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sensors Mode-S transponder

040066

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-APY · BOEING 777-300ER

Hex
040066
Octal
01000146
Decimal
262,246
Country
ET
Tail
ET-APY
Type
B77W
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
135
Distinct callsigns
13
Country
ET
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S 040066.

Country allocation

The ICAO 24-bit address 040066 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 13 distinct

Callsign Airline Flights Last seen
ETH607 - 33 2026-07-21
ETH637 Ethiopian Airlines 27 2026-07-24
ETH606 Ethiopian Airlines 20 2026-07-26
ETH636 Ethiopian Airlines 18 2026-07-24
ETH318 - 9 2026-07-12
ETH640 - 7 2026-06-24
ETH611 - 6 2026-06-24
ETH610 - 4 2026-06-24
ETH603 Ethiopian Airlines 3 2026-04-20
ETH602 Ethiopian Airlines 3 2026-04-20
ETH909 Ethiopian Airlines 2 2026-05-03
ETH846 - 1 2026-06-30
ETH600 Ethiopian Airlines 1 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ETH606 ADD → CAN Jul 26, 01:15 UTCJul 26, 21:30 UTC20h 16m
2026-07-24 ETH637 TFU → ADD Jul 24, 04:15 UTCJul 24, 22:50 UTC18h 35m
2026-07-24 ETH636 ADD → TFU Jul 24, 02:20 UTCJul 24, 22:50 UTC20h 30m
2026-07-22 ETH600 ADD → DXB Jul 22, 23:10 UTCJul 22, 23:35 UTC25m
2026-07-21 ETH607 - Jul 21, 03:35 UTCJul 21, 21:40 UTC18h 5m
2026-07-21 ETH607 - Jul 21, 01:35 UTCJul 21, 21:40 UTC20h 5m
2026-07-21 ETH606 ADD → CAN Jul 21, 01:00 UTCJul 21, 21:40 UTC20h 40m
2026-07-19 ETH637 TFU → ADD Jul 19, 03:55 UTCJul 19, 22:20 UTC18h 25m
2026-07-19 ETH636 ADD → TFU Jul 19, 02:00 UTCJul 19, 22:20 UTC20h 20m
2026-07-17 ETH637 TFU → ADD Jul 17, 03:34 UTCJul 17, 22:40 UTC19h 5m
2026-07-17 ETH636 ADD → TFU Jul 17, 01:39 UTCJul 17, 22:40 UTC21h 0m
2026-07-16 ETH636 ADD → TFU Jul 16, 14:00 UTCJul 17, 05:20 UTC15h 20m
2026-07-15 ETH607 - Jul 15, 19:00 UTCJul 16, 11:40 UTC16h 40m
2026-07-15 ETH606 - Jul 15, 03:35 UTCJul 15, 22:25 UTC18h 50m
2026-07-15 ETH606 - Jul 15, 01:35 UTCJul 15, 22:25 UTC20h 50m
2026-07-15 ETH606 - Jul 15, 00:55 UTCJul 15, 22:25 UTC21h 30m
2026-07-13 ETH607 - Jul 13, 03:40 UTCJul 13, 22:45 UTC19h 5m
2026-07-13 ETH607 - Jul 13, 01:35 UTCJul 13, 22:45 UTC21h 10m
2026-07-13 ETH606 - Jul 13, 00:55 UTCJul 13, 22:45 UTC21h 50m
2026-07-12 ETH318 - Jul 12, 09:45 UTCJul 12, 09:55 UTC10m
2026-07-11 ETH607 - Jul 11, 18:45 UTCJul 11, 22:20 UTC3h 35m
2026-07-11 ETH606 - Jul 11, 02:00 UTCJul 11, 05:50 UTC3h 50m
2026-07-09 ETH607 - Jul 9, 19:05 UTCJul 9, 22:50 UTC3h 45m
2026-07-09 ETH606 - Jul 9, 01:05 UTCJul 9, 04:45 UTC3h 40m
2026-07-07 ETH607 CAN → ADD Jul 7, 03:35 UTCJul 7, 21:45 UTC18h 10m
2026-07-07 ETH606 - Jul 7, 01:35 UTCJul 7, 21:45 UTC20h 10m
2026-07-06 - - Jul 6, 09:30 UTCJul 6, 09:45 UTC15m
2026-07-05 ETH637 - Jul 5, 03:45 UTCJul 5, 22:50 UTC19h 5m
2026-07-05 ETH636 - Jul 5, 01:50 UTCJul 5, 22:50 UTC21h 0m
2026-07-04 ETH636 - Jul 4, 13:40 UTCJul 5, 05:25 UTC15h 45m
2026-07-03 ETH637 - Jul 3, 19:35 UTCJul 4, 11:40 UTC16h 5m
2026-07-03 ETH637 - Jul 3, 03:40 UTCJul 3, 22:55 UTC19h 15m
2026-07-03 ETH636 - Jul 3, 01:50 UTCJul 3, 22:55 UTC21h 5m
2026-06-30 ETH846 - Jun 30, 13:05 UTCJun 30, 13:30 UTC25m
2026-06-29 ETH607 CAN → ADD Jun 29, 18:25 UTCJun 30, 11:40 UTC17h 16m
2026-06-29 ETH607 CAN → ADD Jun 29, 16:55 UTCJun 30, 11:40 UTC18h 46m
2026-06-29 ETH606 - Jun 29, 01:00 UTCJun 29, 04:39 UTC3h 40m
2026-06-28 ETH318 - Jun 28, 10:00 UTCJun 28, 10:10 UTC10m
2026-06-27 ETH607 CAN → ADD Jun 27, 05:35 UTCJun 27, 23:34 UTC18h 0m
2026-06-27 ETH607 CAN → ADD Jun 27, 03:34 UTCJun 27, 23:34 UTC20h 0m
2026-06-27 ETH607 CAN → ADD Jun 27, 01:35 UTCJun 27, 23:34 UTC22h 0m
2026-06-27 ETH607 CAN → ADD Jun 27, 00:55 UTCJun 27, 23:29 UTC22h 35m
2026-06-24 ETH611 - Jun 24, 22:45 UTCJun 24, 23:14 UTC30m
2026-06-24 ETH640 - Jun 24, 06:10 UTCJun 24, 20:20 UTC14h 10m
2026-06-24 ETH610 - Jun 24, 01:49 UTCJun 24, 02:45 UTC55m
2026-06-23 ETH318 - Jun 23, 09:24 UTCJun 23, 09:40 UTC15m
2026-06-22 ETH607 CAN → ADD Jun 22, 17:10 UTCJun 22, 21:45 UTC4h 35m
2026-06-22 ETH606 - Jun 22, 00:50 UTCJun 22, 03:45 UTC2h 55m
2026-06-20 ETH607 CAN → ADD Jun 20, 20:34 UTCJun 20, 22:25 UTC1h 50m
2026-06-20 ETH607 CAN → ADD Jun 20, 02:44 UTCJun 20, 20:29 UTC17h 45m

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

Mode-S 040066 frequently asked

What is Mode-S code 040066?
040066 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-APY.
Where is Mode-S 040066 registered?
Mode-S code 040066 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040066 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040066, octal 01000146, decimal 262,246.
What flights does 040066 operate?
Mode-S 040066 has broadcast 13 distinct callsigns, including ETH607, ETH637, ETH606, ETH636, ETH318.