Apparatus

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sensors Mode-S transponder

040123

ICAO 24-bit transponder address · allocated to Ethiopia

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

Hex
040123
Octal
01000443
Decimal
262,435
Country
ET
Tail
ET-ATG
Type
B788
No current signal · last broadcast Jul 26, 14:40 UTC
Flights observed
205
Distinct callsigns
20
Country
ET
Last broadcast
Jul 26, 14:40 UTC

Last known position

Most recent position reported by Mode-S 040123.

Country allocation

The ICAO 24-bit address 040123 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
ETH715 - 29 2026-07-11
ETH714 - 24 2026-07-11
ETH718 Ethiopian Airlines 12 2026-07-22
ETH514 Ethiopian Airlines 12 2026-07-21
ETH737 Ethiopian Airlines 10 2026-07-24
ETH515 Ethiopian Airlines 10 2026-07-22
ETH725 - 9 2026-06-15
ETH516 Ethiopian Airlines 9 2026-07-25
ETH741 Ethiopian Airlines 8 2026-06-25
ETH736 Ethiopian Airlines 8 2026-07-24
ETH724 - 8 2026-06-15
ETH719 Ethiopian Airlines 7 2026-07-23
ETH740 - 6 2026-06-25
ETH731 Ethiopian Airlines 5 2026-06-28
ETH730 - 5 2026-06-28
ETH712 Ethiopian Airlines 5 2026-07-20
ETH628 - 4 2026-07-04
ETH517 Ethiopian Airlines 4 2026-07-26
ETH909 Ethiopian Airlines 3 2026-05-07
ETH713 Ethiopian Airlines 3 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ETH517 LFW → ADD Jul 26, 01:50 UTCJul 26, 14:40 UTC12h 51m
2026-07-25 ETH516 LFW → IAD Jul 25, 15:10 UTCJul 25, 23:30 UTC8h 20m
2026-07-24 ETH516 LFW → IAD Jul 24, 22:50 UTCJul 25, 22:45 UTC23h 55m
2026-07-24 ETH737 MXP → ADD Jul 24, 21:55 UTCJul 25, 16:00 UTC18h 5m
2026-07-24 ETH737 MXP → ADD Jul 24, 19:10 UTCJul 24, 19:50 UTC40m
2026-07-24 ETH736 MXP → ZRH Jul 24, 05:45 UTCJul 24, 06:20 UTC35m
2026-07-23 ETH719 LGW → ADD Jul 23, 09:50 UTCJul 24, 04:35 UTC18h 45m
2026-07-22 ETH718 ADD → LGW Jul 22, 15:00 UTCJul 23, 05:20 UTC14h 20m
2026-07-22 ETH718 ADD → LGW Jul 22, 02:50 UTCJul 23, 02:45 UTC23h 55m
2026-07-22 ETH515 LFW → ADD Jul 22, 02:40 UTCJul 22, 15:05 UTC12h 25m
2026-07-21 ETH514 LFW → JFK Jul 21, 14:50 UTCJul 21, 22:55 UTC8h 5m
2026-07-21 ETH514 LFW → JFK Jul 21, 00:00 UTCJul 21, 22:45 UTC22h 45m
2026-07-20 ETH687 - Jul 20, 21:40 UTCJul 21, 15:45 UTC18h 4m
2026-07-20 ETH717 FCO → ADD Jul 20, 05:20 UTCJul 20, 20:10 UTC14h 50m
2026-07-20 ETH712 ADD → FCO Jul 20, 01:15 UTCJul 20, 03:15 UTC2h 0m
2026-07-18 ETH308 ADD → NBO Jul 18, 22:40 UTCJul 18, 22:50 UTC10m
2026-07-17 ETH609 - Jul 17, 22:00 UTCJul 18, 14:05 UTC16h 6m
2026-07-17 ETH609 - Jul 17, 19:25 UTCJul 17, 19:40 UTC15m
2026-07-17 ETH609 - Jul 17, 17:30 UTCJul 17, 17:50 UTC20m
2026-07-16 ETH608 - Jul 16, 14:20 UTCJul 17, 05:25 UTC15h 5m
2026-07-14 ETH737 - Jul 14, 21:45 UTCJul 15, 00:45 UTC2h 59m
2026-07-14 ETH737 ZRH → MXP Jul 14, 19:10 UTCJul 14, 19:45 UTC35m
2026-07-14 ETH736 MXP → ZRH Jul 14, 05:30 UTCJul 14, 06:00 UTC30m
2026-07-13 ETH719 LGW → MXP Jul 13, 10:40 UTCJul 14, 04:05 UTC17h 25m
2026-07-13 ETH718 - Jul 13, 00:45 UTCJul 13, 05:10 UTC4h 25m
2026-07-11 ETH715 - Jul 11, 20:35 UTCJul 12, 00:40 UTC4h 5m
2026-07-11 ETH715 OSL → ARN Jul 11, 18:15 UTCJul 11, 19:00 UTC45m
2026-07-11 ETH714 ARN → OSL Jul 11, 06:05 UTCJul 11, 06:45 UTC40m
2026-07-11 ETH714 - Jul 11, 04:20 UTCJul 11, 04:45 UTC25m
2026-07-11 ETH714 - Jul 11, 01:00 UTCJul 11, 03:20 UTC2h 20m
2026-07-10 ETH515 - Jul 10, 08:40 UTCJul 11, 00:55 UTC16h 15m
2026-07-10 ETH515 - Jul 10, 02:50 UTCJul 11, 00:55 UTC22h 5m
2026-07-10 ETH515 - Jul 10, 02:10 UTCJul 10, 14:55 UTC12h 45m
2026-07-09 ETH514 - Jul 9, 15:05 UTCJul 9, 23:20 UTC8h 15m
2026-07-09 ETH514 - Jul 9, 00:10 UTCJul 9, 22:45 UTC22h 35m
2026-07-08 ETH715 - Jul 8, 20:15 UTCJul 8, 23:30 UTC3h 15m
2026-07-08 ETH715 OSL → ARN Jul 8, 18:00 UTCJul 8, 18:40 UTC40m
2026-07-08 ETH714 ARN → OSL Jul 8, 05:55 UTCJul 8, 06:40 UTC45m
2026-07-07 ETH719 LGW → ARN Jul 7, 09:40 UTCJul 8, 04:30 UTC18h 50m
2026-07-06 ETH718 - Jul 6, 11:05 UTCJul 7, 05:50 UTC18h 45m
2026-07-06 ETH718 - Jul 6, 04:50 UTCJul 7, 04:45 UTC23h 55m
2026-07-06 ETH515 - Jul 6, 04:40 UTCJul 7, 02:45 UTC22h 5m
2026-07-05 ETH514 LFW → JFK Jul 5, 14:45 UTCJul 5, 23:20 UTC8h 35m
2026-07-04 ETH514 LFW → JFK Jul 4, 21:30 UTCJul 5, 15:50 UTC18h 20m
2026-07-04 ETH629 BKK → ADD Jul 4, 18:55 UTCJul 4, 19:10 UTC15m
2026-07-04 ETH629 BKK → ADD Jul 4, 13:50 UTCJul 4, 16:40 UTC2h 50m
2026-07-04 ETH628 - Jul 4, 10:00 UTCJul 4, 10:20 UTC20m
2026-07-04 ETH628 - Jul 4, 07:20 UTCJul 4, 09:25 UTC2h 5m
2026-07-03 ETH628 - Jul 3, 15:40 UTCJul 4, 05:50 UTC14h 10m
2026-07-03 ETH628 - Jul 3, 09:40 UTCJul 4, 05:50 UTC20h 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-ATG page for operator, model, and routing details .

Mode-S 040123 frequently asked

What is Mode-S code 040123?
040123 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-ATG.
Where is Mode-S 040123 registered?
Mode-S code 040123 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040123 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 14:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040123, octal 01000443, decimal 262,435.
What flights does 040123 operate?
Mode-S 040123 has broadcast 20 distinct callsigns, including ETH715, ETH714, ETH718, ETH514, ETH737.