Apparatus

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sensors Mode-S transponder

040077

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-AQN · BOEING 737-800

Hex
040077
Octal
01000167
Decimal
262,263
Country
ET
Tail
ET-AQN
Type
B738
No current signal · last broadcast Jul 23, 13:30 UTC
Flights observed
78
Distinct callsigns
15
Country
ET
Last broadcast
Jul 23, 13:30 UTC

Last known position

Most recent position reported by Mode-S 040077.

Country allocation

The ICAO 24-bit address 040077 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 15 distinct

Callsign Airline Flights Last seen
ETH415 - 10 2026-07-04
ETH424 - 9 2026-07-17
ETH414 Ethiopian Airlines 8 2026-06-19
ETH431 Ethiopian Airlines 7 2026-07-23
ETH430 - 7 2026-07-23
ETH418 Ethiopian Airlines 7 2026-05-29
ETH419 Ethiopian Airlines 6 2026-05-29
ETH425 - 5 2026-07-17
ETH404 - 5 2026-07-04
ETH429 - 4 2026-07-11
ETH428 - 4 2026-07-10
ETH308 - 2 2026-07-15
ETH855 Ethiopian Airlines 1 2026-05-03
ETH405 Ethiopian Airlines 1 2026-06-19
ET415 Ethiopian Airlines 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 ETH431 AMM → ADD Jul 23, 13:15 UTCJul 23, 13:30 UTC15m
2026-07-23 ETH430 - Jul 23, 10:50 UTCJul 23, 11:10 UTC20m
2026-07-19 ETH431 - Jul 19, 13:35 UTCJul 19, 13:55 UTC20m
2026-07-19 ETH430 - Jul 19, 10:45 UTCJul 19, 11:00 UTC15m
2026-07-17 ETH425 - Jul 17, 05:04 UTCJul 17, 05:25 UTC20m
2026-07-17 ETH424 - Jul 17, 02:54 UTCJul 17, 03:45 UTC50m
2026-07-16 ETH424 - Jul 16, 23:10 UTCJul 17, 00:50 UTC1h 40m
2026-07-15 ETH308 - Jul 15, 22:30 UTCJul 15, 22:40 UTC10m
2026-07-11 ETH429 - Jul 11, 00:45 UTCJul 11, 01:05 UTC20m
2026-07-10 ETH428 - Jul 10, 23:15 UTCJul 10, 23:40 UTC25m
2026-07-07 ETH308 ADD → NBO Jul 7, 22:30 UTCJul 7, 22:50 UTC20m
2026-07-05 ETH425 - Jul 5, 01:00 UTCJul 5, 01:20 UTC20m
2026-07-04 ETH424 - Jul 4, 22:50 UTCJul 4, 23:20 UTC30m
2026-07-04 ETH415 - Jul 4, 04:55 UTCJul 4, 05:20 UTC25m
2026-07-04 ETH404 - Jul 4, 02:25 UTCJul 4, 03:00 UTC35m
2026-07-02 ETH429 - Jul 2, 00:25 UTCJul 2, 00:40 UTC15m
2026-07-01 ETH428 - Jul 1, 22:45 UTCJul 1, 23:05 UTC20m
2026-06-27 - - Jun 27, 21:15 UTCJun 28, 03:09 UTC5h 55m
2026-06-25 ETH415 - Jun 25, 05:20 UTCJun 25, 05:44 UTC25m
2026-06-25 ETH404 ADD → TLV Jun 25, 02:25 UTCJun 25, 02:59 UTC35m
2026-06-19 ETH405 TLV → ADD Jun 19, 22:19 UTCJun 19, 22:45 UTC25m
2026-06-19 ETH414 ADD → TLV Jun 19, 00:49 UTCJun 19, 19:45 UTC18h 55m
2026-06-18 ETH424 ADD → BAH Jun 18, 23:00 UTCJun 18, 23:20 UTC20m
2026-06-14 ETH431 AMM → ADD Jun 14, 13:10 UTCJun 14, 13:20 UTC10m
2026-06-14 ETH430 ADD → AMM Jun 14, 10:40 UTCJun 14, 11:00 UTC20m
2026-06-13 ETH429 AMM → ADD Jun 13, 00:25 UTCJun 13, 00:40 UTC15m
2026-06-12 ETH428 ADD → AMM Jun 12, 22:55 UTCJun 12, 23:05 UTC10m
2026-06-04 ETH424 ADD → BAH Jun 4, 22:55 UTCJun 4, 23:25 UTC30m
2026-06-04 ETH429 AMM → ADD Jun 4, 00:25 UTCJun 4, 00:40 UTC15m
2026-06-03 ETH428 ADD → AMM Jun 3, 13:10 UTCJun 3, 23:00 UTC9h 50m
2026-06-03 ETH430 ADD → AMM Jun 3, 10:30 UTCJun 3, 10:55 UTC25m
2026-06-03 ETH425 BAH → ADD Jun 3, 00:55 UTCJun 3, 01:10 UTC15m
2026-06-02 ETH424 ADD → BAH Jun 2, 13:05 UTCJun 2, 22:55 UTC9h 50m
2026-05-29 ETH419 TLV → ADD May 29, 13:40 UTCMay 30, 08:35 UTC18h 55m
2026-05-29 ETH418 ADD → TLV May 29, 00:15 UTCMay 29, 12:00 UTC11h 45m
2026-05-28 ETH424 ADD → BAH May 28, 22:35 UTCMay 28, 22:55 UTC20m
2026-05-28 ETH415 TLV → ADD May 28, 05:00 UTCMay 28, 05:25 UTC25m
2026-05-28 ETH404 ADD → TLV May 28, 02:25 UTCMay 28, 03:00 UTC35m
2026-05-24 ETH431 AMM → ADD May 24, 13:10 UTCMay 24, 23:20 UTC10h 10m
2026-05-24 ETH430 ADD → AMM May 24, 10:35 UTCMay 24, 10:55 UTC20m
2026-05-12 ETH430 ADD → AMM May 12, 10:30 UTCMay 13, 08:10 UTC21h 40m
2026-05-07 ETH415 TLV → ADD May 7, 05:05 UTCMay 7, 05:30 UTC25m
2026-05-06 ETH404 ADD → TLV May 6, 08:05 UTCMay 7, 03:05 UTC18h 59m
2026-05-06 ETH425 BAH → ADD May 6, 00:25 UTCMay 6, 08:05 UTC7h 40m
2026-05-05 ETH424 ADD → BAH May 5, 22:40 UTCMay 5, 23:05 UTC25m
2026-05-05 ETH415 TLV → ADD May 5, 05:10 UTCMay 5, 05:35 UTC25m
2026-05-04 ETH404 ADD → TLV May 4, 08:05 UTCMay 5, 03:20 UTC19h 16m
2026-05-03 ETH855 ADD → JRO May 3, 22:49 UTCMay 4, 08:05 UTC9h 15m
2026-05-03 ETH431 AMM → ADD May 3, 13:10 UTCMay 4, 08:05 UTC18h 55m
2026-05-03 ETH425 BAH → ADD May 3, 01:00 UTCMay 3, 22:54 UTC21h 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-AQN page for operator, model, and routing details .

Mode-S 040077 frequently asked

What is Mode-S code 040077?
040077 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AQN.
Where is Mode-S 040077 registered?
Mode-S code 040077 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040077 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 13:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040077, octal 01000167, decimal 262,263.
What flights does 040077 operate?
Mode-S 040077 has broadcast 15 distinct callsigns, including ETH415, ETH424, ETH414, ETH431, ETH430.