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 1h ago
Flights observed
173
Distinct callsigns
20
Country
TR
Last broadcast
1h ago

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 South West Air Corporation 22 2026-05-28
STW321 South West Air Corporation 22 2026-05-30
STW039 South West Air Corporation 16 2026-05-29
STW040 South West Air Corporation 13 2026-05-29
STW384 South West Air Corporation 12 2026-05-27
STW383 South West Air Corporation 12 2026-05-27
STW371 South West Air Corporation 4 2026-04-19
STW173 South West Air Corporation 4 2026-05-10
STW098 South West Air Corporation 4 2026-04-18
STW085 South West Air Corporation 4 2026-05-06
STW084 South West Air Corporation 4 2026-05-14
STW372 South West Air Corporation 3 2026-04-17
STW305 South West Air Corporation 3 2026-04-21
STW198 South West Air Corporation 3 2026-05-17
STW197 South West Air Corporation 3 2026-05-17
STW142 South West Air Corporation 3 2026-04-17
STW141 South West Air Corporation 3 2026-04-18
STW026 - 3 2026-04-21
STW306 South West Air Corporation 2 2026-04-22
STW174 South West Air Corporation 2 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 STW321 AYT → KRR May 30, 03:40 UTCMay 30, 04:05 UTC25m
2026-05-29 STW039 AYT → REN May 29, 15:00 UTCMay 30, 00:35 UTC9h 35m
2026-05-29 STW321 AYT → KRR May 29, 03:25 UTCMay 29, 08:55 UTC5h 30m
2026-05-29 STW040 REN → AYT May 29, 00:10 UTCMay 29, 00:25 UTC15m
2026-05-28 STW039 AYT → REN May 28, 15:00 UTCMay 28, 16:45 UTC1h 45m
2026-05-28 STW322 KRR → AYT May 28, 04:15 UTCMay 28, 09:55 UTC5h 40m
2026-05-27 STW384 ARH → AYT May 27, 22:50 UTCMay 28, 01:55 UTC3h 5m
2026-05-27 STW383 AYT → ARH May 27, 19:00 UTCMay 27, 19:10 UTC10m
2026-05-27 STW383 AYT → ARH May 27, 14:20 UTCMay 27, 18:25 UTC4h 5m
2026-05-27 STW322 KRR → AYT May 27, 08:30 UTCMay 27, 09:00 UTC30m
2026-05-27 STW321 AYT → KRR May 27, 03:39 UTCMay 27, 03:50 UTC10m
2026-05-27 STW040 REN → AYT May 27, 00:00 UTCMay 27, 00:19 UTC20m
2026-05-26 STW039 AYT → REN May 26, 15:05 UTCMay 26, 23:25 UTC8h 20m
2026-05-26 STW322 KRR → AYT May 26, 08:39 UTCMay 26, 09:25 UTC45m
2026-05-26 STW321 AYT → KRR May 26, 03:35 UTCMay 26, 05:05 UTC1h 30m
2026-05-26 STW384 ARH → AYT May 26, 00:00 UTCMay 26, 02:10 UTC2h 10m
2026-05-25 STW383 AYT → ARH May 25, 14:30 UTCMay 25, 18:40 UTC4h 10m
2026-05-25 STW6708 - May 25, 02:00 UTCMay 25, 10:40 UTC8h 40m
2026-05-24 STW039 AYT → REN May 24, 15:00 UTCMay 24, 23:25 UTC8h 25m
2026-05-24 STW322 KRR → AYT May 24, 08:35 UTCMay 24, 08:50 UTC15m
2026-05-24 STW321 AYT → KRR May 24, 03:45 UTCMay 24, 04:00 UTC15m
2026-05-23 STW383 AYT → ARH May 23, 14:50 UTCMay 24, 02:35 UTC11h 46m
2026-05-23 STW322 KRR → AYT May 23, 11:15 UTCMay 23, 11:35 UTC20m
2026-05-23 STW321 AYT → KRR May 23, 06:30 UTCMay 23, 06:40 UTC10m
2026-05-22 STW040 REN → AYT May 22, 23:45 UTCMay 23, 00:05 UTC20m
2026-05-22 STW039 AYT → REN May 22, 15:00 UTCMay 22, 16:55 UTC1h 55m
2026-05-22 STW322 KRR → AYT May 22, 07:45 UTCMay 22, 08:50 UTC1h 5m
2026-05-22 STW321 AYT → KRR May 22, 03:35 UTCMay 22, 03:50 UTC15m
2026-05-22 STW040 REN → AYT May 22, 00:00 UTCMay 22, 00:20 UTC20m
2026-05-21 STW039 AYT → REN May 21, 15:10 UTCMay 21, 23:20 UTC8h 10m
2026-05-21 STW322 KRR → AYT May 21, 07:45 UTCMay 21, 08:55 UTC1h 10m
2026-05-21 STW384 ARH → AYT May 21, 00:00 UTCMay 21, 02:15 UTC2h 15m
2026-05-20 STW383 AYT → ARH May 20, 14:35 UTCMay 20, 18:25 UTC3h 50m
2026-05-19 STW039 AYT → REN May 19, 14:50 UTCMay 19, 23:10 UTC8h 20m
2026-05-19 STW322 KRR → AYT May 19, 08:35 UTCMay 19, 09:15 UTC40m
2026-05-19 STW322 KRR → AYT May 19, 07:45 UTCMay 19, 08:00 UTC15m
2026-05-19 STW321 AYT → KRR May 19, 03:35 UTCMay 19, 03:45 UTC10m
2026-05-19 STW384 ARH → AYT May 19, 00:00 UTCMay 19, 02:10 UTC2h 10m
2026-05-18 STW383 AYT → ARH May 18, 14:20 UTCMay 18, 19:05 UTC4h 44m
2026-05-18 STW040 REN → AYT May 18, 00:00 UTCMay 18, 00:15 UTC15m
2026-05-17 STW039 AYT → REN May 17, 15:05 UTCMay 17, 23:05 UTC8h 0m
2026-05-17 STW198 AER → AYT May 17, 11:25 UTCMay 17, 11:35 UTC10m
2026-05-17 STW197 AYT → AER May 17, 06:25 UTCMay 17, 06:35 UTC10m
2026-05-17 STW064 TJM → AYT May 17, 03:20 UTCMay 17, 03:35 UTC15m
2026-05-16 STW063 AYT → TJM May 16, 16:35 UTCMay 17, 02:25 UTC9h 50m
2026-05-16 STW322 KRR → AYT May 16, 13:35 UTCMay 16, 14:46 UTC1h 10m
2026-05-16 STW321 AYT → KRR May 16, 09:06 UTCMay 16, 09:16 UTC10m
2026-05-15 STW040 REN → AYT May 15, 23:55 UTCMay 16, 00:10 UTC15m
2026-05-15 STW039 AYT → REN May 15, 15:00 UTCMay 15, 23:10 UTC8h 10m
2026-05-15 STW321 AYT → KRR May 15, 03:45 UTCMay 15, 03:55 UTC10m

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 1h ago.
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, STW039, STW040, STW384.