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sensors Mode-S transponder

040101

ICAO 24-bit transponder address · allocated to Ethiopia

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

Hex
040101
Octal
01000401
Decimal
262,401
Country
ET
Tail
ET-ASG
Type
B788
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
205
Distinct callsigns
20
Country
ET
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 040101.

Country allocation

The ICAO 24-bit address 040101 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
ETH645 Ethiopian Airlines 24 2026-05-03
ETH644 Ethiopian Airlines 20 2026-05-03
ETH553 Ethiopian Airlines 20 2026-07-26
ETH552 Ethiopian Airlines 18 2026-07-26
ETH737 Ethiopian Airlines 14 2026-07-22
ETH715 - 12 2026-07-07
ETH736 Ethiopian Airlines 11 2026-07-21
ETH714 - 11 2026-07-07
ETH909 Ethiopian Airlines 4 2026-05-21
ETH8413 - 4 2026-04-19
ETH741 Ethiopian Airlines 4 2026-05-18
ETH740 Ethiopian Airlines 4 2026-05-18
ETH718 - 3 2026-07-11
ETH672 - 3 2026-06-27
ETH628 - 3 2026-07-02
ETH8632 - 2 2026-05-23
ETH8628 - 2 2026-05-22
ETH859 Ethiopian Airlines 2 2026-04-28
ETH731 - 2 2026-07-09
ETH730 - 2 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ETH553 YYZ → ADD Jul 26, 15:10 UTCJul 26, 22:15 UTC7h 5m
2026-07-26 ETH552 ADD → DUB Jul 26, 04:40 UTCJul 26, 13:00 UTC8h 21m
2026-07-25 ETH552 ADD → DUB Jul 25, 23:55 UTCJul 26, 02:50 UTC2h 55m
2026-07-24 ETH906 DSS → BKO Jul 24, 19:00 UTCJul 24, 19:30 UTC30m
2026-07-23 ETH553 YYZ → ADD Jul 23, 22:20 UTCJul 24, 16:50 UTC18h 30m
2026-07-23 ETH553 YYZ → ADD Jul 23, 20:30 UTCJul 24, 16:50 UTC20h 20m
2026-07-23 ETH553 YYZ → ADD Jul 23, 16:55 UTCJul 24, 16:15 UTC23h 20m
2026-07-23 ETH553 YYZ → ADD Jul 23, 15:30 UTCJul 23, 16:50 UTC1h 20m
2026-07-23 ETH552 ADD → DUB Jul 23, 04:30 UTCJul 23, 13:20 UTC8h 50m
2026-07-22 ETH552 ADD → DUB Jul 22, 13:45 UTCJul 23, 02:50 UTC13h 5m
2026-07-22 ETH737 MXP → ADD Jul 22, 00:40 UTCJul 23, 00:00 UTC23h 20m
2026-07-21 ETH737 - Jul 21, 21:45 UTCJul 22, 13:55 UTC16h 10m
2026-07-21 ETH737 ZRH → MXP Jul 21, 19:10 UTCJul 21, 19:45 UTC35m
2026-07-21 ETH736 MXP → ZRH Jul 21, 05:20 UTCJul 21, 05:55 UTC35m
2026-07-21 ETH736 MXP → ZRH Jul 21, 01:25 UTCJul 21, 04:00 UTC2h 35m
2026-07-19 ETH513 - Jul 19, 07:45 UTCJul 19, 20:50 UTC13h 5m
2026-07-19 ET512 LFW → JFK Jul 19, 02:40 UTCJul 19, 03:25 UTC45m
2026-07-18 ETH512 - Jul 18, 15:35 UTCJul 18, 23:30 UTC7h 55m
2026-07-18 ETH512 - Jul 18, 00:35 UTCJul 18, 23:30 UTC22h 56m
2026-07-17 ETH737 - Jul 17, 22:20 UTCJul 18, 16:30 UTC18h 11m
2026-07-17 ETH737 - Jul 17, 22:00 UTCJul 18, 16:30 UTC18h 31m
2026-07-17 ETH737 ZRH → MXP Jul 17, 19:15 UTCJul 17, 19:55 UTC40m
2026-07-17 ETH736 MXP → ZRH Jul 17, 06:05 UTCJul 17, 06:35 UTC30m
2026-07-16 ETH736 MXP → ZRH Jul 16, 13:49 UTCJul 17, 03:50 UTC14h 0m
2026-07-16 ETH553 - Jul 16, 00:25 UTCJul 17, 00:14 UTC23h 50m
2026-07-15 ETH553 - Jul 15, 20:30 UTCJul 16, 14:00 UTC17h 30m
2026-07-15 ETH553 - Jul 15, 16:20 UTCJul 16, 14:00 UTC21h 40m
2026-07-15 ETH553 - Jul 15, 15:00 UTCJul 16, 14:00 UTC23h 0m
2026-07-15 ETH552 - Jul 15, 04:00 UTCJul 15, 12:40 UTC8h 40m
2026-07-14 ETH552 - Jul 14, 23:10 UTCJul 15, 02:05 UTC2h 55m
2026-07-14 ETH552 - Jul 14, 00:35 UTCJul 15, 00:15 UTC23h 39m
2026-07-13 ETH553 - Jul 13, 14:50 UTCJul 14, 01:05 UTC10h 15m
2026-07-13 ETH552 FCO → YYZ Jul 13, 03:30 UTCJul 13, 11:55 UTC8h 25m
2026-07-12 ETH719 LGW → FCO Jul 12, 09:50 UTCJul 13, 02:01 UTC16h 10m
2026-07-11 ETH718 - Jul 11, 14:55 UTCJul 12, 05:05 UTC14h 10m
2026-07-11 ETH718 - Jul 11, 09:15 UTCJul 12, 05:05 UTC19h 50m
2026-07-11 ETH515 - Jul 11, 02:50 UTCJul 12, 02:15 UTC23h 25m
2026-07-10 ETH514 - Jul 10, 16:20 UTCJul 11, 00:25 UTC8h 5m
2026-07-09 ETH514 - Jul 9, 22:20 UTCJul 10, 17:15 UTC18h 55m
2026-07-09 ETH731 - Jul 9, 20:20 UTCJul 10, 17:15 UTC20h 55m
2026-07-09 ETH731 - Jul 9, 18:00 UTCJul 9, 18:50 UTC50m
2026-07-09 ETH730 VIE → WAW Jul 9, 05:25 UTCJul 9, 06:25 UTC1h 0m
2026-07-08 ETH730 CPT → VIE Jul 8, 12:10 UTCJul 9, 04:10 UTC16h 0m
2026-07-07 ETH715 ARN → CPT Jul 7, 20:10 UTCJul 8, 11:00 UTC14h 50m
2026-07-07 ETH715 OSL → ARN Jul 7, 18:15 UTCJul 7, 19:00 UTC45m
2026-07-07 ETH714 ARN → OSL Jul 7, 05:50 UTCJul 7, 06:35 UTC45m
2026-07-07 ETH714 - Jul 7, 00:40 UTCJul 7, 04:15 UTC3h 35m
2026-07-05 ETH737 MXP → ADD Jul 5, 22:05 UTCJul 6, 00:15 UTC2h 10m
2026-07-05 ETH737 MXP → ADD Jul 5, 19:50 UTCJul 5, 20:20 UTC30m
2026-07-05 ETH736 MXP → ZRH Jul 5, 05:25 UTCJul 5, 06:05 UTC40m

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

Mode-S 040101 frequently asked

What is Mode-S code 040101?
040101 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-ASG.
Where is Mode-S 040101 registered?
Mode-S code 040101 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040101 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040101, octal 01000401, decimal 262,401.
What flights does 040101 operate?
Mode-S 040101 has broadcast 20 distinct callsigns, including ETH645, ETH644, ETH553, ETH552, ETH737.