Apparatus

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sensors Mode-S transponder

040104

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-ASJ · BOEING 737-800

Hex
040104
Octal
01000404
Decimal
262,404
Country
ET
Tail
ET-ASJ
Type
B738
No current signal · last broadcast 2d ago
Flights observed
34
Distinct callsigns
14
Country
ET
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 040104.

Country allocation

The ICAO 24-bit address 040104 falls within the block assigned to Ethiopia (ET) by ICAO Annex 10, Volume III. Every aircraft registered in Ethiopia 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 14 distinct

Callsign Airline Flights Last seen
ETH431 Ethiopian Airlines 11 2026-06-06
ETH430 Ethiopian Airlines 3 2026-06-05
ETH415 Ethiopian Airlines 3 2026-05-30
ETH404 Ethiopian Airlines 3 2026-05-29
ETH881 Ethiopian Airlines 2 2026-05-01
ETH428 Ethiopian Airlines 2 2026-06-05
ETH407 Ethiopian Airlines 2 2026-05-10
ETH406 Ethiopian Airlines 2 2026-05-09
ETH916 Ethiopian Airlines 1 2026-06-01
ETH890 Ethiopian Airlines 1 2026-05-07
ETH444 - 1 2026-05-12
ETH429 Ethiopian Airlines 1 2026-06-06
ETH419 Ethiopian Airlines 1 2026-05-25
ETH418 Ethiopian Airlines 1 2026-05-25

Recent flights last 34

DateFlightRouteTakeoffLandingDuration
2026-06-06 ETH431 AMM → ADD Jun 6, 13:25 UTCJun 6, 13:39 UTC15m
2026-06-06 ETH429 AMM → ADD Jun 6, 00:30 UTCJun 6, 11:00 UTC10h 30m
2026-06-05 ETH428 ADD → AMM Jun 5, 22:50 UTCJun 5, 23:00 UTC10m
2026-06-05 ETH431 AMM → ADD Jun 5, 13:15 UTCJun 5, 13:30 UTC15m
2026-06-05 ETH430 ADD → AMM Jun 5, 11:15 UTCJun 5, 11:35 UTC20m
2026-06-04 ETH431 AMM → ADD Jun 4, 13:20 UTCJun 4, 13:35 UTC15m
2026-06-04 ETH430 ADD → AMM Jun 4, 10:25 UTCJun 4, 10:45 UTC20m
2026-06-01 ETH916 COO → ADD Jun 1, 13:50 UTCJun 1, 14:00 UTC10m
2026-05-31 ETH428 ADD → AMM May 31, 23:10 UTCMay 31, 23:20 UTC10m
2026-05-30 ETH415 TLV → ADD May 30, 05:05 UTCMay 30, 05:30 UTC25m
2026-05-29 ETH404 ADD → TLV May 29, 07:55 UTCMay 30, 03:00 UTC19h 5m
2026-05-27 ETH415 TLV → ADD May 27, 05:09 UTCMay 27, 05:35 UTC25m
2026-05-27 ETH404 ADD → TLV May 27, 02:59 UTCMay 27, 03:09 UTC10m
2026-05-25 ETH419 TLV → ADD May 25, 13:15 UTCMay 25, 13:40 UTC25m
2026-05-25 ETH418 ADD → TLV May 25, 11:15 UTCMay 25, 11:50 UTC35m
2026-05-16 ETH415 TLV → ADD May 16, 04:55 UTCMay 16, 05:15 UTC20m
2026-05-16 ETH404 ADD → TLV May 16, 02:35 UTCMay 16, 03:10 UTC35m
2026-05-12 ETH444 - May 12, 05:15 UTCMay 12, 05:25 UTC10m
2026-05-10 ETH407 BEY → ADD May 10, 12:49 UTCMay 10, 13:49 UTC1h 0m
2026-05-09 ETH406 ADD → BEY May 9, 20:44 UTCMay 10, 11:30 UTC14h 45m
2026-05-07 ETH890 LUN → ADD May 7, 02:55 UTCMay 7, 08:15 UTC5h 20m
2026-05-04 ETH407 BEY → ADD May 4, 13:35 UTCMay 4, 14:40 UTC1h 5m
2026-05-04 ETH406 ADD → BEY May 4, 10:40 UTCMay 4, 11:30 UTC50m
2026-05-01 ETH881 BEW → ADD May 1, 08:20 UTCMay 1, 16:10 UTC7h 50m
2026-04-27 ETH431 AMM → ADD Apr 27, 13:15 UTCApr 28, 10:35 UTC21h 20m
2026-04-27 ETH431 AMM → ADD Apr 27, 10:35 UTCApr 27, 13:20 UTC2h 45m
2026-04-26 ETH431 AMM → ADD Apr 26, 13:35 UTCApr 27, 10:40 UTC21h 5m
2026-04-26 ETH431 AMM → ADD Apr 26, 10:50 UTCApr 26, 13:40 UTC2h 50m
2026-04-25 ETH431 AMM → ADD Apr 25, 13:20 UTCApr 26, 10:50 UTC21h 30m
2026-04-24 ETH881 BEW → ADD Apr 24, 08:10 UTCApr 24, 15:45 UTC7h 35m
2026-04-22 ETH431 AMM → ADD Apr 22, 13:30 UTCApr 23, 10:45 UTC21h 15m
2026-04-21 ETH430 ADD → AMM Apr 21, 13:10 UTCApr 22, 11:00 UTC21h 50m
2026-04-19 ETH431 AMM → ADD Apr 19, 13:45 UTCApr 19, 13:55 UTC10m
2026-04-18 ETH431 - Apr 18, 13:30 UTCApr 18, 13:40 UTC10m

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 ET-ASJ page for operator, model, and routing details .

Mode-S 040104 frequently asked

What is Mode-S code 040104?
040104 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-ASJ.
Where is Mode-S 040104 registered?
Mode-S code 040104 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040104 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040104, octal 01000404, decimal 262,404.
What flights does 040104 operate?
Mode-S 040104 has broadcast 14 distinct callsigns, including ETH431, ETH430, ETH415, ETH404, ETH881.