Apparatus

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sensors Mode-S transponder

040151

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-AVI · BOEING 737 MAX 8

Hex
040151
Octal
01000521
Decimal
262,481
Country
ET
Tail
ET-AVI
Type
B38M
No current signal · last broadcast 10d ago
Flights observed
67
Distinct callsigns
20
Country
ET
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S 040151.

Country allocation

The ICAO 24-bit address 040151 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
ETH406 Ethiopian Airlines 11 2026-05-24
ETH407 Ethiopian Airlines 9 2026-05-24
ETH962 - 3 2026-06-15
ETH691 Ethiopian Airlines 3 2026-07-24
ETH690 Ethiopian Airlines 3 2026-07-24
ETH963 - 2 2026-06-14
ETH928 - 2 2026-07-07
ETH739 - 2 2026-06-30
ETH723 Ethiopian Airlines 2 2026-07-23
ETH721 Ethiopian Airlines 2 2026-07-16
ETH720 Ethiopian Airlines 2 2026-07-23
ETH688 Ethiopian Airlines 2 2026-06-13
ETH686 - 2 2026-06-12
ETH682 - 2 2026-07-01
ETH429 Ethiopian Airlines 2 2026-06-26
ETH423 Ethiopian Airlines 2 2026-04-25
ETH904 - 1 2026-07-09
ETH859 Ethiopian Airlines 1 2026-06-11
ETH765 - 1 2026-07-11
ETH764 - 1 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 ETH691 BLR → ADD Jul 24, 10:40 UTCJul 24, 10:55 UTC15m
2026-07-24 ETH690 ADD → BLR Jul 24, 03:25 UTCJul 24, 03:50 UTC25m
2026-07-23 ETH723 IST → ADD Jul 23, 06:20 UTCJul 24, 03:50 UTC21h 30m
2026-07-23 ETH723 IST → ADD Jul 23, 05:25 UTCJul 24, 03:50 UTC22h 25m
2026-07-23 ETH720 ADD → IST Jul 23, 00:05 UTCJul 23, 01:50 UTC1h 45m
2026-07-20 ETH695 - Jul 20, 14:25 UTCJul 20, 14:35 UTC10m
2026-07-17 ETH600 - Jul 17, 23:10 UTCJul 17, 23:55 UTC45m
2026-07-16 ETH721 IST → ADD Jul 16, 21:30 UTCJul 16, 23:15 UTC1h 45m
2026-07-16 ETH722 - Jul 16, 02:05 UTCJul 16, 18:19 UTC16h 15m
2026-07-13 ETH721 - Jul 13, 21:35 UTCJul 13, 23:35 UTC2h 0m
2026-07-12 ETH720 - Jul 12, 23:35 UTCJul 13, 01:25 UTC1h 50m
2026-07-11 ETH308 - Jul 11, 22:30 UTCJul 11, 22:40 UTC10m
2026-07-11 ETH765 - Jul 11, 13:25 UTCJul 11, 15:05 UTC1h 40m
2026-07-11 ETH764 - Jul 11, 10:25 UTCJul 11, 11:10 UTC45m
2026-07-10 ETH691 - Jul 10, 10:55 UTCJul 10, 11:10 UTC15m
2026-07-10 ETH690 - Jul 10, 01:55 UTCJul 10, 02:15 UTC20m
2026-07-09 ETH904 - Jul 9, 05:45 UTCJul 9, 06:15 UTC30m
2026-07-07 ETH928 - Jul 7, 21:45 UTCJul 7, 22:20 UTC35m
2026-07-03 ETH928 - Jul 3, 07:35 UTCJul 3, 22:20 UTC14h 45m
2026-07-01 ETH682 - Jul 1, 18:15 UTCJul 1, 22:45 UTC4h 30m
2026-06-30 ETH682 - Jun 30, 22:40 UTCJul 1, 22:10 UTC23h 30m
2026-06-30 ETH739 - Jun 30, 20:20 UTCJul 1, 18:55 UTC22h 35m
2026-06-30 ETH739 - Jun 30, 19:30 UTCJul 1, 18:15 UTC22h 45m
2026-06-30 ETH738 - Jun 30, 00:49 UTCJun 30, 04:10 UTC3h 21m
2026-06-26 ETH429 AMM → ADD Jun 26, 00:45 UTCJun 26, 00:59 UTC15m
2026-06-25 ETH428 ADD → AMM Jun 25, 22:45 UTCJun 25, 23:05 UTC20m
2026-06-15 ETH962 - Jun 15, 01:25 UTCJun 15, 01:50 UTC25m
2026-06-14 ETH963 - Jun 14, 23:05 UTCJun 14, 23:35 UTC29m
2026-06-13 ETH687 DEL → ADD Jun 13, 21:30 UTCJun 13, 22:00 UTC30m
2026-06-13 ETH688 ADD → DEL Jun 13, 19:10 UTCJun 13, 19:50 UTC40m
2026-06-12 ETH688 ADD → DEL Jun 12, 22:20 UTCJun 13, 19:50 UTC21h 29m
2026-06-12 ETH689 DEL → ADD Jun 12, 04:45 UTCJun 12, 22:35 UTC17h 50m
2026-06-12 ETH686 - Jun 12, 01:55 UTCJun 12, 02:50 UTC55m
2026-06-11 ETH686 - Jun 11, 06:30 UTCJun 12, 02:50 UTC20h 21m
2026-06-11 ETH859 ADD → JNB Jun 11, 01:45 UTCJun 11, 02:20 UTC35m
2026-06-05 ETH415 TLV → ADD Jun 5, 05:00 UTCJun 5, 05:20 UTC20m
2026-06-05 ETH404 ADD → TLV Jun 5, 02:30 UTCJun 5, 03:05 UTC35m
2026-05-30 ETH962 DLA → ADD May 30, 00:50 UTCMay 30, 01:20 UTC30m
2026-05-29 ETH963 ADD → DLA May 29, 23:05 UTCMay 29, 23:25 UTC20m
2026-05-24 ETH407 BEY → ADD May 24, 12:55 UTCMay 24, 13:50 UTC55m
2026-05-24 ETH406 ADD → BEY May 24, 10:20 UTCMay 24, 11:05 UTC45m
2026-05-23 ETH406 ADD → BEY May 23, 13:35 UTCMay 24, 11:05 UTC21h 30m
2026-05-23 ETH406 ADD → BEY May 23, 10:20 UTCMay 23, 11:10 UTC50m
2026-05-23 ETH429 AMM → ADD May 23, 00:40 UTCMay 23, 00:55 UTC15m
2026-05-22 ETH407 BEY → ADD May 22, 13:05 UTCMay 22, 23:15 UTC10h 10m
2026-05-22 ETH406 ADD → BEY May 22, 01:20 UTCMay 22, 11:40 UTC10h 20m
2026-05-21 ETH407 BEY → ADD May 21, 12:45 UTCMay 21, 22:50 UTC10h 5m
2026-05-21 ETH406 ADD → BEY May 21, 00:45 UTCMay 21, 11:05 UTC10h 20m
2026-05-20 ETH407 BEY → ADD May 20, 13:00 UTCMay 20, 23:00 UTC10h 0m
2026-05-20 ETH406 ADD → BEY May 20, 10:35 UTCMay 20, 11:25 UTC50m

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

Mode-S 040151 frequently asked

What is Mode-S code 040151?
040151 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AVI.
Where is Mode-S 040151 registered?
Mode-S code 040151 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040151 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040151, octal 01000521, decimal 262,481.
What flights does 040151 operate?
Mode-S 040151 has broadcast 20 distinct callsigns, including ETH406, ETH407, ETH962, ETH691, ETH690.