Apparatus

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sensors Mode-S transponder

040199

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-AYC · BOEING 787-9 Dreamliner

Hex
040199
Octal
01000631
Decimal
262,553
Country
ET
Tail
ET-AYC
Type
B789
No current signal · last broadcast 1d ago
Flights observed
112
Distinct callsigns
20
Country
ET
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 040199.

Country allocation

The ICAO 24-bit address 040199 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
ETH730 Ethiopian Airlines 7 2026-05-19
ETH639 Ethiopian Airlines 7 2026-05-02
ETH638 Ethiopian Airlines 7 2026-05-02
ETH629 Ethiopian Airlines 7 2026-05-31
ETH628 Ethiopian Airlines 7 2026-05-31
ETH731 Ethiopian Airlines 6 2026-05-19
ETH955 Ethiopian Airlines 5 2026-04-18
ETH725 Ethiopian Airlines 4 2026-05-13
ETH724 Ethiopian Airlines 4 2026-05-13
ETH553 Ethiopian Airlines 4 2026-05-15
ETH953 Ethiopian Airlines 3 2026-05-31
ETH846 Ethiopian Airlines 3 2026-05-18
ETH718 Ethiopian Airlines 3 2026-05-12
ETH645 Ethiopian Airlines 3 2026-05-06
ETH644 Ethiopian Airlines 3 2026-05-06
ETH574 Ethiopian Airlines 3 2026-05-23
ETH519 Ethiopian Airlines 3 2026-05-27
ETH952 Ethiopian Airlines 2 2026-06-01
ETH844 Ethiopian Airlines 2 2026-05-05
ETH750 Ethiopian Airlines 2 2026-05-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 ETH952 DLA → ADD Jun 1, 12:45 UTCJun 1, 13:10 UTC25m
2026-05-31 ETH953 ADD → DLA May 31, 21:50 UTCJun 1, 10:50 UTC13h 0m
2026-05-31 ETH629 BKK → ADD May 31, 19:15 UTCMay 31, 19:30 UTC15m
2026-05-31 ETH629 BKK → ADD May 31, 13:45 UTCMay 31, 16:45 UTC3h 0m
2026-05-31 ETH628 BKK → CGK May 31, 09:50 UTCMay 31, 10:05 UTC15m
2026-05-31 ETH628 BKK → CGK May 31, 08:30 UTCMay 31, 09:20 UTC50m
2026-05-29 ETH952 DLA → ADD May 29, 12:40 UTCMay 29, 13:10 UTC30m
2026-05-29 ETH953 ADD → DLA May 29, 10:20 UTCMay 29, 10:40 UTC20m
2026-05-28 ETH953 ADD → DLA May 28, 15:40 UTCMay 29, 10:40 UTC19h 0m
2026-05-27 ETH519 ATL → ADD May 27, 21:25 UTCMay 28, 15:45 UTC18h 20m
2026-05-27 ETH519 ATL → ADD May 27, 16:20 UTCMay 28, 15:45 UTC23h 25m
2026-05-27 ETH519 ATL → ADD May 27, 15:05 UTCMay 28, 01:25 UTC10h 20m
2026-05-26 ETH518 ADD → DUB May 26, 23:10 UTCMay 27, 10:25 UTC11h 15m
2026-05-25 ETH611 BOM → ADD May 25, 23:00 UTCMay 25, 23:30 UTC30m
2026-05-25 ETH640 ADD → BOM May 25, 06:25 UTCMay 25, 20:09 UTC13h 45m
2026-05-24 ETH610 ADD → BOM May 24, 08:45 UTCMay 25, 02:40 UTC17h 55m
2026-05-24 ETH610 ADD → BOM May 24, 02:20 UTCMay 25, 02:15 UTC23h 55m
2026-05-23 ETH575 ORD → ADD May 23, 16:00 UTCMay 24, 08:45 UTC16h 45m
2026-05-23 ETH574 DUB → ORD May 23, 03:20 UTCMay 23, 12:50 UTC9h 30m
2026-05-22 ETH574 DUB → ORD May 22, 22:55 UTCMay 23, 01:40 UTC2h 45m
2026-05-22 ETH574 DUB → ORD May 22, 00:20 UTCMay 23, 00:15 UTC23h 55m
2026-05-21 ETH741 MAD → ADD May 21, 22:10 UTCMay 22, 01:05 UTC2h 55m
2026-05-21 ETH741 MAD → ADD May 21, 19:10 UTCMay 21, 20:05 UTC55m
2026-05-21 ETH740 ADD → MAD May 21, 05:15 UTCMay 21, 06:05 UTC50m
2026-05-20 ETH740 ADD → MAD May 20, 12:20 UTCMay 21, 03:55 UTC15h 35m
2026-05-19 ETH731 DUB → ADD May 19, 20:15 UTCMay 20, 10:45 UTC14h 31m
2026-05-19 ETH731 DUB → ADD May 19, 18:00 UTCMay 19, 18:55 UTC55m
2026-05-19 ETH730 VIE → BRU May 19, 05:35 UTCMay 19, 06:25 UTC50m
2026-05-18 ETH730 VIE → BRU May 18, 15:05 UTCMay 19, 04:25 UTC13h 19m
2026-05-18 ETH846 CPT → ADD May 18, 13:45 UTCMay 18, 14:10 UTC25m
2026-05-17 ETH629 BKK → ADD May 17, 19:15 UTCMay 18, 12:25 UTC17h 10m
2026-05-17 ETH629 BKK → ADD May 17, 14:05 UTCMay 17, 17:01 UTC2h 55m
2026-05-17 ETH628 BKK → CGK May 17, 07:00 UTCMay 17, 09:55 UTC2h 55m
2026-05-16 ETH628 BKK → CGK May 16, 13:41 UTCMay 17, 05:45 UTC16h 5m
2026-05-15 ETH553 YYZ → ADD May 15, 22:25 UTCMay 16, 16:45 UTC18h 21m
2026-05-15 ETH553 YYZ → ADD May 15, 20:20 UTCMay 16, 16:45 UTC20h 26m
2026-05-15 ETH553 YYZ → ADD May 15, 16:20 UTCMay 16, 13:46 UTC21h 26m
2026-05-15 ETH553 YYZ → ADD May 15, 14:55 UTCMay 16, 13:46 UTC22h 51m
2026-05-15 ETH552 ADD → DUB May 15, 03:55 UTCMay 15, 12:30 UTC8h 35m
2026-05-15 ETH552 ADD → DUB May 15, 00:20 UTCMay 15, 02:35 UTC2h 15m
2026-05-13 ETH725 VIE → ADD May 13, 20:15 UTCMay 13, 22:45 UTC2h 30m
2026-05-13 ETH725 VIE → ADD May 13, 17:35 UTCMay 13, 18:50 UTC1h 15m
2026-05-13 ETH724 VIE → BRU May 13, 05:55 UTCMay 13, 07:10 UTC1h 15m
2026-05-12 ETH724 VIE → BRU May 12, 10:20 UTCMay 13, 04:25 UTC18h 5m
2026-05-12 ETH719 LGW → ADD May 12, 09:40 UTCMay 13, 04:25 UTC18h 45m
2026-05-12 ETH718 ADD → LGW May 12, 02:45 UTCMay 12, 05:20 UTC2h 35m
2026-05-10 ETH751 BRU → ADD May 10, 20:09 UTCMay 10, 23:35 UTC3h 25m
2026-05-10 ETH750 ADD → BRU May 10, 02:24 UTCMay 10, 05:00 UTC2h 35m
2026-05-10 ETH750 ADD → BRU May 10, 01:14 UTCMay 10, 02:20 UTC1h 5m
2026-05-08 ETH609 HKG → BKK May 8, 19:25 UTCMay 8, 22:35 UTC3h 10m

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

Mode-S 040199 frequently asked

What is Mode-S code 040199?
040199 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AYC.
Where is Mode-S 040199 registered?
Mode-S code 040199 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040199 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040199, octal 01000631, decimal 262,553.
What flights does 040199 operate?
Mode-S 040199 has broadcast 20 distinct callsigns, including ETH730, ETH639, ETH638, ETH629, ETH628.