Apparatus

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sensors Mode-S transponder

040203

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-AYM · AIRBUS A-350-900

Hex
040203
Octal
01001003
Decimal
262,659
Country
ET
Tail
ET-AYM
Type
A359
No current signal · last broadcast 6h ago
Flights observed
79
Distinct callsigns
20
Country
ET
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 040203.

Country allocation

The ICAO 24-bit address 040203 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 20 distinct

Callsign Airline Flights Last seen
ETH506 Ethiopian Airlines 9 2026-04-27
ETH735 Ethiopian Airlines 7 2026-05-29
ETH734 Ethiopian Airlines 6 2026-05-29
ETH706 Ethiopian Airlines 6 2026-05-22
ETH707 Ethiopian Airlines 5 2026-05-23
ETH685 Ethiopian Airlines 5 2026-05-18
ETH552 Ethiopian Airlines 5 2026-05-10
ETH507 Ethiopian Airlines 5 2026-04-28
ETH726 Ethiopian Airlines 4 2026-04-18
ETH604 Ethiopian Airlines 3 2026-05-21
ETH955 Ethiopian Airlines 2 2026-05-05
ETH750 Ethiopian Airlines 2 2026-04-29
ETH737 Ethiopian Airlines 2 2026-04-20
ETH736 Ethiopian Airlines 2 2026-04-20
ETH727 Ethiopian Airlines 2 2026-04-18
ETH553 Ethiopian Airlines 2 2026-05-10
ETH500 Ethiopian Airlines 2 2026-05-04
ETH925 Ethiopian Airlines 1 2026-05-21
ETH809 Ethiopian Airlines 1 2026-04-15
ETH808 Ethiopian Airlines 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ETH735 CDG → ADD May 29, 20:25 UTCMay 29, 23:15 UTC2h 50m
2026-05-29 ETH734 ADD → CDG May 29, 01:15 UTCMay 29, 04:40 UTC3h 25m
2026-05-27 ETH735 CDG → ADD May 27, 19:55 UTCMay 27, 22:50 UTC2h 55m
2026-05-27 ETH734 ADD → CDG May 27, 01:14 UTCMay 27, 04:34 UTC3h 20m
2026-05-25 ETH735 CDG → ADD May 25, 19:59 UTCMay 25, 23:14 UTC3h 15m
2026-05-25 ETH734 ADD → CDG May 25, 01:55 UTCMay 25, 04:45 UTC2h 50m
2026-05-23 ETH707 FRA → ADD May 23, 20:30 UTCMay 23, 23:35 UTC3h 5m
2026-05-22 ETH706 ADD → FRA May 22, 14:45 UTCMay 23, 04:05 UTC13h 19m
2026-05-21 ETH925 NSI → ADD May 21, 22:20 UTCMay 22, 10:25 UTC12h 5m
2026-05-21 ETH604 ADD → PEK May 21, 07:40 UTCMay 21, 08:00 UTC20m
2026-05-18 ETH685 PVG → ADD May 18, 20:35 UTCMay 19, 08:15 UTC11h 40m
2026-05-18 ETH685 PVG → ADD May 18, 02:55 UTCMay 18, 23:55 UTC20h 59m
2026-05-18 ETH684 ADD → PVG May 18, 00:50 UTCMay 18, 23:55 UTC23h 4m
2026-05-16 ETH685 PVG → ADD May 16, 20:25 UTCMay 16, 23:45 UTC3h 20m
2026-05-16 ETH685 PVG → ADD May 16, 02:50 UTCMay 16, 23:45 UTC20h 55m
2026-05-16 ETH685 PVG → ADD May 16, 00:50 UTCMay 16, 23:45 UTC22h 55m
2026-05-14 ETH735 CDG → ADD May 14, 20:00 UTCMay 14, 22:35 UTC2h 35m
2026-05-14 ETH734 ADD → CDG May 14, 02:15 UTCMay 14, 05:35 UTC3h 20m
2026-05-12 ETH713 FCO → ADD May 12, 21:15 UTCMay 12, 23:35 UTC2h 20m
2026-05-12 ETH712 ADD → FCO May 12, 02:45 UTCMay 12, 03:45 UTC1h 0m
2026-05-10 ETH553 YYZ → ADD May 10, 14:54 UTCMay 11, 00:25 UTC9h 30m
2026-05-10 ETH552 ADD → DUB May 10, 03:50 UTCMay 10, 12:10 UTC8h 20m
2026-05-10 ETH552 ADD → DUB May 10, 00:15 UTCMay 10, 02:24 UTC2h 10m
2026-05-08 ETH605 PEK → ADD May 8, 16:35 UTCMay 8, 16:55 UTC20m
2026-05-08 ETH604 ADD → PEK May 8, 07:59 UTCMay 8, 08:19 UTC20m
2026-05-06 ETH735 CDG → ADD May 6, 20:05 UTCMay 6, 23:10 UTC3h 5m
2026-05-06 ETH734 ADD → CDG May 6, 01:05 UTCMay 6, 04:25 UTC3h 20m
2026-05-05 ETH955 ADD → NSI May 5, 11:50 UTCMay 5, 12:15 UTC25m
2026-05-05 ETH955 ADD → NSI May 5, 10:15 UTCMay 5, 10:30 UTC15m
2026-05-04 ETH501 IAD → ADD May 4, 15:15 UTCMay 5, 00:15 UTC9h 1m
2026-05-04 ETH500 DUB → IAD May 4, 04:20 UTCMay 4, 13:15 UTC8h 55m
2026-05-04 ETH500 DUB → IAD May 4, 00:50 UTCMay 4, 02:50 UTC2h 0m
2026-05-02 ETH553 YYZ → ADD May 2, 14:55 UTCMay 3, 01:20 UTC10h 25m
2026-05-02 ETH552 ADD → DUB May 2, 03:50 UTCMay 2, 12:25 UTC8h 35m
2026-05-01 ETH552 ADD → DUB May 1, 23:40 UTCMay 2, 02:15 UTC2h 35m
2026-05-01 ETH552 ADD → DUB May 1, 01:05 UTCMay 2, 00:45 UTC23h 40m
2026-04-30 ETH600 ADD → DXB Apr 30, 22:55 UTCApr 30, 23:25 UTC30m
2026-04-29 ETH751 BRU → ADD Apr 29, 19:55 UTCApr 29, 23:15 UTC3h 19m
2026-04-29 ETH750 ADD → BRU Apr 29, 01:05 UTCApr 29, 05:15 UTC4h 10m
2026-04-28 ETH750 ADD → BRU Apr 28, 07:15 UTCApr 29, 04:44 UTC21h 30m
2026-04-28 ETH507 GRU → ADD Apr 28, 02:00 UTCApr 28, 04:15 UTC2h 15m
2026-04-27 ETH506 ADD → GRU Apr 27, 22:00 UTCApr 28, 00:30 UTC2h 30m
2026-04-27 ETH506 ADD → GRU Apr 27, 12:45 UTCApr 27, 20:15 UTC7h 30m
2026-04-27 ETH506 ADD → GRU Apr 27, 00:25 UTCApr 27, 20:15 UTC19h 50m
2026-04-26 ETH604 ADD → PEK Apr 26, 07:55 UTCApr 26, 08:10 UTC15m
2026-04-25 ETH507 GRU → ADD Apr 25, 06:50 UTCApr 26, 01:50 UTC19h 0m
2026-04-25 ETH507 GRU → ADD Apr 25, 06:15 UTCApr 26, 01:50 UTC19h 35m
2026-04-25 ETH507 GRU → ADD Apr 25, 02:30 UTCApr 25, 04:35 UTC2h 5m
2026-04-24 ETH506 ADD → GRU Apr 24, 22:15 UTCApr 25, 00:50 UTC2h 35m
2026-04-24 ETH506 ADD → GRU Apr 24, 12:25 UTCApr 24, 20:20 UTC7h 55m

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-AYM page for operator, model, and routing details .

Mode-S 040203 frequently asked

What is Mode-S code 040203?
040203 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AYM.
Where is Mode-S 040203 registered?
Mode-S code 040203 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040203 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040203, octal 01001003, decimal 262,659.
What flights does 040203 operate?
Mode-S 040203 has broadcast 20 distinct callsigns, including ETH506, ETH735, ETH734, ETH706, ETH707.