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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
Broadcasting now · callsign ETH500 · 23,900 ft
Flights observed
81
Distinct callsigns
20
Country
ET
Last broadcast
1h ago

Current position

04021D is currently broadcasting. Map zoomed to live position.

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 Ethiopian Airlines 12 2026-06-01
ETH712 Ethiopian Airlines 7 2026-05-26
ETH713 Ethiopian Airlines 6 2026-05-26
ETH506 Ethiopian Airlines 6 2026-04-23
ETH507 Ethiopian Airlines 5 2026-04-24
ETH553 Ethiopian Airlines 4 2026-05-05
ETH726 Ethiopian Airlines 3 2026-05-07
ETH706 Ethiopian Airlines 3 2026-05-24
ETH684 Ethiopian Airlines 3 2026-05-30
ETH673 Ethiopian Airlines 3 2026-04-16
ETH672 Ethiopian Airlines 3 2026-04-16
ETH955 Ethiopian Airlines 2 2026-05-12
ETH846 Ethiopian Airlines 2 2026-05-14
ETH751 Ethiopian Airlines 2 2026-05-02
ETH750 Ethiopian Airlines 2 2026-05-01
ETH729 Ethiopian Airlines 2 2026-05-13
ETH728 Ethiopian Airlines 2 2026-05-13
ETH727 Ethiopian Airlines 2 2026-05-07
ETH707 Ethiopian Airlines 2 2026-05-24
ETH701 Ethiopian Airlines 2 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 ETH500 DUB → IAD Jun 3, 00:00 UTCJun 3, 02:00 UTC2h 0m
2026-06-01 ETH685 PVG → ADD Jun 1, 20:00 UTCJun 1, 23:20 UTC3h 20m
2026-06-01 ETH685 PVG → ADD Jun 1, 03:20 UTCJun 1, 23:20 UTC20h 0m
2026-06-01 ETH685 PVG → ADD Jun 1, 01:20 UTCJun 1, 23:20 UTC22h 0m
2026-06-01 ETH685 PVG → ADD Jun 1, 00:55 UTCJun 1, 23:15 UTC22h 20m
2026-05-30 ETH685 PVG → ADD May 30, 20:15 UTCMay 30, 23:30 UTC3h 15m
2026-05-30 ETH685 PVG → ADD May 30, 03:20 UTCMay 30, 23:30 UTC20h 10m
2026-05-30 ETH685 PVG → ADD May 30, 01:20 UTCMay 30, 23:30 UTC22h 10m
2026-05-30 ETH684 ADD → PVG May 30, 01:05 UTCMay 30, 23:15 UTC22h 10m
2026-05-29 ETH684 ADD → PVG May 29, 08:45 UTCMay 30, 04:10 UTC19h 25m
2026-05-28 ETH605 PEK → ADD May 28, 16:25 UTCMay 29, 08:45 UTC16h 20m
2026-05-28 ETH604 ADD → PEK May 28, 07:35 UTCMay 28, 08:00 UTC25m
2026-05-26 ETH713 FCO → ADD May 26, 21:20 UTCMay 26, 23:14 UTC1h 55m
2026-05-26 ETH712 ADD → FCO May 26, 01:34 UTCMay 26, 03:19 UTC1h 45m
2026-05-24 ETH707 FRA → ADD May 24, 20:35 UTCMay 24, 23:10 UTC2h 35m
2026-05-24 ETH706 ADD → FRA May 24, 00:40 UTCMay 24, 04:10 UTC3h 30m
2026-05-19 ETH685 PVG → ADD May 19, 20:50 UTCMay 20, 09:20 UTC12h 31m
2026-05-19 ETH685 PVG → ADD May 19, 03:20 UTCMay 19, 23:55 UTC20h 35m
2026-05-19 ETH685 PVG → ADD May 19, 01:20 UTCMay 19, 23:55 UTC22h 35m
2026-05-19 ETH684 ADD → PVG May 19, 00:45 UTCMay 19, 21:40 UTC20h 55m
2026-05-17 ETH707 FRA → ADD May 17, 20:15 UTCMay 17, 22:55 UTC2h 40m
2026-05-17 ETH706 ADD → FRA May 17, 04:40 UTCMay 17, 05:10 UTC30m
2026-05-17 ETH706 ADD → FRA May 17, 00:45 UTCMay 17, 04:25 UTC3h 40m
2026-05-14 ETH846 CPT → ADD May 14, 14:15 UTCMay 14, 14:40 UTC25m
2026-05-14 ETH846 CPT → ADD May 14, 12:55 UTCMay 14, 13:15 UTC20m
2026-05-13 ETH729 MAN → BRU May 13, 20:40 UTCMay 14, 11:40 UTC15h 0m
2026-05-13 ETH729 MAN → BRU May 13, 17:50 UTCMay 13, 19:15 UTC1h 25m
2026-05-13 ETH728 GVA → MAN May 13, 05:40 UTCMay 13, 07:15 UTC1h 35m
2026-05-12 ETH728 GVA → MAN May 12, 14:15 UTCMay 13, 04:20 UTC14h 5m
2026-05-12 ETH955 ADD → NSI May 12, 11:55 UTCMay 12, 12:15 UTC20m
2026-05-12 ETH955 ADD → NSI May 12, 10:15 UTCMay 12, 10:35 UTC20m
2026-05-11 ETH713 FCO → ADD May 11, 22:05 UTCMay 11, 22:35 UTC29m
2026-05-11 ETH713 FCO → ADD May 11, 18:50 UTCMay 11, 20:25 UTC1h 35m
2026-05-11 ETH712 ADD → FCO May 11, 05:35 UTCMay 11, 07:20 UTC1h 45m
2026-05-11 ETH712 ADD → FCO May 11, 01:10 UTCMay 11, 04:00 UTC2h 50m
2026-05-09 ETH604 ADD → PEK May 9, 08:15 UTCMay 9, 08:30 UTC15m
2026-05-07 ETH727 FCO → ADD May 7, 21:20 UTCMay 7, 23:29 UTC2h 9m
2026-05-07 ETH727 FCO → ADD May 7, 17:55 UTCMay 7, 19:35 UTC1h 40m
2026-05-07 ETH726 MRS → MAN May 7, 07:05 UTCMay 7, 08:45 UTC1h 40m
2026-05-06 ETH726 MRS → MAN May 6, 15:30 UTCMay 7, 05:30 UTC13h 59m
2026-05-06 ETH726 MRS → MAN May 6, 09:20 UTCMay 7, 05:30 UTC20h 9m
2026-05-05 ETH553 YYZ → ADD May 5, 21:20 UTCMay 6, 15:35 UTC18h 15m
2026-05-05 ETH553 YYZ → ADD May 5, 20:35 UTCMay 6, 15:35 UTC19h 0m
2026-05-05 ETH553 YYZ → ADD May 5, 15:20 UTCMay 6, 09:20 UTC18h 0m
2026-05-05 ETH553 YYZ → ADD May 5, 15:10 UTCMay 6, 09:20 UTC18h 10m
2026-05-05 ETH552 ADD → DUB May 5, 04:35 UTCMay 5, 13:05 UTC8h 30m
2026-05-04 ETH552 ADD → DUB May 4, 13:00 UTCMay 5, 02:35 UTC13h 36m
2026-05-04 ETH809 ADD → JNB May 4, 07:55 UTCMay 4, 11:30 UTC3h 35m
2026-05-02 ETH751 BRU → ADD May 2, 19:50 UTCMay 2, 22:35 UTC2h 45m
2026-05-01 ETH750 ADD → BRU May 1, 13:00 UTCMay 2, 05:00 UTC16h 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?
Yes. Mode-S 04021D is currently airborne.
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, ETH712, ETH713, ETH506, ETH507.