Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

0D121D

ICAO 24-bit transponder address · allocated to Mexico

Currently assigned to XA-OTB · BOEING 737 MAX 8

Hex
0D121D
Octal
03211035
Decimal
856,605
Country
MX
Tail
XA-OTB
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
178
Distinct callsigns
20
Country
MX
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 0D121D.

Country allocation

The ICAO 24-bit address 0D121D falls within the block assigned to Mexico (MX) by ICAO Annex 10, Volume III. Every aircraft registered in Mexico 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
AMX680 Aeroméxico 6 2026-05-30
AMX421 Aeroméxico 6 2026-05-26
AMX681 Aeroméxico 5 2026-05-17
AMX481 Aeroméxico 5 2026-05-07
AMX171 Aeroméxico 5 2026-04-21
AMX710 Aeroméxico 4 2026-05-15
AMX644 Aeroméxico 4 2026-05-27
AMX512 Aeroméxico 4 2026-05-25
AMX484 Aeroméxico 4 2026-05-06
AMX420 Aeroméxico 4 2026-05-26
AMX188 Aeroméxico 4 2026-04-21
AMX687 Aeroméxico 3 2026-05-15
AMX686 Aeroméxico 3 2026-05-15
AMX645 Aeroméxico 3 2026-05-28
AMX531 Aeroméxico 3 2026-05-25
AMX179 Aeroméxico 3 2026-04-29
AMX172 Aeroméxico 3 2026-04-29
AMX792 Aeroméxico 2 2026-05-18
AMX715 Aeroméxico 2 2026-05-15
AMX714 Aeroméxico 2 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 AMX680 MEX → YUL May 30, 06:50 UTCMay 30, 11:15 UTC4h 25m
2026-05-29 AMX403 JFK → MEX May 29, 22:25 UTCMay 30, 02:50 UTC4h 25m
2026-05-29 AMX402 MEX → JFK May 29, 15:20 UTCMay 29, 19:50 UTC4h 30m
2026-05-28 AMX403 JFK → MEX May 28, 23:00 UTCMay 29, 03:50 UTC4h 50m
2026-05-28 AMX402 MEX → JFK May 28, 15:40 UTCMay 28, 20:15 UTC4h 35m
2026-05-28 AMX903 MTY → MEX May 28, 12:45 UTCMay 28, 13:45 UTC1h 0m
2026-05-28 AMX956 MEX → MTY May 28, 02:45 UTCMay 28, 04:00 UTC1h 15m
2026-05-28 AMX645 LAX → MEX May 28, 00:05 UTCMay 28, 00:15 UTC10m
2026-05-27 AMX645 LAX → MEX May 27, 21:25 UTCMay 27, 22:20 UTC55m
2026-05-27 AMX644 MEX → LAX May 27, 18:15 UTCMay 27, 19:25 UTC1h 10m
2026-05-27 AMX644 MEX → LAX May 27, 15:40 UTCMay 27, 15:50 UTC10m
2026-05-26 AMX421 MIA → MEX May 26, 22:59 UTCMay 27, 01:54 UTC2h 55m
2026-05-26 AMX420 MEX → MIA May 26, 18:30 UTCMay 26, 21:09 UTC2h 40m
2026-05-26 AMX191 MXL → MEX May 26, 15:39 UTCMay 26, 15:49 UTC10m
2026-05-26 AMX191 MXL → MEX May 26, 13:24 UTCMay 26, 13:45 UTC20m
2026-05-26 AMX198 MEX → MXL May 26, 07:24 UTCMay 26, 07:49 UTC25m
2026-05-26 AMX198 MEX → MXL May 26, 04:50 UTCMay 26, 05:05 UTC15m
2026-05-25 AMX834 MEX → MID May 25, 22:34 UTCMay 26, 02:55 UTC4h 20m
2026-05-25 AMX531 CUN → MEX May 25, 18:50 UTCMay 25, 20:50 UTC1h 59m
2026-05-25 AMX512 MEX → CUN May 25, 15:35 UTCMay 25, 17:20 UTC1h 45m
2026-05-25 AMX108 MEX → TRC May 25, 03:10 UTCMay 25, 03:20 UTC10m
2026-05-24 AMX339 PVR → MEX May 24, 23:15 UTCMay 24, 23:46 UTC31m
2026-05-24 AMX336 MEX → PVR May 24, 20:10 UTCMay 24, 20:20 UTC10m
2026-05-24 AMX609 PHL → MEX May 24, 13:50 UTCMay 24, 18:15 UTC4h 25m
2026-05-23 AMX608 MEX → PHL May 23, 19:25 UTCMay 23, 23:40 UTC4h 15m
2026-05-23 AMX825 MID → MEX May 23, 12:35 UTCMay 23, 16:50 UTC4h 15m
2026-05-23 AMX395 HUX → MEX May 23, 04:30 UTCMay 23, 07:15 UTC2h 45m
2026-05-22 AMX441 MCO → MEX May 22, 18:20 UTCMay 22, 21:55 UTC3h 35m
2026-05-22 AMX440 MEX → MCO May 22, 13:25 UTCMay 22, 16:05 UTC2h 40m
2026-05-22 AMX471 IAH → MEX May 22, 03:15 UTCMay 22, 05:05 UTC1h 50m
2026-05-21 AMX470 MEX → IAH May 21, 22:35 UTCMay 22, 00:45 UTC2h 10m
2026-05-21 AMX693 YYZ → MEX May 21, 15:20 UTCMay 21, 20:35 UTC5h 15m
2026-05-21 AMX692 MEX → YYZ May 21, 06:00 UTCMay 21, 10:00 UTC4h 0m
2026-05-21 AMX321 TGZ → MEX May 21, 01:00 UTCMay 21, 02:05 UTC1h 5m
2026-05-20 AMX318 MEX → TGZ May 20, 21:55 UTCMay 20, 22:45 UTC50m
2026-05-20 AMX527 CUN → MEX May 20, 17:55 UTCMay 20, 19:45 UTC1h 50m
2026-05-20 AMX508 MEX → CUN May 20, 14:30 UTCMay 20, 16:20 UTC1h 50m
2026-05-20 AMX149 CUU → MEX May 20, 05:30 UTCMay 20, 05:35 UTC5m
2026-05-20 AMX146 MEX → CUU May 20, 00:55 UTCMay 20, 04:35 UTC3h 40m
2026-05-19 AMX239 GDL → MEX May 19, 22:30 UTCMay 19, 22:55 UTC25m
2026-05-19 AMX793 SLC → GDL May 19, 15:40 UTCMay 19, 17:35 UTC1h 55m
2026-05-18 AMX792 GDL → SLC May 18, 20:05 UTCMay 19, 01:25 UTC5h 20m
2026-05-18 AMX829 MID → MEX May 18, 13:55 UTCMay 18, 18:20 UTC4h 25m
2026-05-18 AMX120 CJS → MEX May 18, 04:51 UTCMay 18, 04:55 UTC5m
2026-05-18 AMX120 CJS → MEX May 18, 02:35 UTCMay 18, 03:50 UTC1h 15m
2026-05-17 AMX117 MEX → CJS May 17, 23:05 UTCMay 18, 01:25 UTC2h 20m
2026-05-17 AMX681 YUL → MEX May 17, 15:25 UTCMay 17, 20:25 UTC5h 0m
2026-05-17 AMX680 MEX → YUL May 17, 06:45 UTCMay 17, 11:20 UTC4h 35m
2026-05-16 AMX645 LAX → MEX May 16, 21:25 UTCMay 17, 00:45 UTC3h 20m
2026-05-16 AMX644 MEX → LAX May 16, 17:20 UTCMay 16, 19:00 UTC1h 40m

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 XA-OTB page for operator, model, and routing details .

Mode-S 0D121D frequently asked

What is Mode-S code 0D121D?
0D121D is an ICAO 24-bit transponder address. Allocated to Mexico. Assigned to XA-OTB.
Where is Mode-S 0D121D registered?
Mode-S code 0D121D is allocated to Mexico (MX). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 0D121D broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 0D121D, octal 03211035, decimal 856,605.
What flights does 0D121D operate?
Mode-S 0D121D has broadcast 20 distinct callsigns, including AMX680, AMX421, AMX681, AMX481, AMX171.