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sensors Mode-S transponder

040198

ICAO 24-bit transponder address · allocated to Ethiopia

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

Hex
040198
Octal
01000630
Decimal
262,552
Country
ET
Tail
ET-AYA
Type
A359
No current signal · last broadcast Jul 26, 15:40 UTC
Flights observed
150
Distinct callsigns
20
Country
ET
Last broadcast
Jul 26, 15:40 UTC

Last known position

Most recent position reported by Mode-S 040198.

Country allocation

The ICAO 24-bit address 040198 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
ETH500 - 13 2026-07-13
ETH685 - 12 2026-07-11
ETH501 - 12 2026-07-13
ETH506 Ethiopian Airlines 11 2026-06-09
ETH734 - 10 2026-07-05
ETH735 Ethiopian Airlines 7 2026-07-05
ETH684 - 7 2026-07-11
ETH713 Ethiopian Airlines 6 2026-05-18
ETH712 Ethiopian Airlines 6 2026-05-18
ETH604 - 5 2026-07-16
ETH808 - 4 2026-07-19
ETH727 Ethiopian Airlines 4 2026-04-14
ETH706 Ethiopian Airlines 4 2026-06-11
ETH605 - 4 2026-07-16
ETH507 Ethiopian Airlines 4 2026-06-10
ETH707 Ethiopian Airlines 3 2026-06-11
ETH645 Ethiopian Airlines 3 2026-06-17
ETH644 - 3 2026-06-17
ETH934 - 2 2026-07-15
ETH845 Ethiopian Airlines 2 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ETH673 ICN → ADD Jul 26, 14:50 UTCJul 26, 15:40 UTC50m
2026-07-26 ETH673 ICN → ADD Jul 26, 07:50 UTCJul 26, 13:45 UTC5h 55m
2026-07-26 ETH2673 - Jul 26, 03:25 UTCJul 26, 05:20 UTC1h 55m
2026-07-25 ETH2672 ICN → NRT Jul 25, 23:55 UTCJul 26, 01:45 UTC1h 50m
2026-07-25 ETH672 ICN → NRT Jul 25, 01:30 UTCJul 25, 07:35 UTC6h 5m
2026-07-24 ETH601 DXB → ADD Jul 24, 01:20 UTCJul 24, 01:50 UTC30m
2026-07-23 ETH600 ADD → DXB Jul 23, 22:40 UTCJul 23, 23:20 UTC40m
2026-07-22 ETH603 DXB → ADD Jul 22, 14:25 UTCJul 22, 15:00 UTC35m
2026-07-21 ETH701 - Jul 21, 20:25 UTCJul 22, 12:40 UTC16h 15m
2026-07-21 ETH710 ADD → LHR Jul 21, 01:00 UTCJul 21, 15:10 UTC14h 10m
2026-07-20 ETH600 - Jul 20, 22:35 UTCJul 20, 23:10 UTC35m
2026-07-19 ETH808 - Jul 19, 13:25 UTCJul 19, 13:50 UTC25m
2026-07-19 ETH809 ADD → JNB Jul 19, 11:00 UTCJul 19, 11:35 UTC35m
2026-07-16 ETH605 - Jul 16, 16:30 UTCJul 17, 11:04 UTC18h 35m
2026-07-16 ETH604 - Jul 16, 08:05 UTCJul 16, 08:25 UTC20m
2026-07-15 ETH934 - Jul 15, 14:25 UTCJul 16, 01:55 UTC11h 30m
2026-07-13 ETH501 - Jul 13, 15:10 UTCJul 14, 01:20 UTC10h 10m
2026-07-13 ETH500 - Jul 13, 03:45 UTCJul 13, 12:25 UTC8h 40m
2026-07-12 ETH500 - Jul 12, 23:15 UTCJul 13, 01:45 UTC2h 30m
2026-07-11 ETH685 - Jul 11, 04:05 UTCJul 11, 23:15 UTC19h 10m
2026-07-11 ETH684 - Jul 11, 02:05 UTCJul 11, 23:15 UTC21h 10m
2026-07-11 ETH684 - Jul 11, 01:35 UTCJul 11, 23:15 UTC21h 40m
2026-07-10 ETH684 - Jul 10, 14:05 UTCJul 11, 05:25 UTC15h 21m
2026-07-09 ETH685 - Jul 9, 19:50 UTCJul 10, 12:25 UTC16h 35m
2026-07-09 ETH685 - Jul 9, 04:05 UTCJul 9, 23:10 UTC19h 5m
2026-07-09 ETH685 - Jul 9, 03:05 UTCJul 9, 23:10 UTC20h 5m
2026-07-09 ETH685 - Jul 9, 01:15 UTCJul 9, 23:10 UTC21h 55m
2026-07-07 ETH501 IAD → ADD Jul 7, 15:35 UTCJul 8, 00:50 UTC9h 15m
2026-07-07 ETH500 - Jul 7, 04:00 UTCJul 7, 12:55 UTC8h 55m
2026-07-05 ETH735 CDG → ADD Jul 5, 20:00 UTCJul 5, 23:35 UTC3h 35m
2026-07-05 ETH734 - Jul 5, 01:35 UTCJul 5, 04:50 UTC3h 15m
2026-07-03 ETH685 PVG → ADD Jul 3, 23:45 UTCJul 4, 00:25 UTC40m
2026-07-03 ETH685 PVG → ADD Jul 3, 04:05 UTCJul 3, 22:40 UTC18h 35m
2026-07-03 ETH684 - Jul 3, 02:55 UTCJul 3, 22:40 UTC19h 45m
2026-07-03 ETH684 - Jul 3, 01:10 UTCJul 3, 22:40 UTC21h 30m
2026-07-02 ETH684 - Jul 2, 13:15 UTCJul 3, 04:40 UTC15h 25m
2026-07-01 ETH605 - Jul 1, 16:45 UTCJul 2, 11:40 UTC18h 55m
2026-07-01 ETH604 - Jul 1, 08:05 UTCJul 1, 08:35 UTC30m
2026-06-29 ETH605 - Jun 29, 22:05 UTCJun 30, 00:00 UTC1h 55m
2026-06-29 ETH605 - Jun 29, 16:39 UTCJun 29, 16:50 UTC10m
2026-06-29 ETH604 - Jun 29, 08:14 UTCJun 29, 08:39 UTC25m
2026-06-28 ETH808 - Jun 28, 13:29 UTCJun 29, 02:05 UTC12h 35m
2026-06-27 ETH809 - Jun 27, 16:39 UTCJun 28, 11:35 UTC18h 55m
2026-06-27 ETH604 - Jun 27, 07:59 UTCJun 27, 08:14 UTC15m
2026-06-25 ETH501 IAD → ADD Jun 25, 15:24 UTCJun 26, 00:24 UTC9h 0m
2026-06-25 ETH500 - Jun 25, 03:24 UTCJun 25, 12:30 UTC9h 5m
2026-06-24 ETH500 - Jun 24, 23:00 UTCJun 25, 01:44 UTC2h 45m
2026-06-24 ETH501 IAD → ADD Jun 24, 00:05 UTCJun 24, 23:59 UTC23h 55m
2026-06-23 ETH501 IAD → ADD Jun 23, 20:34 UTCJun 24, 00:34 UTC4h 0m
2026-06-23 ETH501 IAD → ADD Jun 23, 15:19 UTCJun 23, 17:04 UTC1h 45m

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

Mode-S 040198 frequently asked

What is Mode-S code 040198?
040198 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AYA.
Where is Mode-S 040198 registered?
Mode-S code 040198 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040198 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040198, octal 01000630, decimal 262,552.
What flights does 040198 operate?
Mode-S 040198 has broadcast 20 distinct callsigns, including ETH500, ETH685, ETH501, ETH506, ETH734.