026-07-22
AMX838 Aeroméxico 4 2026-05-13
AMX679 - 4 2026-07-10
AMX591 Aeroméxico 4 2026-07-22
AMX551 Aeroméxico 4 2026-07-22
AMX500 Aeroméxico 4 2026-07-22
AMX319 - 4 2026-07-16
AMX821 Aeroméxico 3 2026-05-18
AMX805 - 3 2026-07-09
AMX803 - 3 2026-06-27
AMX802 - 3 2026-07-09
AMX531 - 3 2026-06-22
AMX512 - 3 2026-06-22
AMX353 - 3 2026-06-23
AMX1640 - 3 2026-07-09
AMX1631 - 3 2026-07-09
AMX140 - 3 2026-07-12
AMX105 Aeroméxico 3 2026-06-07
AMX102 Aeroméxico 3 2026-06-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AMX542 MEX → CUN Jul 26, 22:25 UTCJul 26, 23:00 UTC35m
2026-07-26 AMX831 MID → MEX Jul 26, 16:25 UTCJul 26, 20:30 UTC4h 5m
2026-07-26 AMX313 TGZ → MEX Jul 26, 12:50 UTCJul 26, 13:40 UTC50m
2026-07-26 AMX320 MEX → TGZ Jul 26, 01:00 UTCJul 26, 01:40 UTC40m
2026-07-25 AMX809 VSA → MEX Jul 25, 20:50 UTCJul 25, 22:00 UTC1h 10m
2026-07-25 AMX804 MEX → VSA Jul 25, 18:10 UTCJul 25, 18:55 UTC45m
2026-07-25 AMX103 TRC → MEX Jul 25, 16:20 UTCJul 25, 16:30 UTC10m
2026-07-25 AMX100 MEX → TRC Jul 25, 12:20 UTCJul 25, 15:25 UTC3h 5m
2026-07-25 AMX147 CUU → MEX Jul 25, 04:20 UTCJul 25, 04:30 UTC10m
2026-07-24 AMX146 MEX → CUU Jul 24, 23:50 UTCJul 25, 03:35 UTC3h 45m
2026-07-24 AMX535 CUN → MEX Jul 24, 19:45 UTCJul 24, 21:35 UTC1h 50m
2026-07-24 AMX516 MEX → CUN Jul 24, 16:30 UTCJul 24, 18:25 UTC1h 55m
2026-07-24 AMX101 TRC → MEX Jul 24, 13:20 UTCJul 24, 13:35 UTC15m
2026-07-24 AMX108 MEX → TRC Jul 24, 03:15 UTCJul 24, 03:35 UTC20m
2026-07-23 AMX383 SJD → MEX Jul 23, 16:55 UTCJul 23, 21:35 UTC4h 40m
2026-07-23 AMX379 SJD → MEX Jul 23, 14:50 UTCJul 23, 15:00 UTC10m
2026-07-23 MEXSJD - Jul 23, 03:35 UTCJul 23, 03:45 UTC10m
2026-07-22 AMX551 CUN → MEX Jul 22, 23:50 UTCJul 23, 01:45 UTC1h 55m
2026-07-22 AMX596 NLU → CUN Jul 22, 20:20 UTCJul 22, 22:10 UTC1h 50m
2026-07-22 AMX591 CUN → NLU Jul 22, 15:50 UTCJul 22, 17:35 UTC1h 45m
2026-07-22 AMX500 MEX → CUN Jul 22, 12:40 UTCJul 22, 14:30 UTC1h 50m
2026-07-22 AMX341 PVR → MEX Jul 22, 02:45 UTCJul 22, 02:55 UTC10m
2026-07-21 AMX338 - Jul 21, 23:05 UTCJul 21, 23:20 UTC15m
2026-07-21 AMX1637 AGU → MEX Jul 21, 21:20 UTCJul 21, 21:30 UTC10m
2026-07-21 AMX1634 MEX → AGU Jul 21, 18:55 UTCJul 21, 19:10 UTC15m
2026-07-21 AMX312 SXE → MEB Jul 21, 13:50 UTCJul 21, 17:20 UTC3h 30m
2026-07-20 AMX1689 - Jul 20, 21:35 UTCJul 21, 00:00 UTC2h 25m
2026-07-20 AMX1682 - Jul 20, 16:45 UTCJul 20, 18:50 UTC2h 5m
2026-07-20 AMX505 CUN → MEX Jul 20, 12:15 UTCJul 20, 14:00 UTC1h 45m
2026-07-20 AMX558 MEX → CUN Jul 20, 02:25 UTCJul 20, 04:15 UTC1h 50m
2026-07-19 AMX859 VER → MEX Jul 19, 22:55 UTCJul 19, 23:40 UTC45m
2026-07-19 AMX856 MEX → VER Jul 19, 21:05 UTCJul 19, 21:40 UTC35m
2026-07-19 AMX335 - Jul 19, 16:10 UTCJul 19, 19:30 UTC3h 20m
2026-07-19 AMX139 - Jul 19, 14:10 UTCJul 19, 14:20 UTC10m
2026-07-18 AMX146 MEX → CUU Jul 18, 23:45 UTCJul 19, 13:25 UTC13h 40m
2026-07-16 AMX319 - Jul 16, 20:19 UTCJul 17, 00:14 UTC3h 55m
2026-07-16 AMX1455 - Jul 16, 16:49 UTCJul 16, 17:14 UTC25m
2026-07-16 AMX1452 - Jul 16, 14:55 UTCJul 16, 15:14 UTC20m
2026-07-16 AMX307 - Jul 16, 02:55 UTCJul 16, 03:30 UTC35m
2026-07-16 AMX304 - Jul 16, 01:10 UTCJul 16, 01:30 UTC20m
2026-07-15 AMX197 - Jul 15, 22:45 UTCJul 15, 23:25 UTC40m
2026-07-15 AMX197 - Jul 15, 20:15 UTCJul 15, 21:05 UTC50m
2026-07-15 AMX190 - Jul 15, 15:55 UTCJul 15, 18:35 UTC2h 40m
2026-07-15 AMX851 - Jul 15, 12:40 UTCJul 15, 13:15 UTC35m
2026-07-15 AMX866 - Jul 15, 03:45 UTCJul 15, 04:25 UTC40m
2026-07-14 AMX523 - Jul 14, 17:10 UTCJul 14, 19:00 UTC1h 50m
2026-07-14 AMX504 - Jul 14, 14:05 UTCJul 14, 15:55 UTC1h 50m
2026-07-13 AMX128 - Jul 13, 18:00 UTCJul 13, 18:10 UTC10m
2026-07-13 AMX515 CUN → MEX Jul 13, 14:20 UTCJul 13, 16:10 UTC1h 50m
2026-07-12 AMX542 - Jul 12, 22:40 UTCJul 13, 00:25 UTC1h 45m

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 N377AR page for operator, model, and routing details .

Mode-S A44DDC frequently asked

What is Mode-S code A44DDC?
A44DDC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N377AR.
Where is Mode-S A44DDC registered?
Mode-S code A44DDC 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 A44DDC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44DDC, octal 51046734, decimal 10,767,836.
What flights does A44DDC operate?
Mode-S A44DDC has broadcast 20 distinct callsigns, including AMX678, AMX596, AMX838, AMX679, AMX591.