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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 Jul 26, 14:50 UTC
Flights observed
155
Distinct callsigns
20
Country
ET
Last broadcast
Jul 26, 14:50 UTC

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 - 21 2026-07-19
ETH684 Ethiopian Airlines 12 2026-07-19
ETH706 Ethiopian Airlines 9 2026-07-21
ETH707 - 8 2026-07-21
ETH500 Ethiopian Airlines 8 2026-07-23
ETH712 Ethiopian Airlines 7 2026-05-26
ETH713 Ethiopian Airlines 6 2026-05-26
ETH506 Ethiopian Airlines 6 2026-04-23
ETH501 Ethiopian Airlines 6 2026-07-23
ETH751 - 5 2026-07-13
ETH507 Ethiopian Airlines 5 2026-04-24
ETH750 - 4 2026-07-13
ETH645 Ethiopian Airlines 4 2026-07-25
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ETH603 DXB → ADD Jul 26, 14:20 UTCJul 26, 14:50 UTC30m
2026-07-25 ETH645 HKG → ADD Jul 25, 19:50 UTCJul 26, 12:35 UTC16h 46m
2026-07-25 ETH645 HKG → ADD Jul 25, 18:10 UTCJul 25, 18:15 UTC5m
2026-07-25 ETH645 HKG → ADD Jul 25, 16:15 UTCJul 25, 16:35 UTC20m
2026-07-25 ETH645 HKG → ADD Jul 25, 14:45 UTCJul 25, 15:15 UTC30m
2026-07-25 ETH644 HKG → MNL Jul 25, 10:35 UTCJul 25, 12:20 UTC1h 45m
2026-07-25 ETH644 HKG → MNL Jul 25, 06:50 UTCJul 25, 07:20 UTC30m
2026-07-25 ETH644 HKG → MNL Jul 25, 01:30 UTCJul 25, 05:10 UTC3h 40m
2026-07-23 ETH501 IAD → ADD Jul 23, 15:45 UTCJul 24, 01:10 UTC9h 25m
2026-07-23 ETH500 DUB → IAD Jul 23, 04:05 UTCJul 23, 12:55 UTC8h 50m
2026-07-23 ETH500 DUB → IAD Jul 23, 00:35 UTCJul 23, 02:35 UTC2h 0m
2026-07-21 ETH707 - Jul 21, 20:50 UTCJul 22, 00:10 UTC3h 20m
2026-07-21 ETH706 ADD → FRA Jul 21, 01:00 UTCJul 21, 03:55 UTC2h 55m
2026-07-19 ETH685 - Jul 19, 20:20 UTCJul 19, 23:40 UTC3h 20m
2026-07-19 ETH685 - Jul 19, 03:20 UTCJul 19, 23:40 UTC20h 20m
2026-07-19 ETH684 ADD → PVG Jul 19, 01:20 UTCJul 19, 23:40 UTC22h 20m
2026-07-19 ETH684 ADD → PVG Jul 19, 01:00 UTCJul 19, 23:15 UTC22h 15m
2026-07-18 ETH684 ADD → PVG Jul 18, 13:45 UTCJul 19, 04:55 UTC15h 10m
2026-07-17 ETH501 - Jul 17, 20:50 UTCJul 18, 11:50 UTC15h 1m
2026-07-17 ETH501 - Jul 17, 15:20 UTCJul 18, 11:50 UTC20h 31m
2026-07-17 ETH501 IAD → JNB Jul 17, 15:10 UTCJul 18, 11:50 UTC20h 41m
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

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 Jul 26, 14:50 UTC.
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, ETH707, ETH500.