Apparatus

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sensors Mode-S transponder

04021D

ICAO 24-bit transponder address · allocated to Ethiopia

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

Hex
04021D
Octal
01001035
Decimal
262,685
Country
ET
Tail
ET-AZN
Type
A359
No current signal · last broadcast 6h ago
Flights observed
135
Distinct callsigns
20
Country
ET
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 04021D.

Country allocation

The ICAO 24-bit address 04021D 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
ETH685 - 19 2026-07-15
ETH684 - 9 2026-07-15
ETH706 - 8 2026-07-09
ETH712 Ethiopian Airlines 7 2026-05-26
ETH707 - 7 2026-07-09
ETH713 Ethiopian Airlines 6 2026-05-26
ETH506 Ethiopian Airlines 6 2026-04-23
ETH500 - 6 2026-07-17
ETH751 - 5 2026-07-13
ETH507 Ethiopian Airlines 5 2026-04-24
ETH750 - 4 2026-07-13
ETH604 - 4 2026-06-22
ETH553 Ethiopian Airlines 4 2026-05-05
ETH955 - 3 2026-06-16
ETH735 Ethiopian Airlines 3 2026-06-17
ETH734 - 3 2026-06-16
ETH726 Ethiopian Airlines 3 2026-05-07
ETH673 Ethiopian Airlines 3 2026-04-16
ETH672 Ethiopian Airlines 3 2026-04-16
ETH501 - 3 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 ETH501 - Jul 17, 15:10 UTCJul 18, 00:55 UTC9h 45m
2026-07-17 ETH500 - Jul 17, 03:45 UTCJul 17, 12:30 UTC8h 45m
2026-07-16 ETH500 - Jul 16, 23:55 UTCJul 17, 01:59 UTC2h 5m
2026-07-15 ETH685 - Jul 15, 20:45 UTCJul 15, 23:45 UTC3h 0m
2026-07-15 ETH685 - Jul 15, 03:20 UTCJul 15, 23:45 UTC20h 25m
2026-07-15 ETH684 - Jul 15, 01:20 UTCJul 15, 23:45 UTC22h 25m
2026-07-15 ETH684 - Jul 15, 00:55 UTCJul 15, 23:15 UTC22h 20m
2026-07-14 ETH684 - Jul 14, 13:55 UTCJul 15, 04:40 UTC14h 44m
2026-07-13 ETH751 - Jul 13, 20:05 UTCJul 14, 14:30 UTC18h 25m
2026-07-13 ETH750 - Jul 13, 01:05 UTCJul 13, 05:10 UTC4h 5m
2026-07-11 ETH848 - Jul 11, 06:45 UTCJul 11, 07:10 UTC25m
2026-07-10 ETH859 - Jul 10, 14:45 UTCJul 11, 02:25 UTC11h 40m
2026-07-09 ETH707 - Jul 9, 20:50 UTCJul 10, 15:05 UTC18h 15m
2026-07-09 ETH706 - Jul 9, 01:10 UTCJul 9, 04:15 UTC3h 5m
2026-07-07 ETH707 FRA → ADD Jul 7, 20:30 UTCJul 7, 23:30 UTC3h 0m
2026-07-07 ETH706 - Jul 7, 01:00 UTCJul 7, 04:05 UTC3h 5m
2026-07-05 ETH685 PVG → ADD Jul 5, 20:15 UTCJul 5, 23:40 UTC3h 25m
2026-07-05 ETH685 PVG → ADD Jul 5, 03:20 UTCJul 5, 23:40 UTC20h 20m
2026-07-05 ETH685 PVG → ADD Jul 5, 01:20 UTCJul 5, 23:40 UTC22h 20m
2026-07-05 ETH684 - Jul 5, 00:55 UTCJul 5, 23:15 UTC22h 20m
2026-07-03 ETH452 - Jul 3, 22:25 UTCJul 3, 22:45 UTC20m
2026-07-02 ETH739 - Jul 2, 19:55 UTCJul 2, 22:20 UTC2h 25m
2026-07-02 ETH739 LYS → GVA Jul 2, 18:15 UTCJul 2, 18:30 UTC15m
2026-07-02 ETH738 GVA → LYS Jul 2, 05:40 UTCJul 2, 06:15 UTC35m
2026-07-02 ETH738 - Jul 2, 01:15 UTCJul 2, 04:20 UTC3h 5m
2026-06-30 ETH501 IAD → ADD Jun 30, 15:10 UTCJul 1, 01:15 UTC10h 5m
2026-06-30 ETH500 - Jun 30, 03:45 UTCJun 30, 12:50 UTC9h 5m
2026-06-29 ETH500 - Jun 29, 09:20 UTCJun 30, 02:10 UTC16h 50m
2026-06-28 ETH751 BRU → ADD Jun 28, 21:20 UTCJun 29, 15:34 UTC18h 15m
2026-06-28 ETH751 BRU → ADD Jun 28, 20:19 UTCJun 29, 15:34 UTC19h 15m
2026-06-28 ETH750 - Jun 28, 01:44 UTCJun 28, 04:44 UTC3h 0m
2026-06-26 ETH808 - Jun 26, 13:30 UTCJun 26, 13:55 UTC25m
2026-06-25 ETH707 FRA → ADD Jun 25, 20:30 UTCJun 26, 11:40 UTC15h 10m
2026-06-25 ETH706 - Jun 25, 00:19 UTCJun 25, 03:59 UTC3h 40m
2026-06-22 ETH604 - Jun 22, 08:00 UTCJun 22, 08:25 UTC25m
2026-06-20 ETH707 FRA → ADD Jun 20, 20:20 UTCJun 20, 23:50 UTC3h 30m
2026-06-20 ETH706 - Jun 20, 00:14 UTCJun 20, 03:54 UTC3h 40m
2026-06-17 ETH735 CDG → ADD Jun 17, 20:20 UTCJun 17, 23:40 UTC3h 20m
2026-06-16 ETH734 - Jun 16, 14:05 UTCJun 17, 04:10 UTC14h 6m
2026-06-16 ETH955 - Jun 16, 11:40 UTCJun 16, 12:00 UTC20m
2026-06-15 ETH735 CDG → ADD Jun 15, 20:10 UTCJun 16, 10:15 UTC14h 5m
2026-06-15 ETH734 - Jun 15, 01:10 UTCJun 15, 04:34 UTC3h 25m
2026-06-13 ETH735 CDG → ADD Jun 13, 20:00 UTCJun 13, 22:45 UTC2h 45m
2026-06-13 ETH734 - Jun 13, 01:10 UTCJun 13, 04:30 UTC3h 19m
2026-06-10 ETH604 ADD → PEK Jun 10, 08:00 UTCJun 10, 08:20 UTC20m
2026-06-08 ETH808 JNB → ADD Jun 8, 12:55 UTCJun 8, 13:25 UTC30m
2026-06-07 ETH707 FRA → ADD Jun 7, 20:25 UTCJun 8, 11:15 UTC14h 50m
2026-06-07 ETH706 ADD → FRA Jun 7, 00:30 UTCJun 7, 04:00 UTC3h 30m
2026-06-05 ETH685 PVG → ADD Jun 5, 20:25 UTCJun 5, 23:20 UTC2h 55m
2026-06-05 ETH685 PVG → ADD Jun 5, 03:20 UTCJun 5, 23:20 UTC20h 0m

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

Mode-S 04021D frequently asked

What is Mode-S code 04021D?
04021D is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AZN.
Where is Mode-S 04021D registered?
Mode-S code 04021D is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 04021D broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 04021D, octal 01001035, decimal 262,685.
What flights does 04021D operate?
Mode-S 04021D has broadcast 20 distinct callsigns, including ETH685, ETH684, ETH706, ETH712, ETH707.