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sensors Mode-S transponder

AD4EB4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N957AM · BOEING 737-800 · operated by UMB BANK NA TRUSTEE

Hex
AD4EB4
Octal
53247264
Decimal
11,357,876
Country
US
Tail
N957AM
Type
B738
No current signal · last broadcast Jul 26, 18:50 UTC
Flights observed
333
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:50 UTC

Last known position

Most recent position reported by Mode-S AD4EB4.

Country allocation

The ICAO 24-bit address AD4EB4 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
AMX780 Aeroméxico 7 2026-06-03
AMX702 - 6 2026-07-10
AMX623 - 6 2026-06-17
AMX705 - 5 2026-07-10
AMX672 - 5 2026-06-21
AMX622 - 5 2026-06-17
AMX1639 Aeroméxico 5 2026-06-21
AMX706 - 4 2026-06-27
AMX678 Aeroméxico 4 2026-06-09
AMX671 - 4 2026-06-21
AMX629 - 4 2026-06-25
AMX628 - 4 2026-06-25
AMX338 - 4 2026-07-13
AMX335 - 4 2026-07-07
AMX333 Aeroméxico 4 2026-05-26
AMX1636 Aeroméxico 4 2026-06-10
AMX116 Aeroméxico 4 2026-05-24
AMX019 Aeroméxico 4 2026-04-16
AMX859 - 3 2026-07-16
AMX856 - 3 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AMX1682 MEX → ORD Jul 26, 16:35 UTCJul 26, 18:45 UTC2h 10m
2026-07-22 AMX1689 - Jul 22, 21:40 UTCJul 23, 00:00 UTC2h 20m
2026-07-22 AMX1682 - Jul 22, 16:35 UTCJul 22, 18:45 UTC2h 10m
2026-07-22 AMX313 TGZ → MEX Jul 22, 13:15 UTCJul 22, 14:00 UTC45m
2026-07-20 AMX322 - Jul 20, 03:30 UTCJul 20, 04:15 UTC45m
2026-07-19 AMX1689 - Jul 19, 23:50 UTCJul 20, 00:35 UTC45m
2026-07-19 AMX1689 - Jul 19, 22:20 UTCJul 19, 23:00 UTC40m
2026-07-19 AMX1682 - Jul 19, 17:40 UTCJul 19, 19:55 UTC2h 15m
2026-07-16 AMX859 - Jul 16, 22:49 UTCJul 16, 23:25 UTC35m
2026-07-16 AMX856 - Jul 16, 21:05 UTCJul 16, 21:40 UTC35m
2026-07-16 AMX303 - Jul 16, 18:50 UTCJul 16, 19:20 UTC30m
2026-07-16 AMX300 - Jul 16, 16:49 UTCJul 16, 17:14 UTC25m
2026-07-16 AMX711 - Jul 16, 01:00 UTCJul 16, 01:35 UTC35m
2026-07-15 AMX711 - Jul 15, 22:25 UTCJul 15, 23:15 UTC50m
2026-07-15 AMX711 - Jul 15, 20:30 UTCJul 15, 20:45 UTC15m
2026-07-15 AMX704 - Jul 15, 18:05 UTCJul 15, 18:15 UTC10m
2026-07-15 AMX704 - Jul 15, 16:10 UTCJul 15, 16:25 UTC15m
2026-07-15 AMX101 - Jul 15, 13:20 UTCJul 15, 13:35 UTC15m
2026-07-15 AMX108 - Jul 15, 03:05 UTCJul 15, 12:35 UTC9h 30m
2026-07-14 AMX543 - Jul 14, 21:35 UTCJul 14, 23:25 UTC1h 49m
2026-07-14 AMX524 - Jul 14, 18:15 UTCJul 14, 20:05 UTC1h 50m
2026-07-14 AMX139 - Jul 14, 14:35 UTCJul 14, 14:45 UTC10m
2026-07-14 AMX148 - Jul 14, 03:40 UTCJul 14, 13:50 UTC10h 10m
2026-07-13 AMX339 - Jul 13, 19:55 UTCJul 13, 23:50 UTC3h 55m
2026-07-13 AMX141 - Jul 13, 17:45 UTCJul 13, 18:00 UTC15m
2026-07-13 AMX138 - Jul 13, 13:00 UTCJul 13, 17:05 UTC4h 5m
2026-07-13 AMX338 - Jul 13, 00:20 UTCJul 13, 00:35 UTC15m
2026-07-12 AMX831 - Jul 12, 16:20 UTCJul 12, 20:35 UTC4h 15m
2026-07-12 AMX840 - Jul 12, 02:35 UTCJul 12, 13:45 UTC11h 10m
2026-07-11 AMX319 - Jul 11, 20:05 UTCJul 12, 00:01 UTC3h 55m
2026-07-11 AMX805 - Jul 11, 17:35 UTCJul 11, 18:30 UTC55m
2026-07-11 AMX802 - Jul 11, 14:55 UTCJul 11, 15:40 UTC45m
2026-07-11 AMX1631 - Jul 11, 13:00 UTCJul 11, 13:15 UTC15m
2026-07-11 AMX1640 - Jul 11, 04:40 UTCJul 11, 04:55 UTC15m
2026-07-10 AMX144 - Jul 10, 20:55 UTCJul 11, 01:55 UTC5h 0m
2026-07-10 AMX705 AZP → MEX Jul 10, 18:25 UTCJul 10, 18:35 UTC10m
2026-07-10 AMX705 - Jul 10, 16:20 UTCJul 10, 16:40 UTC20m
2026-07-10 AMX702 - Jul 10, 14:40 UTCJul 10, 14:55 UTC15m
2026-07-10 AMX702 - Jul 10, 12:40 UTCJul 10, 12:55 UTC15m
2026-07-09 AMX341 - Jul 9, 02:45 UTCJul 9, 03:10 UTC25m
2026-07-08 AMX338 - Jul 8, 23:35 UTCJul 8, 23:50 UTC15m
2026-07-08 AMX535 - Jul 8, 20:00 UTCJul 8, 22:00 UTC2h 0m
2026-07-08 AMX516 - Jul 8, 16:30 UTCJul 8, 18:20 UTC1h 50m
2026-07-07 AMX335 - Jul 7, 16:35 UTCJul 7, 20:00 UTC3h 25m
2026-07-07 AMX1631 - Jul 7, 13:15 UTCJul 7, 13:25 UTC10m
2026-07-07 AMX1640 - Jul 7, 04:10 UTCJul 7, 04:25 UTC15m
2026-07-07 AMX811 - Jul 7, 01:40 UTCJul 7, 02:35 UTC55m
2026-07-06 AMX806 - Jul 6, 22:50 UTCJul 6, 23:35 UTC45m
2026-07-06 AMX133 - Jul 6, 20:25 UTCJul 6, 20:40 UTC15m
2026-07-06 AMX128 - Jul 6, 18:00 UTCJul 6, 18:15 UTC15m

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 N957AM page for operator, model, and routing details .

Mode-S AD4EB4 frequently asked

What is Mode-S code AD4EB4?
AD4EB4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N957AM.
Where is Mode-S AD4EB4 registered?
Mode-S code AD4EB4 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 AD4EB4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD4EB4, octal 53247264, decimal 11,357,876.
What flights does AD4EB4 operate?
Mode-S AD4EB4 has broadcast 20 distinct callsigns, including AMX780, AMX702, AMX623, AMX705, AMX672.