Apparatus

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sensors Mode-S transponder

040049

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-AOS · BOEING 787-8 Dreamliner

Hex
040049
Octal
01000111
Decimal
262,217
Country
ET
Tail
ET-AOS
Type
B788
Transponder active on ground
Flights observed
110
Distinct callsigns
20
Country
ET
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 040049.

Country allocation

The ICAO 24-bit address 040049 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
ETH761 Ethiopian Airlines 21 2026-05-23
ETH760 Ethiopian Airlines 17 2026-05-23
ETH575 Ethiopian Airlines 9 2026-05-19
ETH574 Ethiopian Airlines 7 2026-05-18
ETH645 Ethiopian Airlines 6 2026-05-27
ETH644 Ethiopian Airlines 6 2026-05-27
ETH514 Ethiopian Airlines 5 2026-05-28
ETH724 Ethiopian Airlines 4 2026-04-29
ETH515 Ethiopian Airlines 4 2026-05-29
ETH725 Ethiopian Airlines 3 2026-04-29
ETH519 Ethiopian Airlines 3 2026-05-25
ETH909 Ethiopian Airlines 2 2026-05-19
ETH858 Ethiopian Airlines 2 2026-05-05
ETH849 Ethiopian Airlines 2 2026-05-05
ETH737 Ethiopian Airlines 2 2026-05-21
ETH736 Ethiopian Airlines 2 2026-05-21
ETH518 Ethiopian Airlines 2 2026-05-25
ETH513 Ethiopian Airlines 2 2026-05-10
ETH907 Ethiopian Airlines 1 2026-05-10
ETH906 Ethiopian Airlines 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ETH515 LFW → ADD May 29, 02:25 UTCMay 30, 02:15 UTC23h 50m
2026-05-28 ETH514 LFW → JFK May 28, 15:00 UTCMay 28, 23:40 UTC8h 40m
2026-05-27 ETH514 LFW → JFK May 27, 22:10 UTCMay 28, 16:00 UTC17h 50m
2026-05-27 ETH645 HKG → ADD May 27, 19:15 UTCMay 28, 16:00 UTC20h 45m
2026-05-27 ETH645 HKG → ADD May 27, 17:40 UTCMay 27, 17:55 UTC15m
2026-05-27 ETH645 HKG → ADD May 27, 13:30 UTCMay 27, 15:05 UTC1h 35m
2026-05-27 ETH644 HKG → MNL May 27, 08:55 UTCMay 27, 10:30 UTC1h 35m
2026-05-27 ETH644 HKG → MNL May 27, 01:14 UTCMay 27, 07:10 UTC5h 55m
2026-05-25 ETH519 ATL → ADD May 25, 21:49 UTCMay 26, 01:55 UTC4h 5m
2026-05-25 ETH519 ATL → ADD May 25, 18:00 UTCMay 25, 18:15 UTC15m
2026-05-25 ETH519 ATL → ADD May 25, 15:40 UTCMay 25, 17:55 UTC2h 15m
2026-05-25 ETH518 ADD → DUB May 25, 02:50 UTCMay 25, 12:30 UTC9h 40m
2026-05-24 ETH518 ADD → DUB May 24, 23:15 UTCMay 24, 23:46 UTC31m
2026-05-23 ETH761 DME → ADD May 23, 19:50 UTCMay 23, 23:20 UTC3h 30m
2026-05-23 ETH761 DME → ADD May 23, 02:20 UTCMay 23, 23:20 UTC21h 0m
2026-05-23 ETH761 DME → ADD May 23, 00:20 UTCMay 23, 23:20 UTC23h 0m
2026-05-23 ETH760 ADD → DME May 23, 00:00 UTCMay 23, 22:15 UTC22h 15m
2026-05-21 ETH737 MXP → ADD May 21, 21:40 UTCMay 21, 23:50 UTC2h 10m
2026-05-21 ETH737 MXP → ADD May 21, 19:10 UTCMay 21, 19:50 UTC40m
2026-05-21 ETH736 MXP → ZRH May 21, 05:30 UTCMay 21, 06:05 UTC35m
2026-05-20 ETH736 MXP → ZRH May 20, 14:20 UTCMay 21, 04:20 UTC14h 0m
2026-05-19 ETH909 ADD → BKO May 19, 20:45 UTCMay 20, 11:00 UTC14h 16m
2026-05-19 ETH575 ORD → ADD May 19, 00:20 UTCMay 19, 18:55 UTC18h 35m
2026-05-18 ETH575 ORD → ADD May 18, 22:20 UTCMay 19, 18:55 UTC20h 35m
2026-05-18 ETH575 ORD → ADD May 18, 18:20 UTCMay 19, 18:15 UTC23h 54m
2026-05-18 ETH575 ORD → ADD May 18, 16:05 UTCMay 19, 02:15 UTC10h 9m
2026-05-18 ETH574 DUB → ORD May 18, 03:45 UTCMay 18, 13:10 UTC9h 25m
2026-05-18 ETH574 DUB → ORD May 18, 00:05 UTCMay 18, 02:05 UTC2h 0m
2026-05-17 ETH575 ORD → ADD May 17, 00:20 UTCMay 18, 00:15 UTC23h 55m
2026-05-16 ETH575 ORD → ADD May 16, 15:55 UTCMay 17, 01:15 UTC9h 20m
2026-05-16 ETH574 DUB → ORD May 16, 03:55 UTCMay 16, 13:41 UTC9h 46m
2026-05-15 ETH574 DUB → ORD May 15, 11:15 UTCMay 16, 02:30 UTC15h 14m
2026-05-15 ETH575 ORD → ADD May 15, 00:20 UTCMay 16, 00:15 UTC23h 54m
2026-05-14 ETH575 ORD → ADD May 14, 16:20 UTCMay 15, 11:40 UTC19h 20m
2026-05-14 ETH575 ORD → ADD May 14, 15:50 UTCMay 15, 11:40 UTC19h 50m
2026-05-14 ETH574 DUB → ORD May 14, 04:00 UTCMay 14, 13:20 UTC9h 20m
2026-05-14 ETH574 DUB → ORD May 14, 00:25 UTCMay 14, 02:30 UTC2h 5m
2026-05-13 ETH574 DUB → ORD May 13, 07:10 UTCMay 14, 02:30 UTC19h 20m
2026-05-12 ETH761 DME → ADD May 12, 20:20 UTCMay 13, 07:15 UTC10h 55m
2026-05-12 ETH761 DME → ADD May 12, 04:20 UTCMay 12, 23:20 UTC19h 0m
2026-05-12 ETH761 DME → ADD May 12, 02:45 UTCMay 12, 23:20 UTC20h 35m
2026-05-11 ETH760 ADD → DME May 11, 08:20 UTCMay 12, 04:40 UTC20h 20m
2026-05-11 ETH760 ADD → DME May 11, 08:10 UTCMay 12, 04:40 UTC20h 30m
2026-05-10 ETH907 BKO → DSS May 10, 14:25 UTCMay 11, 05:55 UTC15h 30m
2026-05-10 ETH513 JFK → ABJ May 10, 08:35 UTCMay 11, 05:55 UTC21h 20m
2026-05-10 ETH513 JFK → ABJ May 10, 02:39 UTCMay 10, 14:54 UTC12h 15m
2026-05-09 ETH512 LFW → JFK May 9, 15:45 UTCMay 10, 00:24 UTC8h 40m
2026-05-08 ETH761 DME → ADD May 8, 22:20 UTCMay 9, 16:45 UTC18h 25m
2026-05-08 ETH761 DME → ADD May 8, 21:05 UTCMay 9, 16:45 UTC19h 40m
2026-05-08 ETH761 DME → ADD May 8, 02:19 UTCMay 9, 00:00 UTC21h 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-AOS page for operator, model, and routing details .

Mode-S 040049 frequently asked

What is Mode-S code 040049?
040049 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AOS.
Where is Mode-S 040049 registered?
Mode-S code 040049 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040049 broadcasting right now?
Mode-S 040049 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040049, octal 01000111, decimal 262,217.
What flights does 040049 operate?
Mode-S 040049 has broadcast 20 distinct callsigns, including ETH761, ETH760, ETH575, ETH574, ETH645.