Apparatus

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sensors Mode-S transponder

4BCDEF

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-SOO · BOEING 737-800

Hex
4BCDEF
Octal
22746757
Decimal
4,967,919
Country
TR
Tail
TC-SOO
Type
B738
No current signal · last broadcast 1h ago
Flights observed
117
Distinct callsigns
20
Country
TR
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4BCDEF.

Country allocation

The ICAO 24-bit address 4BCDEF 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
SXS8JE SunExpress 4 2026-04-20
SXS9ZT - 3 2026-04-13
SXS93K SunExpress 3 2026-04-18
SXS8WK - 3 2026-04-13
SXS5KX SunExpress 3 2026-05-25
SXS5ET SunExpress 3 2026-04-20
SXS3BV SunExpress 3 2026-04-18
SXS21E - 3 2026-04-13
SXS8TG SunExpress 2 2026-05-28
SXS8SA - 2 2026-05-07
SXS8RG SunExpress 2 2026-05-03
SXS7EC SunExpress 2 2026-05-22
SXS75K SunExpress 2 2026-05-22
SXS6ZH - 2 2026-04-13
SXS6MF SunExpress 2 2026-05-04
SXS651 - 2 2026-04-14
SXS4UV SunExpress 2 2026-04-13
SXS4CN SunExpress 2 2026-05-06
SXS3XF SunExpress 2 2026-05-26
SXS3VG SunExpress 2 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SXS4PR AYT → HAJ May 29, 19:10 UTCMay 29, 22:35 UTC3h 25m
2026-05-29 SXS5YP AYT → FRA May 29, 13:15 UTCMay 29, 17:35 UTC4h 20m
2026-05-29 SXS9LY VIE → AYT May 29, 09:05 UTCMay 29, 11:10 UTC2h 5m
2026-05-29 SXS9HN AYT → VIE May 29, 04:40 UTCMay 29, 07:25 UTC2h 45m
2026-05-28 SXS16E BER → AYT May 28, 16:00 UTCMay 28, 18:40 UTC2h 40m
2026-05-28 SXS8TG AYT → BER May 28, 11:15 UTCMay 28, 14:30 UTC3h 15m
2026-05-28 SXS46A STR → AYT May 28, 06:25 UTCMay 28, 09:10 UTC2h 45m
2026-05-28 SXS4BW ESB → STR May 28, 02:45 UTCMay 28, 05:25 UTC2h 40m
2026-05-26 SXS3XF MUC → ESB May 26, 10:14 UTCMay 26, 12:20 UTC2h 5m
2026-05-25 SXS5KX DUS → ESB May 25, 18:55 UTCMay 26, 07:55 UTC13h 0m
2026-05-25 SXS3VG GZT → DUS May 25, 10:15 UTCMay 25, 17:20 UTC7h 5m
2026-05-25 SXS3UU ECN → AYT May 25, 07:40 UTCMay 25, 08:15 UTC35m
2026-05-25 SXS3KB BRU → ESB May 25, 05:40 UTCMay 25, 06:20 UTC40m
2026-05-25 SXS2ZN NUE → AYT May 25, 01:55 UTCMay 25, 03:50 UTC1h 55m
2026-05-24 SXS3DZ AYT → NUE May 24, 20:35 UTCMay 24, 23:35 UTC3h 0m
2026-05-24 SXS7JZ BER → AYT May 24, 15:25 UTCMay 24, 18:10 UTC2h 45m
2026-05-24 SXS37Q AYT → MUC May 24, 11:00 UTCMay 24, 13:45 UTC2h 45m
2026-05-24 SXS9UK PRG → AYT May 24, 06:30 UTCMay 24, 09:00 UTC2h 30m
2026-05-24 SXS8SR AYT → PRG May 24, 02:25 UTCMay 24, 05:10 UTC2h 45m
2026-05-23 SXS5021 RZE → AYT May 23, 22:05 UTCMay 24, 00:20 UTC2h 15m
2026-05-23 SXS5020 - May 23, 18:25 UTCMay 23, 20:45 UTC2h 20m
2026-05-23 SXS7UJ CGN → AYT May 23, 10:45 UTCMay 23, 14:00 UTC3h 15m
2026-05-23 SXS8UH AYT → ADB May 23, 05:50 UTCMay 23, 09:10 UTC3h 20m
2026-05-22 SXS75K HAJ → AYT May 22, 23:50 UTCMay 23, 03:00 UTC3h 10m
2026-05-22 SXS7EC AYT → HAJ May 22, 19:30 UTCMay 22, 22:50 UTC3h 20m
2026-05-22 SXS3WT ADB → AYT May 22, 17:20 UTCMay 22, 18:15 UTC55m
2026-05-22 SXS051 - May 22, 15:20 UTCMay 22, 15:45 UTC25m
2026-05-11 SXS054 - May 11, 03:15 UTCMay 11, 03:40 UTC25m
2026-05-10 SXS5PV MQM → ADB May 10, 18:20 UTCMay 10, 22:30 UTC4h 10m
2026-05-10 SXS8VB HAM → ADB May 10, 13:40 UTCMay 10, 16:30 UTC2h 50m
2026-05-10 SXS4AX ADB → HAM May 10, 08:50 UTCMay 10, 11:50 UTC3h 0m
2026-05-09 SXS3TE - May 9, 18:20 UTCMay 9, 21:19 UTC3h 0m
2026-05-09 SXS9QJ - May 9, 13:00 UTCMay 9, 16:50 UTC3h 50m
2026-05-09 SXS8KM NUE → AYT May 9, 09:00 UTCMay 9, 11:25 UTC2h 25m
2026-05-09 SXS6HK ADB → FRA May 9, 04:25 UTCMay 9, 07:20 UTC2h 55m
2026-05-08 SXS3NF BAL → ADB May 8, 08:14 UTCMay 8, 12:20 UTC4h 5m
2026-05-07 SXS1XE - May 7, 11:05 UTCMay 7, 11:35 UTC30m
2026-05-07 SXS8SA - May 7, 04:35 UTCMay 7, 07:00 UTC2h 25m
2026-05-06 SXS16E BER → AYT May 6, 15:55 UTCMay 6, 18:45 UTC2h 49m
2026-05-06 SXS8TG AYT → BER May 6, 11:20 UTCMay 6, 14:30 UTC3h 10m
2026-05-06 SXS4CN DUS → AYT May 6, 05:55 UTCMay 6, 09:10 UTC3h 15m
2026-05-06 SXS2CY ESB → DUS May 6, 01:40 UTCMay 6, 04:20 UTC2h 40m
2026-05-04 SXS5KX DUS → ESB May 4, 18:20 UTCMay 4, 21:00 UTC2h 41m
2026-05-04 SXS6MF AYT → RTM May 4, 13:05 UTCMay 4, 16:30 UTC3h 25m
2026-05-04 SXS6TD BRU → ADB May 4, 06:10 UTCMay 4, 08:05 UTC1h 55m
2026-05-04 SXS3DQ - May 4, 02:04 UTCMay 4, 04:24 UTC2h 20m
2026-05-03 SXS1CM BER → AYT May 3, 10:50 UTCMay 3, 13:35 UTC2h 45m
2026-05-03 SXS8RG AYT → BER May 3, 06:20 UTCMay 3, 09:15 UTC2h 55m
2026-05-02 SXS6921 - May 2, 23:15 UTCMay 2, 23:40 UTC25m
2026-05-01 SXS6920 - May 1, 09:35 UTCMay 1, 10:00 UTC25m

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

Mode-S 4BCDEF frequently asked

What is Mode-S code 4BCDEF?
4BCDEF is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-SOO.
Where is Mode-S 4BCDEF registered?
Mode-S code 4BCDEF is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BCDEF broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BCDEF, octal 22746757, decimal 4,967,919.
What flights does 4BCDEF operate?
Mode-S 4BCDEF has broadcast 20 distinct callsigns, including SXS8JE, SXS9ZT, SXS93K, SXS8WK, SXS5KX.