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sensors Mode-S transponder

04012B

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-ATR · AIRBUS A-350-900

Hex
04012B
Octal
01000453
Decimal
262,443
Country
ET
Tail
ET-ATR
Type
A359
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
172
Distinct callsigns
20
Country
ET
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 04012B.

Country allocation

The ICAO 24-bit address 04012B 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
ETH639 - 19 2026-07-17
ETH638 - 19 2026-07-17
ETH727 Ethiopian Airlines 12 2026-05-25
ETH726 Ethiopian Airlines 12 2026-05-25
ETH645 Ethiopian Airlines 11 2026-07-24
ETH644 Ethiopian Airlines 9 2026-07-24
ETH750 - 6 2026-07-05
ETH737 Ethiopian Airlines 6 2026-04-26
ETH729 Ethiopian Airlines 6 2026-05-31
ETH605 Ethiopian Airlines 6 2026-07-26
ETH925 Ethiopian Airlines 5 2026-07-22
ETH736 Ethiopian Airlines 5 2026-04-26
ETH685 Ethiopian Airlines 5 2026-06-16
ETH604 Ethiopian Airlines 5 2026-07-26
ETH955 Ethiopian Airlines 4 2026-06-11
ETH751 Ethiopian Airlines 4 2026-07-05
ETH728 Ethiopian Airlines 4 2026-04-24
ETH713 Ethiopian Airlines 4 2026-05-29
ETH735 Ethiopian Airlines 3 2026-06-30
ETH734 - 3 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ETH605 PEK → ADD Jul 26, 16:35 UTCJul 26, 22:45 UTC6h 10m
2026-07-26 ETH604 ADD → PEK Jul 26, 08:15 UTCJul 26, 08:30 UTC15m
2026-07-24 ETH645 HKG → ADD Jul 24, 18:55 UTCJul 25, 09:30 UTC14h 35m
2026-07-24 ETH645 HKG → ADD Jul 24, 17:10 UTCJul 24, 17:25 UTC15m
2026-07-24 ETH645 HKG → ADD Jul 24, 15:00 UTCJul 24, 15:30 UTC30m
2026-07-24 ETH645 HKG → ADD Jul 24, 13:30 UTCJul 24, 14:10 UTC40m
2026-07-24 ETH644 HKG → MNL Jul 24, 09:40 UTCJul 24, 11:25 UTC1h 45m
2026-07-24 ETH644 HKG → MNL Jul 24, 07:25 UTCJul 24, 07:55 UTC30m
2026-07-24 ETH644 HKG → MNL Jul 24, 01:55 UTCJul 24, 05:45 UTC3h 50m
2026-07-22 ETH925 NSI → ADD Jul 22, 15:00 UTCJul 22, 15:05 UTC5m
2026-07-21 ETH452 ADD → CAI Jul 21, 22:35 UTCJul 21, 22:55 UTC20m
2026-07-19 ETH645 - Jul 19, 17:30 UTCJul 19, 22:05 UTC4h 35m
2026-07-19 ETH645 - Jul 19, 16:45 UTCJul 19, 16:55 UTC10m
2026-07-19 ETH645 - Jul 19, 13:30 UTCJul 19, 15:10 UTC1h 40m
2026-07-19 ETH644 HKG → MNL Jul 19, 09:25 UTCJul 19, 11:15 UTC1h 50m
2026-07-19 ETH644 HKG → MNL Jul 19, 06:55 UTCJul 19, 07:35 UTC40m
2026-07-18 ETH644 HKG → MNL Jul 18, 15:45 UTCJul 19, 04:55 UTC13h 10m
2026-07-17 ETH639 - Jul 17, 21:25 UTCJul 18, 15:45 UTC18h 21m
2026-07-17 ETH639 - Jul 17, 18:50 UTCJul 18, 15:45 UTC20h 56m
2026-07-17 ETH639 - Jul 17, 18:19 UTCJul 17, 21:50 UTC3h 30m
2026-07-17 ETH639 - Jul 17, 15:29 UTCJul 17, 16:10 UTC40m
2026-07-17 ETH638 - Jul 17, 08:20 UTCJul 17, 09:04 UTC45m
2026-07-17 ETH638 - Jul 17, 05:45 UTCJul 17, 06:45 UTC1h 0m
2026-07-16 ETH638 - Jul 16, 08:50 UTCJul 17, 06:45 UTC21h 55m
2026-07-15 ETH909 - Jul 15, 16:50 UTCJul 15, 17:30 UTC40m
2026-07-11 ETH605 - Jul 11, 18:25 UTCJul 12, 00:40 UTC6h 15m
2026-07-11 ETH604 - Jul 11, 08:20 UTCJul 11, 08:35 UTC15m
2026-07-10 ETH925 - Jul 10, 16:50 UTCJul 11, 03:55 UTC11h 5m
2026-07-10 ETH925 - Jul 10, 13:20 UTCJul 10, 13:55 UTC35m
2026-07-09 ETH639 - Jul 9, 18:20 UTCJul 10, 11:20 UTC17h 0m
2026-07-09 ETH639 - Jul 9, 15:40 UTCJul 9, 16:10 UTC30m
2026-07-09 ETH638 - Jul 9, 08:30 UTCJul 9, 09:15 UTC45m
2026-07-09 ETH638 - Jul 9, 02:20 UTCJul 9, 06:45 UTC4h 25m
2026-07-07 ETH639 KUL → SIN Jul 7, 18:50 UTCJul 8, 13:10 UTC18h 20m
2026-07-07 ETH639 KUL → SIN Jul 7, 18:25 UTCJul 8, 13:10 UTC18h 45m
2026-07-07 ETH639 KUL → SIN Jul 7, 15:30 UTCJul 7, 16:20 UTC50m
2026-07-07 ETH638 - Jul 7, 08:25 UTCJul 7, 09:10 UTC45m
2026-07-07 ETH638 - Jul 7, 02:15 UTCJul 7, 06:45 UTC4h 30m
2026-07-06 ETH638 - Jul 6, 09:25 UTCJul 7, 06:45 UTC21h 20m
2026-07-06 ETH638 - Jul 6, 07:05 UTCJul 7, 06:45 UTC23h 40m
2026-07-05 ETH751 BRU → ADD Jul 5, 19:55 UTCJul 6, 09:30 UTC13h 35m
2026-07-05 ETH750 - Jul 5, 04:25 UTCJul 5, 05:15 UTC50m
2026-07-03 ETH751 BRU → ADD Jul 3, 19:50 UTCJul 3, 23:10 UTC3h 20m
2026-07-03 ETH750 - Jul 3, 01:40 UTCJul 3, 04:55 UTC3h 15m
2026-07-02 ETH453 - Jul 2, 00:55 UTCJul 2, 01:10 UTC15m
2026-06-30 ETH735 CDG → ADD Jun 30, 20:10 UTCJun 30, 23:45 UTC3h 35m
2026-06-30 ETH734 - Jun 30, 00:14 UTCJun 30, 04:15 UTC4h 1m
2026-06-27 ETH639 KUL → SIN Jun 27, 18:20 UTCJun 27, 21:59 UTC3h 40m
2026-06-27 ETH639 KUL → SIN Jun 27, 15:24 UTCJun 27, 16:10 UTC45m
2026-06-27 ETH638 - Jun 27, 08:35 UTCJun 27, 09:19 UTC45m

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

Mode-S 04012B frequently asked

What is Mode-S code 04012B?
04012B is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-ATR.
Where is Mode-S 04012B registered?
Mode-S code 04012B is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 04012B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 04012B, octal 01000453, decimal 262,443.
What flights does 04012B operate?
Mode-S 04012B has broadcast 20 distinct callsigns, including ETH639, ETH638, ETH727, ETH726, ETH645.