Apparatus

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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 2h ago
Flights observed
158
Distinct callsigns
20
Country
US
Last broadcast
2h ago

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 5 2026-05-05
AMX623 Aeroméxico 5 2026-05-28
AMX622 Aeroméxico 4 2026-05-28
AMX333 Aeroméxico 4 2026-05-26
AMX116 Aeroméxico 4 2026-05-24
AMX019 Aeroméxico 4 2026-04-16
AMX781 Aeroméxico 3 2026-05-05
AMX705 Aeroméxico 3 2026-05-23
AMX702 Aeroméxico 3 2026-05-23
AMX689 Aeroméxico 3 2026-04-28
AMX682 Aeroméxico 3 2026-04-28
AMX824 - 2 2026-04-14
AMX806 Aeroméxico 2 2026-04-30
AMX801 Aeroméxico 2 2026-04-15
AMX713 Aeroméxico 2 2026-05-08
AMX709 Aeroméxico 2 2026-04-24
AMX708 Aeroméxico 2 2026-04-24
AMX706 Aeroméxico 2 2026-05-07
AMX678 Aeroméxico 2 2026-05-29
AMX653 Aeroméxico 2 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AMX679 GUA → MEX May 30, 00:00 UTCMay 30, 01:35 UTC1h 35m
2026-05-29 AMX678 MEX → GUA May 29, 22:35 UTCMay 29, 22:40 UTC5m
2026-05-29 AMX678 MEX → GUA May 29, 21:05 UTCMay 29, 21:50 UTC45m
2026-05-29 AMX141 CUU → MEX May 29, 18:45 UTCMay 29, 18:55 UTC10m
2026-05-29 AMX138 MEX → CUU May 29, 13:45 UTCMay 29, 17:55 UTC4h 10m
2026-05-28 AMX623 SFO → GDL May 28, 19:35 UTCMay 29, 02:50 UTC7h 15m
2026-05-28 AMX622 GDL → SFO May 28, 07:20 UTCMay 28, 17:25 UTC10h 5m
2026-05-27 AMX623 SFO → GDL May 27, 19:10 UTCMay 28, 05:05 UTC9h 55m
2026-05-27 AMX789 SMF → GDL May 27, 07:45 UTCMay 27, 17:20 UTC9h 35m
2026-05-26 AMX788 GDL → SMF May 26, 23:25 UTCMay 27, 05:49 UTC6h 25m
2026-05-26 AMX333 PVR → MEX May 26, 12:50 UTCMay 26, 16:10 UTC3h 20m
2026-05-26 AMX1639 AGU → MEX May 26, 02:00 UTCMay 26, 02:15 UTC15m
2026-05-25 AMX1636 MEX → AGU May 25, 22:34 UTCMay 25, 22:44 UTC10m
2026-05-25 AMX641 BOS → MEX May 25, 14:20 UTCMay 25, 19:54 UTC5h 35m
2026-05-24 AMX640 MEX → BOS May 24, 19:10 UTCMay 24, 23:46 UTC4h 36m
2026-05-24 AMX116 GDL → TIJ May 24, 17:00 UTCMay 24, 17:10 UTC10m
2026-05-24 AMX116 GDL → TIJ May 24, 15:15 UTCMay 24, 15:35 UTC20m
2026-05-24 AMX119 TIJ → GDL May 24, 01:10 UTCMay 24, 03:20 UTC2h 10m
2026-05-23 AMX1541 SLP → MEX May 23, 22:30 UTCMay 23, 23:20 UTC50m
2026-05-23 AMX1536 MEX → SLP May 23, 20:10 UTCMay 23, 20:20 UTC10m
2026-05-23 AMX705 HMO → MEX May 23, 18:10 UTCMay 23, 18:25 UTC15m
2026-05-23 AMX702 MEX → HMO May 23, 12:50 UTCMay 23, 13:05 UTC15m
2026-05-23 AMX149 CUU → MEX May 23, 05:15 UTCMay 23, 05:25 UTC10m
2026-05-23 AMX146 MEX → CUU May 23, 00:30 UTCMay 23, 04:30 UTC3h 59m
2026-05-22 AMX353 MZT → MEX May 22, 22:15 UTCMay 22, 22:55 UTC40m
2026-05-22 AMX350 MEX → MZT May 22, 18:40 UTCMay 22, 18:50 UTC10m
2026-05-22 AMX411 MIA → CUN May 22, 12:15 UTCMay 22, 17:00 UTC4h 45m
2026-05-21 AMX410 MEX → EWR May 21, 21:20 UTCMay 22, 02:00 UTC4h 40m
2026-05-21 AMX383 SJD → MEX May 21, 19:10 UTCMay 21, 19:20 UTC10m
2026-05-20 AMX551 CUN → MEX May 20, 23:55 UTCMay 21, 02:00 UTC2h 5m
2026-05-20 AMX596 NLU → CUN May 20, 20:35 UTCMay 20, 22:20 UTC1h 45m
2026-05-20 AMX591 CUN → NLU May 20, 16:35 UTCMay 20, 18:25 UTC1h 50m
2026-05-20 AMX500 MEX → CUN May 20, 13:35 UTCMay 20, 15:20 UTC1h 45m
2026-05-19 AMX813 VSA → MEX May 19, 04:20 UTCMay 19, 05:30 UTC1h 10m
2026-05-19 AMX810 MEX → VSA May 19, 02:05 UTCMay 19, 02:50 UTC45m
2026-05-18 AMX385 SJD → MEX May 18, 23:10 UTCMay 19, 00:00 UTC50m
2026-05-18 AMX382 MEX → SJD May 18, 18:50 UTCMay 18, 19:00 UTC10m
2026-05-18 AMX162 MEX → CUL May 18, 12:35 UTCMay 18, 12:45 UTC10m
2026-05-18 AMX341 PVR → MEX May 18, 03:10 UTCMay 18, 03:35 UTC25m
2026-05-18 AMX338 MEX → PVR May 18, 00:10 UTCMay 18, 00:20 UTC10m
2026-05-17 AMX1637 AGU → MEX May 17, 22:05 UTCMay 17, 22:15 UTC10m
2026-05-17 AMX1634 MEX → AGU May 17, 19:01 UTCMay 17, 19:10 UTC10m
2026-05-17 AMX1741 TPA → MEX May 17, 13:31 UTCMay 17, 16:20 UTC2h 50m
2026-05-16 AMX1740 MEX → TPA May 16, 20:45 UTCMay 16, 23:15 UTC2h 30m
2026-05-16 AMX705 HMO → MEX May 16, 18:20 UTCMay 16, 18:30 UTC10m
2026-05-16 AMX705 HMO → MEX May 16, 16:20 UTCMay 16, 16:35 UTC15m
2026-05-16 AMX702 MEX → HMO May 16, 14:55 UTCMay 16, 15:10 UTC15m
2026-05-16 AMX702 MEX → HMO May 16, 12:55 UTCMay 16, 13:11 UTC15m
2026-05-15 AMX671 GUA → MEX May 15, 18:40 UTCMay 15, 20:15 UTC1h 35m
2026-05-15 AMX672 MEX → GUA May 15, 15:05 UTCMay 15, 16:35 UTC1h 30m

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 2h ago.
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, AMX623, AMX622, AMX333, AMX116.