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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 7h ago
Flights observed
160
Distinct callsigns
20
Country
ET
Last broadcast
7h 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 - 15 2026-07-09
ETH707 Ethiopian Airlines 11 2026-07-05
ETH735 Ethiopian Airlines 10 2026-06-27
ETH706 - 10 2026-07-04
ETH685 Ethiopian Airlines 10 2026-07-07
ETH734 - 9 2026-06-27
ETH507 - 9 2026-07-10
ETH645 Ethiopian Airlines 8 2026-07-01
ETH500 - 6 2026-07-12
ETH751 Ethiopian Airlines 5 2026-06-21
ETH750 - 5 2026-06-21
ETH644 - 5 2026-07-01
ETH552 Ethiopian Airlines 5 2026-05-10
ETH955 - 4 2026-07-04
ETH726 Ethiopian Airlines 4 2026-04-18
ETH684 - 4 2026-07-07
ETH501 - 4 2026-07-12
ETH925 - 3 2026-06-22
ETH604 Ethiopian Airlines 3 2026-05-21
ETH600 - 3 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ETH601 - Jul 14, 01:15 UTCJul 14, 01:45 UTC30m
2026-07-13 ETH600 - Jul 13, 22:35 UTCJul 13, 23:05 UTC30m
2026-07-13 ETH600 - Jul 13, 00:55 UTCJul 13, 23:05 UTC22h 10m
2026-07-12 ETH501 - Jul 12, 22:50 UTCJul 13, 22:45 UTC23h 55m
2026-07-12 ETH501 - Jul 12, 15:15 UTCJul 13, 01:05 UTC9h 50m
2026-07-12 ETH500 - Jul 12, 03:35 UTCJul 12, 12:15 UTC8h 40m
2026-07-12 ETH500 - Jul 12, 00:35 UTCJul 12, 02:01 UTC1h 25m
2026-07-11 ETH453 - Jul 11, 02:10 UTCJul 11, 02:20 UTC10m
2026-07-10 ETH507 - Jul 10, 06:05 UTCJul 10, 13:10 UTC7h 5m
2026-07-10 ETH507 - Jul 10, 02:30 UTCJul 10, 04:35 UTC2h 5m
2026-07-09 ETH506 - Jul 9, 22:20 UTCJul 10, 01:05 UTC2h 45m
2026-07-09 ETH506 - Jul 9, 11:50 UTCJul 9, 20:30 UTC8h 40m
2026-07-09 ETH506 - Jul 9, 10:10 UTCJul 9, 10:25 UTC15m
2026-07-08 ETH808 - Jul 8, 13:15 UTCJul 8, 13:40 UTC25m
2026-07-07 ETH685 PVG → ADD Jul 7, 19:40 UTCJul 8, 11:20 UTC15h 40m
2026-07-07 ETH685 PVG → ADD Jul 7, 04:50 UTCJul 7, 23:05 UTC18h 15m
2026-07-07 ETH685 PVG → ADD Jul 7, 03:10 UTCJul 7, 23:05 UTC19h 55m
2026-07-07 ETH684 - Jul 7, 01:15 UTCJul 7, 23:05 UTC21h 50m
2026-07-05 ETH707 FRA → ADD Jul 5, 20:25 UTCJul 5, 23:45 UTC3h 20m
2026-07-04 ETH706 - Jul 4, 14:45 UTCJul 5, 04:05 UTC13h 20m
2026-07-04 ETH955 - Jul 4, 12:25 UTCJul 4, 12:50 UTC25m
2026-07-04 ETH955 - Jul 4, 10:35 UTCJul 4, 10:50 UTC15m
2026-07-03 ETH501 IAD → ADD Jul 3, 15:10 UTCJul 4, 00:45 UTC9h 35m
2026-07-03 ETH500 - Jul 3, 03:45 UTCJul 3, 12:40 UTC8h 55m
2026-07-02 ETH500 - Jul 2, 23:55 UTCJul 3, 01:50 UTC1h 55m
2026-07-01 ETH645 HKG → ADD Jul 1, 18:50 UTCJul 1, 21:40 UTC2h 50m
2026-07-01 ETH645 HKG → ADD Jul 1, 16:50 UTCJul 1, 17:05 UTC15m
2026-07-01 ETH645 HKG → ADD Jul 1, 15:00 UTCJul 1, 15:20 UTC20m
2026-07-01 ETH645 HKG → ADD Jul 1, 13:40 UTCJul 1, 14:20 UTC40m
2026-07-01 ETH644 - Jul 1, 08:50 UTCJul 1, 10:25 UTC1h 35m
2026-07-01 ETH644 - Jul 1, 01:25 UTCJul 1, 07:20 UTC5h 55m
2026-06-29 ETH645 HKG → ADD Jun 29, 19:00 UTCJun 29, 22:05 UTC3h 5m
2026-06-29 ETH645 HKG → ADD Jun 29, 17:19 UTCJun 29, 17:34 UTC15m
2026-06-29 ETH645 HKG → ADD Jun 29, 15:14 UTCJun 29, 15:34 UTC20m
2026-06-29 ETH645 HKG → ADD Jun 29, 13:49 UTCJun 29, 14:34 UTC45m
2026-06-29 ETH644 HKG → MNL Jun 29, 08:54 UTCJun 29, 10:40 UTC1h 45m
2026-06-29 ETH644 - Jun 29, 06:50 UTCJun 29, 07:34 UTC45m
2026-06-29 ETH644 - Jun 29, 01:20 UTCJun 29, 06:05 UTC4h 45m
2026-06-27 ETH735 CDG → ADD Jun 27, 21:15 UTCJun 28, 01:10 UTC3h 55m
2026-06-27 ETH734 - Jun 27, 00:39 UTCJun 27, 04:19 UTC3h 40m
2026-06-26 ETH734 - Jun 26, 06:50 UTCJun 27, 04:19 UTC21h 30m
2026-06-26 ETH734 - Jun 26, 05:19 UTCJun 27, 04:19 UTC23h 0m
2026-06-26 ETH712 - Jun 26, 01:20 UTCJun 26, 03:05 UTC1h 45m
2026-06-24 ETH433 DOH → ADD Jun 24, 00:34 UTCJun 24, 00:59 UTC25m
2026-06-23 ETH432 ADD → DOH Jun 23, 22:25 UTCJun 23, 23:05 UTC40m
2026-06-22 ETH925 - Jun 22, 14:19 UTCJun 22, 14:34 UTC15m
2026-06-22 ETH925 - Jun 22, 12:05 UTCJun 22, 12:44 UTC40m
2026-06-21 ETH751 BRU → ADD Jun 21, 19:55 UTCJun 22, 10:05 UTC14h 10m
2026-06-21 ETH750 - Jun 21, 01:35 UTCJun 21, 05:00 UTC3h 25m
2026-06-19 ETH639 KUL → SIN Jun 19, 18:25 UTCJun 19, 22:04 UTC3h 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 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 7h 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, ETH707, ETH735, ETH706, ETH685.