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sensors Mode-S transponder

040204

ICAO 24-bit transponder address · allocated to Ethiopia

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

Hex
040204
Octal
01001004
Decimal
262,660
Country
ET
Tail
ET-AYN
Type
A359
Broadcasting now · callsign ETH706 · 40,000 ft
Flights observed
148
Distinct callsigns
20
Country
ET
Last broadcast
12h ago

Current position

040204 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 040204 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
ETH685 - 17 2026-07-13
ETH506 Ethiopian Airlines 12 2026-06-24
ETH507 - 9 2026-06-25
ETH500 - 8 2026-07-06
ETH735 Ethiopian Airlines 7 2026-06-23
ETH684 - 7 2026-07-13
ETH501 Ethiopian Airlines 7 2026-07-06
ETH727 Ethiopian Airlines 6 2026-05-30
ETH673 - 6 2026-07-11
ETH672 - 6 2026-07-11
ETH808 - 5 2026-07-17
ETH707 Ethiopian Airlines 5 2026-06-28
ETH955 - 4 2026-07-14
ETH734 - 4 2026-06-22
ETH750 - 3 2026-06-19
ETH726 Ethiopian Airlines 3 2026-05-30
ETH710 - 3 2026-07-06
ETH645 - 3 2026-07-15
ETH809 - 2 2026-07-17
ETH751 Ethiopian Airlines 2 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 ETH808 - Jul 17, 14:00 UTCJul 17, 14:30 UTC30m
2026-07-17 ETH809 - Jul 17, 11:50 UTCJul 17, 12:25 UTC35m
2026-07-16 ETH920 - Jul 16, 13:54 UTCJul 17, 12:25 UTC22h 30m
2026-07-15 ETH645 - Jul 15, 19:40 UTCJul 16, 14:29 UTC18h 50m
2026-07-15 ETH645 - Jul 15, 17:45 UTCJul 15, 17:55 UTC10m
2026-07-15 ETH645 - Jul 15, 14:10 UTCJul 15, 15:55 UTC1h 45m
2026-07-15 ETH644 - Jul 15, 10:35 UTCJul 15, 12:15 UTC1h 40m
2026-07-14 ETH644 - Jul 14, 14:45 UTCJul 15, 07:35 UTC16h 49m
2026-07-14 ETH955 - Jul 14, 11:55 UTCJul 14, 12:20 UTC25m
2026-07-14 ETH955 - Jul 14, 10:00 UTCJul 14, 10:25 UTC25m
2026-07-13 ETH685 - Jul 13, 03:05 UTCJul 13, 23:00 UTC19h 55m
2026-07-13 ETH684 - Jul 13, 01:05 UTCJul 13, 23:00 UTC21h 55m
2026-07-13 ETH684 - Jul 13, 00:55 UTCJul 13, 23:00 UTC22h 5m
2026-07-11 ETH673 - Jul 11, 16:15 UTCJul 11, 23:15 UTC7h 0m
2026-07-11 ETH673 - Jul 11, 12:40 UTCJul 11, 14:35 UTC1h 55m
2026-07-11 ETH672 ICN → NRT Jul 11, 09:25 UTCJul 11, 11:15 UTC1h 50m
2026-07-11 ETH672 - Jul 11, 07:15 UTCJul 11, 07:35 UTC20m
2026-07-11 ETH672 - Jul 11, 06:10 UTCJul 11, 06:25 UTC15m
2026-07-09 ETH605 - Jul 9, 17:00 UTCJul 9, 23:10 UTC6h 10m
2026-07-09 ETH604 - Jul 9, 07:50 UTCJul 9, 08:10 UTC20m
2026-07-07 ETH701 LHR → ADD Jul 7, 20:25 UTCJul 7, 23:45 UTC3h 20m
2026-07-06 ETH710 - Jul 6, 21:05 UTCJul 7, 15:25 UTC18h 20m
2026-07-06 ETH710 - Jul 6, 20:50 UTCJul 7, 15:25 UTC18h 35m
2026-07-06 ETH501 IAD → ADD Jul 6, 15:15 UTCJul 7, 15:00 UTC23h 45m
2026-07-06 ETH500 - Jul 6, 03:40 UTCJul 6, 12:45 UTC9h 5m
2026-07-05 ETH500 - Jul 5, 23:30 UTCJul 6, 02:00 UTC2h 30m
2026-07-04 ETH639 KUL → SIN Jul 4, 18:25 UTCJul 4, 22:00 UTC3h 35m
2026-07-04 ETH639 KUL → SIN Jul 4, 15:25 UTCJul 4, 16:00 UTC35m
2026-07-04 ETH638 - Jul 4, 08:15 UTCJul 4, 09:00 UTC45m
2026-07-03 ETH638 - Jul 3, 13:05 UTCJul 4, 06:30 UTC17h 25m
2026-07-02 ETH501 IAD → ADD Jul 2, 20:05 UTCJul 3, 11:15 UTC15h 10m
2026-07-02 ETH501 IAD → ADD Jul 2, 15:05 UTCJul 3, 11:15 UTC20h 10m
2026-07-02 ETH500 - Jul 2, 03:20 UTCJul 2, 12:30 UTC9h 10m
2026-07-01 ETH453 - Jul 1, 00:45 UTCJul 1, 01:00 UTC15m
2026-06-30 ETH452 - Jun 30, 22:40 UTCJun 30, 23:00 UTC20m
2026-06-30 ETH601 - Jun 30, 00:49 UTCJun 30, 01:25 UTC35m
2026-06-29 ETH600 - Jun 29, 22:24 UTCJun 29, 22:59 UTC35m
2026-06-28 ETH707 FRA → ADD Jun 28, 23:04 UTCJun 29, 22:59 UTC23h 55m
2026-06-28 ETH707 FRA → ADD Jun 28, 20:45 UTCJun 29, 00:20 UTC3h 35m
2026-06-25 ETH507 - Jun 25, 04:49 UTCJun 25, 22:59 UTC18h 10m
2026-06-25 ETH507 - Jun 25, 00:44 UTCJun 25, 02:49 UTC2h 5m
2026-06-24 ETH506 ADD → GRU Jun 24, 20:44 UTCJun 24, 23:14 UTC2h 30m
2026-06-23 ETH506 ADD → GRU Jun 23, 23:05 UTCJun 24, 18:50 UTC19h 45m
2026-06-23 ETH735 CDG → ADD Jun 23, 21:05 UTCJun 24, 18:50 UTC21h 45m
2026-06-23 ETH735 CDG → ADD Jun 23, 19:59 UTCJun 24, 18:50 UTC22h 50m
2026-06-22 ETH734 - Jun 22, 09:19 UTCJun 23, 04:19 UTC19h 0m
2026-06-22 ETH601 - Jun 22, 00:55 UTCJun 22, 16:24 UTC15h 30m
2026-06-21 ETH600 - Jun 21, 22:34 UTCJun 21, 23:05 UTC30m
2026-06-20 ETH751 BRU → ADD Jun 20, 19:49 UTCJun 20, 23:25 UTC3h 35m
2026-06-19 ETH750 - Jun 19, 12:04 UTCJun 20, 04:39 UTC16h 35m

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

Mode-S 040204 frequently asked

What is Mode-S code 040204?
040204 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AYN.
Where is Mode-S 040204 registered?
Mode-S code 040204 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040204 broadcasting right now?
Yes. Mode-S 040204 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040204, octal 01001004, decimal 262,660.
What flights does 040204 operate?
Mode-S 040204 has broadcast 20 distinct callsigns, including ETH685, ETH506, ETH507, ETH500, ETH735.