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sensors Mode-S transponder

040123

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-ATG · BOEING 787-8 Dreamliner

Hex
040123
Octal
01000443
Decimal
262,435
Country
ET
Tail
ET-ATG
Type
B788
Broadcasting now · callsign ETH737 · 39,000 ft
Flights observed
185
Distinct callsigns
20
Country
ET
Last broadcast
1h ago

Current position

040123 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 040123 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
ETH715 - 29 2026-07-11
ETH714 - 24 2026-07-11
ETH718 - 10 2026-07-13
ETH514 - 10 2026-07-09
ETH725 - 9 2026-06-15
ETH515 - 9 2026-07-10
ETH741 Ethiopian Airlines 8 2026-06-25
ETH737 - 8 2026-07-14
ETH724 - 8 2026-06-15
ETH736 - 7 2026-07-14
ETH516 - 7 2026-06-20
ETH740 - 6 2026-06-25
ETH719 - 6 2026-07-13
ETH731 Ethiopian Airlines 5 2026-06-28
ETH730 - 5 2026-06-28
ETH712 Ethiopian Airlines 4 2026-05-21
ETH628 - 4 2026-07-04
ETH909 Ethiopian Airlines 3 2026-05-07
ETH713 Ethiopian Airlines 3 2026-05-22
ETH517 - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ETH737 - Jul 14, 21:45 UTCJul 14, 22:45 UTC59m
2026-07-14 ETH737 ZRH → MXP Jul 14, 19:10 UTCJul 14, 19:45 UTC35m
2026-07-14 ETH736 MXP → ZRH Jul 14, 05:30 UTCJul 14, 06:00 UTC30m
2026-07-13 ETH719 LGW → MXP Jul 13, 10:40 UTCJul 14, 04:05 UTC17h 25m
2026-07-13 ETH718 - Jul 13, 00:45 UTCJul 13, 05:10 UTC4h 25m
2026-07-11 ETH715 - Jul 11, 20:35 UTCJul 12, 00:40 UTC4h 5m
2026-07-11 ETH715 OSL → ARN Jul 11, 18:15 UTCJul 11, 19:00 UTC45m
2026-07-11 ETH714 ARN → OSL Jul 11, 06:05 UTCJul 11, 06:45 UTC40m
2026-07-11 ETH714 - Jul 11, 04:20 UTCJul 11, 04:45 UTC25m
2026-07-11 ETH714 - Jul 11, 01:00 UTCJul 11, 03:20 UTC2h 20m
2026-07-10 ETH515 - Jul 10, 08:40 UTCJul 11, 00:55 UTC16h 15m
2026-07-10 ETH515 - Jul 10, 02:50 UTCJul 11, 00:55 UTC22h 5m
2026-07-10 ETH515 - Jul 10, 02:10 UTCJul 10, 14:55 UTC12h 45m
2026-07-09 ETH514 - Jul 9, 15:05 UTCJul 9, 23:20 UTC8h 15m
2026-07-09 ETH514 - Jul 9, 00:10 UTCJul 9, 22:45 UTC22h 35m
2026-07-08 ETH715 - Jul 8, 20:15 UTCJul 8, 23:30 UTC3h 15m
2026-07-08 ETH715 OSL → ARN Jul 8, 18:00 UTCJul 8, 18:40 UTC40m
2026-07-08 ETH714 ARN → OSL Jul 8, 05:55 UTCJul 8, 06:40 UTC45m
2026-07-07 ETH719 LGW → ARN Jul 7, 09:40 UTCJul 8, 04:30 UTC18h 50m
2026-07-06 ETH718 - Jul 6, 11:05 UTCJul 7, 05:50 UTC18h 45m
2026-07-06 ETH718 - Jul 6, 04:50 UTCJul 7, 04:45 UTC23h 55m
2026-07-06 ETH515 - Jul 6, 04:40 UTCJul 7, 02:45 UTC22h 5m
2026-07-05 ETH514 LFW → JFK Jul 5, 14:45 UTCJul 5, 23:20 UTC8h 35m
2026-07-04 ETH514 LFW → JFK Jul 4, 21:30 UTCJul 5, 15:50 UTC18h 20m
2026-07-04 ETH629 BKK → ADD Jul 4, 18:55 UTCJul 4, 19:10 UTC15m
2026-07-04 ETH629 BKK → ADD Jul 4, 13:50 UTCJul 4, 16:40 UTC2h 50m
2026-07-04 ETH628 - Jul 4, 10:00 UTCJul 4, 10:20 UTC20m
2026-07-04 ETH628 - Jul 4, 07:20 UTCJul 4, 09:25 UTC2h 5m
2026-07-03 ETH628 - Jul 3, 15:40 UTCJul 4, 05:50 UTC14h 10m
2026-07-03 ETH628 - Jul 3, 09:40 UTCJul 4, 05:50 UTC20h 10m
2026-07-03 ETH515 - Jul 3, 03:15 UTCJul 4, 02:05 UTC22h 50m
2026-07-02 ETH514 LFW → JFK Jul 2, 15:00 UTCJul 2, 23:20 UTC8h 20m
2026-07-01 ETH715 - Jul 1, 22:50 UTCJul 2, 22:45 UTC23h 55m
2026-07-01 ETH715 - Jul 1, 20:50 UTCJul 2, 15:55 UTC19h 5m
2026-07-01 ETH715 - Jul 1, 20:25 UTCJul 2, 15:55 UTC19h 30m
2026-07-01 ETH715 OSL → ARN Jul 1, 18:05 UTCJul 1, 18:45 UTC40m
2026-07-01 ETH714 ARN → OSL Jul 1, 05:55 UTCJul 1, 06:40 UTC45m
2026-06-30 ETH714 - Jun 30, 23:55 UTCJul 1, 04:05 UTC4h 10m
2026-06-28 ETH731 DUB → ADD Jun 28, 20:45 UTCJun 28, 23:29 UTC2h 45m
2026-06-28 ETH731 DUB → ADD Jun 28, 18:14 UTCJun 28, 19:04 UTC50m
2026-06-28 ETH730 VIE → WAW Jun 28, 05:04 UTCJun 28, 06:05 UTC1h 0m
2026-06-28 ETH730 - Jun 28, 01:10 UTCJun 28, 03:50 UTC2h 40m
2026-06-27 ETH730 - Jun 27, 04:49 UTCJun 28, 03:50 UTC23h 0m
2026-06-27 ETH689 - Jun 27, 04:24 UTCJun 28, 02:44 UTC22h 20m
2026-06-26 ETH686 - Jun 26, 23:34 UTCJun 27, 02:20 UTC2h 45m
2026-06-25 ETH741 MAD → ADD Jun 25, 21:40 UTCJun 26, 00:35 UTC2h 55m
2026-06-25 ETH741 MAD → ADD Jun 25, 18:55 UTCJun 25, 19:39 UTC45m
2026-06-25 ETH740 - Jun 25, 05:20 UTCJun 25, 06:09 UTC50m
2026-06-24 ETH740 CPT → MAD Jun 24, 12:04 UTCJun 25, 03:40 UTC15h 35m
2026-06-24 ETH845 - Jun 24, 10:04 UTCJun 24, 10:39 UTC35m

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

Mode-S 040123 frequently asked

What is Mode-S code 040123?
040123 is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-ATG.
Where is Mode-S 040123 registered?
Mode-S code 040123 is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 040123 broadcasting right now?
Yes. Mode-S 040123 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 040123, octal 01000443, decimal 262,435.
What flights does 040123 operate?
Mode-S 040123 has broadcast 20 distinct callsigns, including ETH715, ETH714, ETH718, ETH514, ETH725.