Apparatus

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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 5h ago
Flights observed
58
Distinct callsigns
10
Country
ET
Last broadcast
5h ago

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 10 distinct

Callsign Airline Flights Last seen
ETH637 Ethiopian Airlines 15 2026-05-22
ETH607 Ethiopian Airlines 11 2026-05-29
ETH636 Ethiopian Airlines 9 2026-05-20
ETH606 Ethiopian Airlines 7 2026-05-29
ETH640 Ethiopian Airlines 3 2026-05-04
ETH603 Ethiopian Airlines 3 2026-04-20
ETH602 Ethiopian Airlines 3 2026-04-20
ETH318 Ethiopian Airlines 3 2026-05-26
ETH909 Ethiopian Airlines 2 2026-05-03
ETH611 Ethiopian Airlines 2 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ETH607 CAN → ADD May 29, 03:45 UTCMay 29, 23:55 UTC20h 10m
2026-05-29 ETH607 CAN → ADD May 29, 02:50 UTCMay 29, 23:55 UTC21h 5m
2026-05-29 ETH606 ADD → CAN May 29, 00:45 UTCMay 29, 23:30 UTC22h 45m
2026-05-27 ETH607 CAN → ADD May 27, 18:45 UTCMay 27, 19:20 UTC35m
2026-05-27 ETH606 ADD → CAN May 27, 00:55 UTCMay 27, 03:39 UTC2h 45m
2026-05-26 ETH318 ADD → NBO May 26, 09:40 UTCMay 26, 09:49 UTC10m
2026-05-24 ETH607 CAN → ADD May 24, 18:40 UTCMay 24, 21:50 UTC3h 10m
2026-05-24 ETH607 CAN → ADD May 24, 17:15 UTCMay 24, 17:25 UTC10m
2026-05-24 ETH606 ADD → CAN May 24, 01:10 UTCMay 24, 04:20 UTC3h 10m
2026-05-23 ETH318 ADD → NBO May 23, 09:50 UTCMay 23, 10:00 UTC10m
2026-05-22 ETH637 TFU → ADD May 22, 04:20 UTCMay 22, 23:10 UTC18h 50m
2026-05-22 ETH637 TFU → ADD May 22, 02:05 UTCMay 22, 23:10 UTC21h 5m
2026-05-20 ETH637 TFU → ADD May 20, 04:00 UTCMay 20, 23:00 UTC19h 1m
2026-05-20 ETH636 ADD → TFU May 20, 01:55 UTCMay 20, 23:00 UTC21h 6m
2026-05-18 ETH637 TFU → ADD May 18, 04:11 UTCMay 18, 23:05 UTC18h 54m
2026-05-18 ETH637 TFU → ADD May 18, 02:10 UTCMay 18, 23:05 UTC20h 54m
2026-05-17 ETH636 ADD → TFU May 17, 08:25 UTCMay 18, 04:51 UTC20h 26m
2026-05-15 ETH637 TFU → ADD May 15, 03:35 UTCMay 15, 22:45 UTC19h 9m
2026-05-15 ETH637 TFU → ADD May 15, 03:25 UTCMay 15, 22:45 UTC19h 19m
2026-05-14 ETH318 ADD → NBO May 14, 09:30 UTCMay 14, 09:50 UTC20m
2026-05-11 ETH607 CAN → ADD May 11, 18:30 UTCMay 11, 22:00 UTC3h 30m
2026-05-11 ETH606 ADD → CAN May 11, 03:15 UTCMay 11, 04:10 UTC55m
2026-05-09 ETH607 CAN → ADD May 9, 18:25 UTCMay 9, 21:55 UTC3h 30m
2026-05-09 ETH607 CAN → ADD May 9, 16:55 UTCMay 9, 17:05 UTC10m
2026-05-09 ETH606 ADD → CAN May 9, 02:40 UTCMay 9, 03:40 UTC1h 0m
2026-05-04 ETH611 BOM → ADD May 4, 23:35 UTCMay 5, 00:05 UTC30m
2026-05-04 ETH640 ADD → BOM May 4, 19:20 UTCMay 4, 20:10 UTC50m
2026-05-03 ETH640 ADD → BOM May 3, 21:50 UTCMay 4, 20:10 UTC22h 21m
2026-05-03 ETH909 ADD → BKO May 3, 19:20 UTCMay 3, 20:00 UTC40m
2026-05-02 ETH909 ADD → BKO May 2, 22:40 UTCMay 3, 20:00 UTC21h 19m
2026-05-01 ETH637 TFU → ADD May 1, 03:45 UTCMay 1, 23:15 UTC19h 30m
2026-05-01 ETH637 TFU → ADD May 1, 02:00 UTCMay 1, 23:15 UTC21h 15m
2026-04-30 ETH636 ADD → TFU Apr 30, 13:50 UTCMay 1, 05:00 UTC15h 10m
2026-04-29 ETH637 TFU → ADD Apr 29, 19:40 UTCApr 30, 11:50 UTC16h 10m
2026-04-29 ETH637 TFU → ADD Apr 29, 03:34 UTCApr 29, 22:55 UTC19h 21m
2026-04-29 ETH636 ADD → TFU Apr 29, 01:45 UTCApr 29, 22:55 UTC21h 11m
2026-04-28 ETH636 ADD → TFU Apr 28, 13:45 UTCApr 29, 04:49 UTC15h 5m
2026-04-27 ETH637 TFU → ADD Apr 27, 20:05 UTCApr 28, 11:25 UTC15h 20m
2026-04-27 ETH637 TFU → ADD Apr 27, 03:35 UTCApr 27, 23:05 UTC19h 30m
2026-04-27 ETH637 TFU → ADD Apr 27, 03:25 UTCApr 27, 23:05 UTC19h 40m
2026-04-26 ETH636 ADD → TFU Apr 26, 13:35 UTCApr 27, 04:20 UTC14h 45m
2026-04-25 ETH607 CAN → ADD Apr 25, 18:45 UTCApr 26, 11:30 UTC16h 45m
2026-04-25 ETH607 CAN → ADD Apr 25, 17:05 UTCApr 25, 17:15 UTC10m
2026-04-24 ETH606 ADD → CAN Apr 24, 13:30 UTCApr 25, 03:55 UTC14h 25m
2026-04-23 ETH607 CAN → ADD Apr 23, 17:40 UTCApr 24, 11:25 UTC17h 45m
2026-04-22 ETH606 ADD → CAN Apr 22, 13:35 UTCApr 23, 04:10 UTC14h 35m
2026-04-21 ETH611 BOM → ADD Apr 21, 22:50 UTCApr 22, 11:30 UTC12h 40m
2026-04-21 ETH640 ADD → BOM Apr 21, 06:20 UTCApr 21, 20:00 UTC13h 40m
2026-04-20 ETH603 DXB → ADD Apr 20, 13:30 UTCApr 20, 14:00 UTC30m
2026-04-20 ETH602 ADD → DXB Apr 20, 11:10 UTCApr 20, 11:40 UTC30m

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 5h ago.
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 10 distinct callsigns, including ETH637, ETH607, ETH636, ETH606, ETH640.