sensors Mode-S transponder

04019A

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-AYD · BOEING 787-9 Dreamliner

Hex
04019A
Octal
01000632
Decimal
262,554
Country
ET
Tail
ET-AYD
Type
B789
Broadcasting now · callsign ETH740 · 18,150 ft
Flights observed
190
Distinct callsigns
20
Country
ET
Last broadcast
1h ago

Current position

04019A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 04019A 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
ETH552 - 23 2026-07-10
ETH553 - 17 2026-07-10
ETH629 Ethiopian Airlines 11 2026-05-19
ETH628 Ethiopian Airlines 11 2026-05-19
ETH740 - 9 2026-07-13
ETH741 Ethiopian Airlines 8 2026-06-18
ETH645 Ethiopian Airlines 8 2026-06-14
ETH725 - 7 2026-06-29
ETH724 - 7 2026-06-29
ETH737 Ethiopian Airlines 6 2026-05-31
ETH644 - 5 2026-06-14
ETH736 Ethiopian Airlines 4 2026-05-22
ETH731 Ethiopian Airlines 4 2026-07-05
ETH712 Ethiopian Airlines 4 2026-05-13
ETH639 Ethiopian Airlines 4 2026-04-23
ETH638 Ethiopian Airlines 4 2026-04-23
ETH512 - 4 2026-07-11
ETH925 Ethiopian Airlines 3 2026-05-18
ETH845 Ethiopian Airlines 3 2026-05-20
ETH719 - 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ETH740 - Jul 13, 08:25 UTCJul 14, 02:15 UTC17h 50m
2026-07-13 ETH907 - Jul 13, 05:20 UTCJul 13, 05:55 UTC35m
2026-07-12 ETH513 - Jul 12, 09:25 UTCJul 13, 05:55 UTC20h 30m
2026-07-12 ETH513 - Jul 12, 03:05 UTCJul 12, 10:20 UTC7h 15m
2026-07-11 ETH512 - Jul 11, 15:20 UTCJul 11, 23:05 UTC7h 45m
2026-07-11 ETH512 - Jul 11, 00:35 UTCJul 11, 23:05 UTC22h 30m
2026-07-10 ETH553 - Jul 10, 22:35 UTCJul 11, 22:30 UTC23h 55m
2026-07-10 ETH553 - Jul 10, 20:35 UTCJul 11, 16:10 UTC19h 35m
2026-07-10 ETH553 - Jul 10, 20:00 UTCJul 11, 16:10 UTC20h 10m
2026-07-10 ETH553 - Jul 10, 15:05 UTCJul 11, 01:05 UTC10h 0m
2026-07-10 ETH552 FCO → YYZ Jul 10, 03:50 UTCJul 10, 12:30 UTC8h 40m
2026-07-09 ETH552 - Jul 9, 23:10 UTCJul 10, 01:55 UTC2h 45m
2026-07-08 ETH729 - Jul 8, 20:40 UTCJul 8, 23:00 UTC2h 20m
2026-07-08 ETH729 MAN → GVA Jul 8, 17:55 UTCJul 8, 19:25 UTC1h 30m
2026-07-08 ETH728 GVA → MAN Jul 8, 06:05 UTCJul 8, 07:30 UTC1h 25m
2026-07-07 ETH728 - Jul 7, 09:10 UTCJul 8, 04:10 UTC19h 0m
2026-07-07 ETH513 - Jul 7, 02:55 UTCJul 7, 03:35 UTC40m
2026-07-06 ETH512 - Jul 6, 15:40 UTCJul 6, 23:35 UTC7h 55m
2026-07-05 ETH512 - Jul 5, 22:40 UTCJul 6, 16:35 UTC17h 55m
2026-07-05 ETH731 DUB → ADD Jul 5, 20:35 UTCJul 6, 16:35 UTC20h 0m
2026-07-05 ETH731 DUB → ADD Jul 5, 20:25 UTCJul 6, 16:35 UTC20h 10m
2026-07-05 ETH731 DUB → ADD Jul 5, 17:50 UTCJul 5, 18:45 UTC55m
2026-07-05 ETH730 VIE → WAW Jul 5, 05:10 UTCJul 5, 06:05 UTC55m
2026-07-04 ETH730 - Jul 4, 14:05 UTCJul 5, 03:45 UTC13h 40m
2026-07-03 ETH519 - Jul 3, 16:35 UTCJul 4, 10:35 UTC18h 0m
2026-07-03 ETH519 - Jul 3, 15:15 UTCJul 4, 10:35 UTC19h 20m
2026-07-03 ETH518 - Jul 3, 03:00 UTCJul 3, 12:30 UTC9h 30m
2026-07-02 ETH518 - Jul 2, 23:30 UTCJul 3, 01:20 UTC1h 50m
2026-07-01 ETH553 YYZ → ADD Jul 1, 15:05 UTCJul 2, 00:30 UTC9h 25m
2026-07-01 ETH552 - Jul 1, 03:35 UTCJul 1, 12:25 UTC8h 50m
2026-06-30 ETH552 - Jun 30, 23:10 UTCJul 1, 01:45 UTC2h 35m
2026-06-29 ETH725 - Jun 29, 20:24 UTCJun 29, 23:05 UTC2h 40m
2026-06-29 ETH725 - Jun 29, 17:45 UTCJun 29, 19:05 UTC1h 20m
2026-06-29 ETH724 VIE → CPH Jun 29, 05:15 UTCJun 29, 06:29 UTC1h 15m
2026-06-28 ETH724 - Jun 28, 13:49 UTCJun 29, 03:49 UTC14h 0m
2026-06-27 ETH725 - Jun 27, 20:19 UTCJun 28, 14:14 UTC17h 55m
2026-06-27 ETH725 CPH → VIE Jun 27, 17:39 UTCJun 27, 18:49 UTC1h 10m
2026-06-27 ETH724 VIE → CPH Jun 27, 05:15 UTCJun 27, 06:35 UTC1h 20m
2026-06-26 ETH724 CPT → VIE Jun 26, 13:45 UTCJun 27, 03:40 UTC13h 55m
2026-06-25 ETH553 YYZ → ADD Jun 25, 16:35 UTCJun 26, 12:10 UTC19h 35m
2026-06-25 ETH553 YYZ → ADD Jun 25, 15:15 UTCJun 26, 12:10 UTC20h 55m
2026-06-25 ETH552 - Jun 25, 03:34 UTCJun 25, 12:19 UTC8h 45m
2026-06-24 ETH552 - Jun 24, 23:10 UTCJun 25, 01:50 UTC2h 40m
2026-06-23 ETH906 DSS → BKO Jun 23, 19:10 UTCJun 23, 19:39 UTC30m
2026-06-23 ETH909 - Jun 23, 16:24 UTCJun 23, 17:04 UTC40m
2026-06-22 ETH687 DEL → ADD Jun 22, 21:30 UTCJun 23, 17:04 UTC19h 35m
2026-06-22 ETH688 - Jun 22, 06:05 UTCJun 22, 19:49 UTC13h 45m
2026-06-21 ETH610 CPT → BOM Jun 21, 13:44 UTCJun 22, 03:19 UTC13h 35m
2026-06-20 ETH553 YYZ → ADD Jun 20, 16:34 UTCJun 21, 12:35 UTC20h 0m
2026-06-20 ETH553 YYZ → ADD Jun 20, 15:04 UTCJun 21, 12:24 UTC21h 20m

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

Mode-S 04019A frequently asked

What is Mode-S code 04019A?
04019A is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-AYD.
Where is Mode-S 04019A registered?
Mode-S code 04019A is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 04019A broadcasting right now?
Yes. Mode-S 04019A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 04019A, octal 01000632, decimal 262,554.
What flights does 04019A operate?
Mode-S 04019A has broadcast 20 distinct callsigns, including ETH552, ETH553, ETH629, ETH628, ETH740.