Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4BA901

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JHA · BOEING 737-800

Hex
4BA901
Octal
22724401
Decimal
4,958,465
Country
TR
Tail
TC-JHA
Type
B738
No current signal · last broadcast 2h ago
Flights observed
252
Distinct callsigns
20
Country
TR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4BA901.

Country allocation

The ICAO 24-bit address 4BA901 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
TKJ8MY - 12 2026-07-05
TKJ4CM - 11 2026-07-06
TKJ3SY Tarkim Havacilik 6 2026-06-20
TKJ8AT Tarkim Havacilik 5 2026-04-26
TKJ2HX - 5 2026-06-18
TKJ8RG - 4 2026-06-13
TKJ5YQ - 4 2026-06-28
TKJ5QY Tarkim Havacilik 4 2026-05-02
TKJ317 Tarkim Havacilik 4 2026-06-20
TKJ2MS Tarkim Havacilik 4 2026-05-02
TKJ71U - 3 2026-06-16
TKJ4FC - 3 2026-06-17
TKJ2PC Tarkim Havacilik 3 2026-06-17
TKJ1PR - 3 2026-04-26
TKJ1NB - 3 2026-06-29
TKJ15J Tarkim Havacilik 3 2026-04-21
TKJ9NC Tarkim Havacilik 2 2026-06-25
TKJ9BH - 2 2026-06-19
TKJ97R - 2 2026-07-04
TKJ93J - 2 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TKJ5313 - Jul 14, 13:15 UTCJul 14, 13:40 UTC25m
2026-07-14 TKJ5312 - Jul 14, 11:35 UTCJul 14, 12:00 UTC25m
2026-07-14 TKJ3BW - Jul 14, 08:05 UTCJul 14, 08:30 UTC25m
2026-07-13 TKJ6LN - Jul 13, 15:20 UTCJul 14, 06:45 UTC15h 25m
2026-07-13 TKJ2GQ - Jul 13, 13:05 UTCJul 13, 13:55 UTC50m
2026-07-13 TKJ4MV - Jul 13, 10:50 UTCJul 13, 11:50 UTC1h 0m
2026-07-13 TKJ3ZK - Jul 13, 02:01 UTCJul 13, 02:10 UTC10m
2026-07-12 TKJ1RJ - Jul 12, 22:05 UTCJul 12, 22:15 UTC10m
2026-07-12 TKJ1ZL - Jul 12, 02:05 UTCJul 12, 02:40 UTC35m
2026-07-11 TKJ4KW - Jul 11, 21:50 UTCJul 11, 22:40 UTC50m
2026-07-10 TKJ45N - Jul 10, 18:35 UTCJul 10, 19:00 UTC25m
2026-07-10 TKJ63U - Jul 10, 16:45 UTCJul 10, 17:25 UTC40m
2026-07-10 TKJ3PT - Jul 10, 02:00 UTCJul 10, 02:20 UTC20m
2026-07-09 TKJ29W - Jul 9, 19:45 UTCJul 9, 22:45 UTC3h 0m
2026-07-09 TKJ4HS - Jul 9, 17:55 UTCJul 9, 18:15 UTC20m
2026-07-09 TKJ6750 - Jul 9, 04:30 UTCJul 9, 04:45 UTC15m
2026-07-08 TKJ6172 - Jul 8, 18:40 UTCJul 9, 03:10 UTC8h 30m
2026-07-06 TKJ1DC - Jul 6, 09:35 UTCJul 7, 01:20 UTC15h 45m
2026-07-06 TKJ4CM - Jul 6, 05:20 UTCJul 6, 07:00 UTC1h 40m
2026-07-05 TKJ8MY - Jul 5, 21:40 UTCJul 6, 00:45 UTC3h 5m
2026-07-05 TKJ8ZE - Jul 5, 01:55 UTCJul 5, 02:30 UTC35m
2026-07-04 TKJ97R - Jul 4, 14:25 UTCJul 4, 22:20 UTC7h 55m
2026-07-04 TKJ5305 - Jul 4, 07:45 UTCJul 4, 08:30 UTC45m
2026-07-04 TKJ5304 - Jul 4, 05:55 UTCJul 4, 06:40 UTC45m
2026-07-04 TKJ8ZE - Jul 4, 02:00 UTCJul 4, 02:30 UTC30m
2026-07-03 TKJ592 - Jul 3, 15:20 UTCJul 3, 22:55 UTC7h 35m
2026-07-03 TKJ591 - Jul 3, 13:25 UTCJul 3, 14:15 UTC50m
2026-07-02 TKJ4CM - Jul 2, 21:25 UTCJul 3, 06:30 UTC9h 5m
2026-07-01 TKJ633 - Jul 1, 21:40 UTCJul 2, 01:00 UTC3h 20m
2026-07-01 TKJ4043 - Jul 1, 15:35 UTCJul 1, 16:15 UTC40m
2026-07-01 TKJ2GQ - Jul 1, 13:10 UTCJul 1, 14:05 UTC55m
2026-07-01 TKJ4MV - Jul 1, 11:00 UTCJul 1, 12:05 UTC1h 5m
2026-07-01 TKJ4042 - Jul 1, 08:40 UTCJul 1, 09:25 UTC45m
2026-06-30 TKJ8MY - Jun 30, 21:35 UTCJul 1, 06:30 UTC8h 55m
2026-06-29 TKJ1NB - Jun 29, 14:29 UTCJun 29, 14:44 UTC15m
2026-06-29 TKJ4AN - Jun 29, 01:20 UTCJun 29, 13:04 UTC11h 45m
2026-06-28 TKJ3TQ - Jun 28, 21:40 UTCJun 28, 22:39 UTC1h 0m
2026-06-28 TKJ5YQ - Jun 28, 18:34 UTCJun 28, 19:14 UTC40m
2026-06-28 TKJ5UT - Jun 28, 12:19 UTCJun 28, 17:10 UTC4h 50m
2026-06-28 TKJ7ZB - Jun 28, 05:49 UTCJun 28, 06:20 UTC30m
2026-06-28 TKJ5SE - Jun 28, 02:49 UTCJun 28, 04:15 UTC1h 25m
2026-06-27 TKJ35M - Jun 27, 23:34 UTCJun 28, 01:04 UTC1h 30m
2026-06-27 TKJ5JC - Jun 27, 18:24 UTCJun 27, 22:09 UTC3h 45m
2026-06-27 TKJ5305 - Jun 27, 13:20 UTCJun 27, 14:05 UTC45m
2026-06-27 TKJ5304 - Jun 27, 11:39 UTCJun 27, 12:19 UTC40m
2026-06-27 TKJ5303 - Jun 27, 09:15 UTCJun 27, 10:05 UTC50m
2026-06-27 TKJ5302 - Jun 27, 05:10 UTCJun 27, 08:10 UTC3h 0m
2026-06-26 TKJ4MG - Jun 26, 21:30 UTCJun 27, 03:34 UTC6h 5m
2026-06-26 TKJ591 - Jun 26, 13:04 UTCJun 26, 19:50 UTC6h 45m
2026-06-26 TKJ58D - Jun 26, 10:25 UTCJun 26, 11:05 UTC40m

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

Mode-S 4BA901 frequently asked

What is Mode-S code 4BA901?
4BA901 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JHA.
Where is Mode-S 4BA901 registered?
Mode-S code 4BA901 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BA901 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BA901, octal 22724401, decimal 4,958,465.
What flights does 4BA901 operate?
Mode-S 4BA901 has broadcast 20 distinct callsigns, including TKJ8MY, TKJ4CM, TKJ3SY, TKJ8AT, TKJ2HX.