Apparatus

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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 1h ago
Flights observed
174
Distinct callsigns
20
Country
ET
Last broadcast
1h ago

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
ETH715 - 12 2026-07-07
ETH714 - 11 2026-07-07
ETH553 - 11 2026-07-13
ETH552 - 11 2026-07-13
ETH737 Ethiopian Airlines 8 2026-07-05
ETH736 - 7 2026-07-05
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
2026-07-13 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
2026-07-05 ETH736 - Jul 5, 01:00 UTCJul 5, 03:40 UTC2h 40m
2026-07-02 ETH629 BKK → ADD Jul 2, 19:15 UTCJul 2, 22:10 UTC2h 55m
2026-07-02 ETH629 BKK → ADD Jul 2, 14:00 UTCJul 2, 17:05 UTC3h 5m
2026-07-02 ETH628 - Jul 2, 10:40 UTCJul 2, 10:55 UTC15m
2026-07-02 ETH628 - Jul 2, 08:05 UTCJul 2, 10:05 UTC2h 0m
2026-07-02 ETH628 - Jul 2, 01:40 UTCJul 2, 06:15 UTC4h 35m
2026-06-30 ETH737 MXP → ADD Jun 30, 23:20 UTCJul 1, 02:10 UTC2h 50m
2026-06-30 ETH737 MXP → ADD Jun 30, 21:05 UTCJun 30, 21:45 UTC40m
2026-06-30 ETH736 MXP → ZRH Jun 30, 05:10 UTCJun 30, 05:45 UTC35m
2026-06-30 ETH736 - Jun 30, 00:45 UTCJun 30, 03:35 UTC2h 51m
2026-06-27 ETH673 - Jun 27, 15:34 UTCJun 28, 00:15 UTC8h 40m
2026-06-27 ETH673 - Jun 27, 12:19 UTCJun 27, 14:09 UTC1h 50m
2026-06-27 ETH672 ICN → NRT Jun 27, 08:49 UTCJun 27, 10:45 UTC1h 55m
2026-06-27 ETH672 - Jun 27, 06:35 UTCJun 27, 07:04 UTC30m
2026-06-26 ETH672 - Jun 26, 11:05 UTCJun 27, 05:39 UTC18h 35m
2026-06-26 ETH681 - Jun 26, 08:54 UTCJun 27, 05:39 UTC20h 45m
2026-06-25 ETH680 - Jun 25, 13:45 UTCJun 26, 03:54 UTC14h 10m
2026-06-24 ETH553 YYZ → ADD Jun 24, 20:20 UTCJun 25, 13:55 UTC17h 35m
2026-06-24 ETH553 YYZ → ADD Jun 24, 16:19 UTCJun 25, 13:55 UTC21h 35m
2026-06-24 ETH553 YYZ → ADD Jun 24, 15:24 UTCJun 25, 13:55 UTC22h 30m
2026-06-24 ETH552 - Jun 24, 03:40 UTCJun 24, 12:14 UTC8h 35m
2026-06-23 ETH552 CPT → FCO Jun 23, 12:15 UTCJun 24, 02:05 UTC13h 50m
2026-06-22 ETH715 ARN → CPT Jun 22, 20:19 UTCJun 23, 10:59 UTC14h 40m
2026-06-22 ETH715 OSL → ARN Jun 22, 18:15 UTCJun 22, 18:54 UTC40m
2026-06-22 ETH714 ARN → OSL Jun 22, 05:49 UTCJun 22, 06:35 UTC45m
2026-06-21 ETH714 LGW → ARN Jun 21, 09:35 UTCJun 22, 04:04 UTC18h 30m
2026-06-21 ETH718 - Jun 21, 01:19 UTCJun 21, 05:04 UTC3h 45m
2026-06-19 ETH553 YYZ → ADD Jun 19, 15:04 UTCJun 19, 23:59 UTC8h 55m
2026-06-19 ETH552 FCO → YYZ Jun 19, 03:49 UTCJun 19, 12:19 UTC8h 30m
2026-06-18 ETH552 - Jun 18, 14:01 UTCJun 19, 02:04 UTC12h 4m
2026-06-18 ETH823 - Jun 18, 00:20 UTCJun 19, 00:14 UTC23h 54m

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 1h ago.
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, ETH715, ETH714, ETH553.