Apparatus

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sensors Mode-S transponder

4BCDAB

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-SMK · BOEING 737 MAX 8

Hex
4BCDAB
Octal
22746653
Decimal
4,967,851
Country
TR
Tail
TC-SMK
Type
B38M
Transponder active on ground
Flights observed
221
Distinct callsigns
20
Country
TR
Last broadcast
11m ago

Last known position

Most recent position reported by Mode-S 4BCDAB.

Country allocation

The ICAO 24-bit address 4BCDAB falls within the block assigned to Turkey (TR) by ICAO Annex 10, Volume III. Every aircraft registered in Turkey 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
SXS9LQ SunExpress 8 2026-05-11
SXS6PC SunExpress 8 2026-05-24
SXS5NH SunExpress 8 2026-05-24
SXS7TL SunExpress 7 2026-05-24
SXS8JE SunExpress 6 2026-05-10
SXS93H - 5 2026-05-12
SXS8HN SunExpress 5 2026-05-11
SXS5ET SunExpress 5 2026-05-10
SXS7LK SunExpress 4 2026-05-28
SXS4DQ SunExpress 4 2026-05-24
SXS3FR SunExpress 4 2026-05-27
SXS2VN SunExpress 4 2026-04-30
SXS2KY SunExpress 4 2026-05-26
SXS1JM SunExpress 4 2026-04-30
SXS13X - 4 2026-05-10
SXS8XT SunExpress 3 2026-05-28
SXS8UH SunExpress 3 2026-05-26
SXS8NU - 3 2026-04-14
SXS8GR SunExpress 3 2026-04-16
SXS7XF SunExpress 3 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SXS57V - May 29, 20:05 UTCMay 30, 04:45 UTC8h 40m
2026-05-29 SXS1 AYT → FRA May 29, 14:30 UTCMay 29, 17:55 UTC3h 25m
2026-05-29 SXS5BV ADB → AYT May 29, 09:55 UTCMay 29, 13:05 UTC3h 10m
2026-05-29 SXS4QE AYT → BRE May 29, 04:45 UTCMay 29, 08:40 UTC3h 55m
2026-05-28 SXS8XT MAN → AYT May 28, 18:15 UTCMay 28, 22:15 UTC4h 0m
2026-05-28 SXS7LK AYT → MAN May 28, 11:55 UTCMay 28, 16:30 UTC4h 35m
2026-05-28 SXS3EL VAN → AYT May 28, 05:45 UTCMay 28, 10:00 UTC4h 15m
2026-05-28 SXS1PJ CGN → AYT May 28, 01:05 UTCMay 28, 04:10 UTC3h 5m
2026-05-27 SXS9NX - May 27, 20:20 UTCMay 27, 23:50 UTC3h 30m
2026-05-27 SXS16E BER → AYT May 27, 15:40 UTCMay 27, 18:35 UTC2h 55m
2026-05-27 SXS8TG AYT → BER May 27, 11:20 UTCMay 27, 14:30 UTC3h 10m
2026-05-27 SXS3FR BER → AYT May 27, 05:59 UTCMay 27, 09:00 UTC3h 0m
2026-05-27 SXS6PQ AYT → LGW May 27, 02:39 UTCMay 27, 04:24 UTC1h 45m
2026-05-26 SXS5UE BER → SZF May 26, 20:00 UTCMay 26, 21:59 UTC2h 0m
2026-05-26 SXS2KY AYT → BER May 26, 15:09 UTCMay 26, 18:14 UTC3h 5m
2026-05-26 SXS7UJ CGN → AYT May 26, 10:20 UTCMay 26, 13:29 UTC3h 10m
2026-05-26 SXS8UH AYT → ADB May 26, 05:40 UTCMay 26, 09:04 UTC3h 25m
2026-05-26 SXS7RL NCL → AYT May 26, 00:19 UTCMay 26, 01:40 UTC1h 20m
2026-05-25 SXS630 AYT → SKP May 25, 21:35 UTCMay 25, 22:55 UTC1h 20m
2026-05-25 SXS74P AYT → ZRH May 25, 17:05 UTCMay 25, 20:15 UTC3h 9m
2026-05-25 SXS6RU STR → ADA May 25, 12:35 UTCMay 25, 15:35 UTC3h 0m
2026-05-25 SXS4GL LEJ → AYT May 25, 08:20 UTCMay 25, 11:15 UTC2h 55m
2026-05-25 SXS9SR - May 25, 04:00 UTCMay 25, 07:00 UTC3h 0m
2026-05-24 SXS5NH HAM → AYT May 24, 18:00 UTCMay 24, 21:15 UTC3h 15m
2026-05-24 SXS6PC AYT → HAM May 24, 13:20 UTCMay 24, 16:45 UTC3h 25m
2026-05-24 SXS7TL ADB → AMS May 24, 08:25 UTCMay 24, 11:40 UTC3h 15m
2026-05-24 SXS4DQ DLM → DUS May 24, 03:35 UTCMay 24, 06:55 UTC3h 20m
2026-05-23 SXS4LY BHX → DLM May 23, 19:45 UTCMay 23, 23:35 UTC3h 50m
2026-05-23 SXS9EN MLX → DUS May 23, 14:25 UTCMay 23, 18:20 UTC3h 55m
2026-05-23 SXS6DN BHX → DLM May 23, 09:15 UTCMay 23, 12:50 UTC3h 35m
2026-05-23 SXS6MX DLM → BHX May 23, 03:30 UTCMay 23, 07:30 UTC4h 0m
2026-05-22 SXS6WB - May 22, 18:35 UTCMay 22, 22:35 UTC4h 0m
2026-05-22 SXS4QB - May 22, 12:55 UTCMay 22, 17:25 UTC4h 30m
2026-05-22 SXS6WA BER → DLM May 22, 08:50 UTCMay 22, 11:25 UTC2h 35m
2026-05-22 SXS6SJ DLM → BER May 22, 04:10 UTCMay 22, 07:05 UTC2h 55m
2026-05-21 SXS6TK ADB → MQM May 21, 20:20 UTCMay 21, 23:50 UTC3h 30m
2026-05-21 SXS7XF DLM → LGW May 21, 14:50 UTCMay 21, 18:35 UTC3h 45m
2026-05-21 SXS7GA DUS → DLM May 21, 10:10 UTCMay 21, 13:15 UTC3h 5m
2026-05-21 SXS4DQ DLM → DUS May 21, 05:25 UTCMay 21, 08:35 UTC3h 10m
2026-05-20 SXS6TK ADB → MQM May 20, 20:00 UTCMay 20, 23:25 UTC3h 25m
2026-05-20 SXS7XF DLM → LGW May 20, 14:45 UTCMay 20, 18:40 UTC3h 55m
2026-05-20 SXS6DN BHX → DLM May 20, 09:10 UTCMay 20, 12:45 UTC3h 35m
2026-05-20 SXS6MX DLM → BHX May 20, 03:35 UTCMay 20, 07:30 UTC3h 56m
2026-05-19 SXS7GA DUS → DLM May 19, 07:55 UTCMay 19, 10:45 UTC2h 50m
2026-05-19 SXS51C ZRH → AYT May 19, 02:40 UTCMay 19, 06:05 UTC3h 25m
2026-05-18 SXS8RQ BRS → AYT May 18, 18:05 UTCMay 18, 22:00 UTC3h 54m
2026-05-18 SXS4JV AYT → BRS May 18, 12:25 UTCMay 18, 16:50 UTC4h 25m
2026-05-18 SXS2HQ STR → ASR May 18, 07:45 UTCMay 18, 10:55 UTC3h 10m
2026-05-18 SXS51C ZRH → AYT May 18, 02:45 UTCMay 18, 06:05 UTC3h 20m
2026-05-17 SXS2BB FRA → AYT May 17, 18:10 UTCMay 17, 21:01 UTC2h 50m

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 TC-SMK page for operator, model, and routing details .

Mode-S 4BCDAB frequently asked

What is Mode-S code 4BCDAB?
4BCDAB is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-SMK.
Where is Mode-S 4BCDAB registered?
Mode-S code 4BCDAB is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BCDAB broadcasting right now?
Mode-S 4BCDAB is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BCDAB, octal 22746653, decimal 4,967,851.
What flights does 4BCDAB operate?
Mode-S 4BCDAB has broadcast 20 distinct callsigns, including SXS9LQ, SXS6PC, SXS5NH, SXS7TL, SXS8JE.