Apparatus

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sensors Mode-S transponder

4B9E4B

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-GRK · BOEING 737 MAX 8

Hex
4B9E4B
Octal
22717113
Decimal
4,955,723
Country
TR
Tail
TC-GRK
Type
B38M
No current signal · last broadcast Jul 26, 16:20 UTC
Flights observed
356
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 16:20 UTC

Last known position

Most recent position reported by Mode-S 4B9E4B.

Country allocation

The ICAO 24-bit address 4B9E4B 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
STW322 - 37 2026-07-18
STW321 South West Air Corporation 34 2026-07-18
STW383 South West Air Corporation 27 2026-06-17
STW040 South West Air Corporation 24 2026-06-20
STW039 South West Air Corporation 24 2026-06-19
STW384 South West Air Corporation 23 2026-06-18
STW063 South West Air Corporation 20 2026-07-26
STW197 South West Air Corporation 16 2026-07-26
STW358 - 15 2026-07-23
STW198 South West Air Corporation 15 2026-07-26
STW173 South West Air Corporation 10 2026-07-24
STW357 South West Air Corporation 8 2026-07-23
STW085 South West Air Corporation 6 2026-07-24
STW372 - 5 2026-07-07
STW371 South West Air Corporation 5 2026-07-21
STW123 South West Air Corporation 5 2026-07-25
STW6708 - 4 2026-06-08
STW283 - 4 2026-07-16
STW174 South West Air Corporation 4 2026-07-20
STW171 South West Air Corporation 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 STW063 AYT → TJM Jul 26, 14:35 UTCJul 26, 16:20 UTC1h 45m
2026-07-26 STW198 AER → AYT Jul 26, 10:15 UTCJul 26, 11:45 UTC1h 30m
2026-07-26 STW197 AYT → AER Jul 26, 06:25 UTCJul 26, 07:35 UTC1h 11m
2026-07-26 STW284 ZIA → AYT Jul 26, 01:25 UTCJul 26, 03:40 UTC2h 15m
2026-07-25 STW284 ZIA → AYT Jul 25, 23:25 UTCJul 26, 00:00 UTC35m
2026-07-25 STW123 IST → ZIA Jul 25, 18:40 UTCJul 25, 21:05 UTC2h 25m
2026-07-25 STW171 DLM → SVO Jul 25, 06:55 UTCJul 25, 15:45 UTC8h 50m
2026-07-24 STW085 IST → SVO Jul 24, 17:30 UTCJul 25, 02:30 UTC9h 0m
2026-07-24 STW173 AYT → SVO Jul 24, 06:40 UTCJul 24, 16:15 UTC9h 35m
2026-07-23 STW063 AYT → TJM Jul 23, 16:40 UTCJul 24, 03:30 UTC10h 50m
2026-07-23 STW358 - Jul 23, 11:55 UTCJul 23, 13:45 UTC1h 50m
2026-07-23 STW358 GSV → GSV Jul 23, 09:55 UTCJul 23, 10:05 UTC10m
2026-07-23 STW357 AYT → GSV Jul 23, 05:20 UTCJul 23, 07:00 UTC1h 40m
2026-07-22 STW063 AYT → TJM Jul 22, 16:50 UTCJul 23, 03:25 UTC10h 35m
2026-07-22 STW358 - Jul 22, 04:15 UTCJul 22, 12:55 UTC8h 40m
2026-07-21 STW371 AYT → KUF Jul 21, 14:20 UTCJul 21, 23:10 UTC8h 50m
2026-07-21 STW198 AER → AYT Jul 21, 12:30 UTCJul 21, 13:00 UTC30m
2026-07-21 STW197 AYT → AER Jul 21, 08:25 UTCJul 21, 09:45 UTC1h 20m
2026-07-20 STW063 AYT → TJM Jul 20, 16:35 UTCJul 21, 03:40 UTC11h 4m
2026-07-20 STW174 SVO → AYT Jul 20, 10:35 UTCJul 20, 13:10 UTC2h 35m
2026-07-20 STW173 AYT → SVO Jul 20, 03:25 UTCJul 20, 06:25 UTC3h 0m
2026-07-19 STW063 AYT → TJM Jul 19, 14:35 UTCJul 20, 01:30 UTC10h 55m
2026-07-19 STW198 AER → AYT Jul 19, 11:05 UTCJul 19, 11:40 UTC35m
2026-07-19 STW197 - Jul 19, 06:35 UTCJul 19, 08:00 UTC1h 25m
2026-07-19 STW064 TJM → AYT Jul 19, 03:10 UTCJul 19, 03:30 UTC20m
2026-07-18 STW063 AYT → TJM Jul 18, 16:50 UTCJul 19, 02:30 UTC9h 40m
2026-07-18 STW322 - Jul 18, 07:45 UTCJul 18, 08:45 UTC1h 0m
2026-07-18 STW321 AYT → KRR Jul 18, 03:40 UTCJul 18, 05:05 UTC1h 25m
2026-07-18 STW358 - Jul 18, 01:05 UTCJul 18, 01:45 UTC40m
2026-07-17 STW357 AYT → GSV Jul 17, 17:20 UTCJul 17, 19:05 UTC1h 45m
2026-07-17 STW322 - Jul 17, 11:15 UTCJul 17, 11:50 UTC35m
2026-07-17 STW321 AYT → KRR Jul 17, 06:10 UTCJul 17, 06:25 UTC15m
2026-07-16 STW083 - Jul 16, 17:14 UTCJul 17, 03:25 UTC10h 10m
2026-07-16 STW283 - Jul 16, 06:25 UTCJul 16, 15:25 UTC9h 0m
2026-07-15 STW063 - Jul 15, 16:35 UTCJul 16, 03:45 UTC11h 10m
2026-07-15 STW322 - Jul 15, 11:20 UTCJul 15, 11:55 UTC35m
2026-07-15 STW321 - Jul 15, 06:25 UTCJul 15, 07:45 UTC1h 20m
2026-07-15 STW358 - Jul 15, 00:40 UTCJul 15, 01:45 UTC1h 5m
2026-07-14 STW358 GSV → GSV Jul 14, 22:05 UTCJul 14, 22:10 UTC5m
2026-07-14 STW357 - Jul 14, 17:10 UTCJul 14, 18:50 UTC1h 40m
2026-07-14 STW198 - Jul 14, 11:05 UTCJul 14, 11:45 UTC40m
2026-07-14 STW197 - Jul 14, 06:35 UTCJul 14, 07:50 UTC1h 15m
2026-07-13 STW123 - Jul 13, 18:35 UTCJul 14, 03:25 UTC8h 50m
2026-07-13 STW173 - Jul 13, 06:55 UTCJul 13, 17:00 UTC10h 5m
2026-07-12 STW063 AYT → AYT Jul 12, 15:01 UTCJul 13, 01:30 UTC10h 30m
2026-07-12 STW198 - Jul 12, 13:05 UTCJul 12, 13:30 UTC25m
2026-07-12 STW197 - Jul 12, 06:25 UTCJul 12, 06:45 UTC20m
2026-07-11 STW063 - Jul 11, 16:40 UTCJul 12, 03:35 UTC10h 55m
2026-07-11 STW322 - Jul 11, 03:40 UTCJul 11, 09:10 UTC5h 30m
2026-07-10 STW358 - Jul 10, 17:20 UTCJul 11, 01:45 UTC8h 26m

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

Mode-S 4B9E4B frequently asked

What is Mode-S code 4B9E4B?
4B9E4B is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-GRK.
Where is Mode-S 4B9E4B registered?
Mode-S code 4B9E4B is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B9E4B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B9E4B, octal 22717113, decimal 4,955,723.
What flights does 4B9E4B operate?
Mode-S 4B9E4B has broadcast 20 distinct callsigns, including STW322, STW321, STW383, STW040, STW039.