Apparatus

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sensors Mode-S transponder

04023A

ICAO 24-bit transponder address · allocated to Ethiopia

Currently assigned to ET-BAQ · BOEING 737 MAX 8

Hex
04023A
Octal
01001072
Decimal
262,714
Country
ET
Tail
ET-BAQ
Type
B38M
No current signal · last broadcast Jul 26, 09:15 UTC
Flights observed
127
Distinct callsigns
15
Country
ET
Last broadcast
Jul 26, 09:15 UTC

Last known position

Most recent position reported by Mode-S 04023A.

Country allocation

The ICAO 24-bit address 04023A 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 15 distinct

Callsign Airline Flights Last seen
SKK055 Skylink Aviation 31 2026-07-26
SKK052 Skylink Aviation 25 2026-07-24
SKK054 - 23 2026-07-18
SKK053 Skylink Aviation 22 2026-07-25
SKK064 - 4 2026-06-05
SKK022 - 4 2026-07-06
SKK051 - 3 2026-07-12
SKK050 - 3 2026-07-11
SKK023 - 3 2026-07-03
SKK078 - 2 2026-04-17
SKK065 Skylink Aviation 2 2026-05-30
SKK015 - 2 2026-07-09
SKK423 - 1 2026-07-05
SKK014 - 1 2026-07-09
SK055 - 1 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKK055 RAI → DSS Jul 26, 08:45 UTCJul 26, 09:15 UTC30m
2026-07-25 SKK055 RAI → DSS Jul 25, 17:20 UTCJul 26, 07:20 UTC14h 1m
2026-07-25 SKK053 OXB → DSS Jul 25, 08:35 UTCJul 25, 16:05 UTC7h 30m
2026-07-25 SKK053 OXB → DSS Jul 25, 06:50 UTCJul 25, 07:20 UTC30m
2026-07-24 SKK052 LFW → DSS Jul 24, 17:20 UTCJul 24, 17:45 UTC25m
2026-07-24 SKK052 LFW → DSS Jul 24, 15:30 UTCJul 24, 16:10 UTC40m
2026-07-23 SKK053 OXB → DSS Jul 23, 08:45 UTCJul 23, 09:20 UTC35m
2026-07-23 SKK053 OXB → DSS Jul 23, 07:00 UTCJul 23, 07:25 UTC25m
2026-07-22 SKK052 LFW → DSS Jul 22, 17:05 UTCJul 22, 17:30 UTC25m
2026-07-22 SKK052 LFW → DSS Jul 22, 15:15 UTCJul 22, 15:50 UTC35m
2026-07-21 SKK053 OXB → DSS Jul 21, 08:20 UTCJul 21, 08:55 UTC35m
2026-07-21 SKK053 OXB → DSS Jul 21, 06:50 UTCJul 21, 07:25 UTC35m
2026-07-20 SKK052 LFW → DSS Jul 20, 17:40 UTCJul 20, 18:10 UTC30m
2026-07-20 SKK055 RAI → DSS Jul 20, 08:45 UTCJul 20, 16:25 UTC7h 40m
2026-07-19 SKK055 RAI → DSS Jul 19, 17:30 UTCJul 20, 07:25 UTC13h 55m
2026-07-19 SKK055 RAI → DSS Jul 19, 08:35 UTCJul 19, 16:10 UTC7h 35m
2026-07-18 SKK055 RAI → DSS Jul 18, 17:35 UTCJul 19, 07:20 UTC13h 45m
2026-07-18 SKK054 - Jul 18, 08:20 UTCJul 18, 15:55 UTC7h 35m
2026-07-18 SKK053 - Jul 18, 06:45 UTCJul 18, 07:15 UTC30m
2026-07-17 SKK052 LFW → DSS Jul 17, 17:20 UTCJul 17, 17:44 UTC25m
2026-07-17 SKK052 LFW → DSS Jul 17, 15:35 UTCJul 17, 16:10 UTC35m
2026-07-12 SKK051 - Jul 12, 09:30 UTCJul 12, 10:05 UTC35m
2026-07-11 SKK050 - Jul 11, 16:10 UTCJul 11, 16:45 UTC35m
2026-07-09 SKK015 - Jul 9, 16:55 UTCJul 10, 07:50 UTC14h 55m
2026-07-09 SKK015 - Jul 9, 08:35 UTCJul 10, 07:50 UTC23h 15m
2026-07-09 SKK014 - Jul 9, 08:15 UTCJul 9, 17:35 UTC9h 20m
2026-07-09 SKK053 - Jul 9, 06:40 UTCJul 9, 07:00 UTC20m
2026-07-08 SKK052 - Jul 8, 17:15 UTCJul 8, 17:40 UTC25m
2026-07-08 SKK052 - Jul 8, 15:15 UTCJul 8, 15:50 UTC35m
2026-07-06 SKK022 - Jul 6, 17:55 UTCJul 6, 18:10 UTC15m
2026-07-05 SKK423 - Jul 5, 06:35 UTCJul 5, 06:45 UTC10m
2026-07-04 SKK022 - Jul 4, 18:55 UTCJul 4, 19:05 UTC10m
2026-07-03 SKK023 - Jul 3, 06:50 UTCJul 3, 07:15 UTC25m
2026-07-02 SKK022 - Jul 2, 18:20 UTCJul 2, 18:45 UTC25m
2026-06-30 SKK053 - Jun 30, 09:25 UTCJun 30, 10:00 UTC35m
2026-06-30 SKK053 - Jun 30, 07:45 UTCJun 30, 08:15 UTC30m
2026-06-29 SKK052 - Jun 29, 17:55 UTCJun 29, 18:19 UTC25m
2026-06-29 SKK052 - Jun 29, 16:10 UTCJun 29, 16:50 UTC40m
2026-06-28 SKK055 - Jun 28, 08:44 UTCJun 28, 09:20 UTC35m
2026-06-27 SKK055 - Jun 27, 17:20 UTCJun 28, 07:25 UTC14h 5m
2026-06-27 SKK054 - Jun 27, 15:24 UTCJun 27, 16:00 UTC35m
2026-06-26 SKK055 - Jun 26, 08:40 UTCJun 26, 09:14 UTC35m
2026-06-26 SKK055 - Jun 26, 06:39 UTCJun 26, 07:20 UTC40m
2026-06-25 SKK054 - Jun 25, 17:39 UTCJun 25, 18:10 UTC30m
2026-06-25 SKK054 - Jun 25, 15:24 UTCJun 25, 15:59 UTC35m
2026-06-12 SK055 - Jun 12, 08:45 UTCJun 12, 09:15 UTC30m
2026-06-12 SKK055 RAI → DSS Jun 12, 06:20 UTCJun 12, 07:25 UTC1h 5m
2026-06-11 SKK054 - Jun 11, 17:50 UTCJun 11, 18:45 UTC55m
2026-06-11 SKK054 - Jun 11, 15:30 UTCJun 11, 16:00 UTC30m
2026-06-09 SKK053 OXB → DSS Jun 9, 10:00 UTCJun 9, 10:35 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-BAQ page for operator, model, and routing details .

Mode-S 04023A frequently asked

What is Mode-S code 04023A?
04023A is an ICAO 24-bit transponder address. Allocated to Ethiopia. Assigned to ET-BAQ.
Where is Mode-S 04023A registered?
Mode-S code 04023A is allocated to Ethiopia (ET). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 04023A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 09:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 04023A, octal 01001072, decimal 262,714.
What flights does 04023A operate?
Mode-S 04023A has broadcast 15 distinct callsigns, including SKK055, SKK052, SKK054, SKK053, SKK064.