Apparatus

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sensors Mode-S transponder

4BA90B

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JHK · BOEING 737-800

Hex
4BA90B
Octal
22724413
Decimal
4,958,475
Country
TR
Tail
TC-JHK
Type
B738
No current signal · last broadcast Jul 26, 21:05 UTC
Flights observed
387
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 21:05 UTC

Last known position

Most recent position reported by Mode-S 4BA90B.

Country allocation

The ICAO 24-bit address 4BA90B 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
THY9YD - 6 2026-07-21
THY5VY - 6 2026-07-21
THY9SF - 4 2026-06-15
THY6ZX Turkish Airlines 4 2026-07-23
THY4SK Turkish Airlines 4 2026-07-23
THY1VT Turkish Airlines 4 2026-07-01
THY1SQ - 4 2026-06-30
THY1LB - 4 2026-07-01
THY9XN Turkish Airlines 3 2026-04-18
THY9VT Turkish Airlines 3 2026-07-24
THY9SA Turkish Airlines 3 2026-04-15
THY7YC Turkish Airlines 3 2026-06-11
THY7XZ Turkish Airlines 3 2026-05-29
THY6HL Turkish Airlines 3 2026-07-24
THY6ER - 3 2026-07-12
THY5RC Turkish Airlines 3 2026-07-24
THY4TU - 3 2026-07-06
THY3XQ - 3 2026-07-06
THY3UQ - 3 2026-07-13
THY3PX - 3 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 THY5LT HEL → ISL Jul 26, 20:35 UTCJul 26, 21:05 UTC30m
2026-07-26 THY97G ESB → VAN Jul 26, 14:40 UTCJul 26, 18:25 UTC3h 45m
2026-07-26 THY1BC IST → BIO Jul 26, 08:35 UTCJul 26, 11:05 UTC2h 30m
2026-07-26 THY8VN VIE → ESB Jul 26, 04:25 UTCJul 26, 07:15 UTC2h 51m
2026-07-25 THY7BK BJV → IST Jul 25, 21:30 UTCJul 25, 22:20 UTC50m
2026-07-25 THY4LU IST → BJV Jul 25, 19:30 UTCJul 25, 20:20 UTC50m
2026-07-25 THY6BW - Jul 25, 13:25 UTCJul 25, 16:50 UTC3h 25m
2026-07-25 THY3HM - Jul 25, 07:45 UTCJul 25, 11:20 UTC3h 35m
2026-07-24 THY5RC IST → VIE Jul 24, 23:20 UTCJul 25, 00:10 UTC50m
2026-07-24 THY9SG SZF → SAW Jul 24, 21:15 UTCJul 24, 22:05 UTC50m
2026-07-24 THY6EB IST → CDG Jul 24, 16:35 UTCJul 24, 17:45 UTC1h 10m
2026-07-24 THY5VZ IST → DNZ Jul 24, 14:00 UTCJul 24, 15:25 UTC1h 25m
2026-07-24 THY6HL NUE → IST Jul 24, 08:50 UTCJul 24, 11:00 UTC2h 10m
2026-07-24 THY9VT ESB → IGD Jul 24, 05:20 UTCJul 24, 07:40 UTC2h 20m
2026-07-23 THY6ZX RIX → IST Jul 23, 17:05 UTCJul 23, 19:50 UTC2h 45m
2026-07-23 THY4SK IST → RIX Jul 23, 13:20 UTCJul 23, 15:50 UTC2h 30m
2026-07-23 THY7MP RIX → IST Jul 23, 08:35 UTCJul 23, 11:20 UTC2h 45m
2026-07-23 THY3RK IST → RIX Jul 23, 04:15 UTCJul 23, 06:50 UTC2h 35m
2026-07-22 THY7TE - Jul 22, 17:25 UTCJul 22, 20:25 UTC3h 0m
2026-07-22 THY6XJ - Jul 22, 12:15 UTCJul 22, 15:50 UTC3h 35m
2026-07-22 THY7XE IST → ERZ Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-21 THY9YD - Jul 21, 18:10 UTCJul 21, 19:20 UTC1h 10m
2026-07-21 THY5VY - Jul 21, 16:05 UTCJul 21, 17:00 UTC55m
2026-07-21 THY3AN SOF → IST Jul 21, 13:00 UTCJul 21, 13:50 UTC50m
2026-07-21 THY9UH SOF → IST Jul 21, 11:05 UTCJul 21, 11:50 UTC45m
2026-07-21 THY4UF IST → BEG Jul 21, 04:50 UTCJul 21, 08:25 UTC3h 35m
2026-07-20 THY2RK IST → ERZ Jul 20, 18:00 UTCJul 20, 22:00 UTC4h 0m
2026-07-20 THY143 RUH → IST Jul 20, 10:55 UTCJul 20, 12:45 UTC1h 50m
2026-07-20 THY142 IST → RUH Jul 20, 04:40 UTCJul 20, 06:30 UTC1h 50m
2026-07-19 THY7DH IST → BRU Jul 19, 18:15 UTCJul 19, 20:50 UTC2h 35m
2026-07-19 THY5HK - Jul 19, 14:10 UTCJul 19, 17:05 UTC2h 55m
2026-07-19 THY5VQ - Jul 19, 07:20 UTCJul 19, 11:10 UTC3h 50m
2026-07-18 THY4AE SSH → IST Jul 18, 23:25 UTCJul 19, 05:30 UTC6h 5m
2026-07-18 THY2QT - Jul 18, 17:40 UTCJul 18, 19:10 UTC1h 30m
2026-07-18 THY6RZ WAW → IST Jul 18, 16:15 UTCJul 18, 16:25 UTC10m
2026-07-18 THY6RZ WAW → IST Jul 18, 15:00 UTCJul 18, 15:25 UTC25m
2026-07-18 THY8PN - Jul 18, 03:50 UTCJul 18, 10:00 UTC6h 10m
2026-07-17 THY67W - Jul 17, 18:25 UTCJul 17, 20:20 UTC1h 55m
2026-07-17 THY5ST - Jul 17, 14:10 UTCJul 17, 16:19 UTC2h 10m
2026-07-17 THY6GD - Jul 17, 08:54 UTCJul 17, 11:25 UTC2h 30m
2026-07-17 THY5RN SZG → IST Jul 17, 04:54 UTCJul 17, 07:44 UTC2h 50m
2026-07-16 THY84X BSL → IST Jul 16, 20:09 UTCJul 16, 22:35 UTC2h 25m
2026-07-16 THY1925 STR → BSL Jul 16, 18:00 UTCJul 16, 18:34 UTC35m
2026-07-16 THY1FY - Jul 16, 14:35 UTCJul 16, 16:49 UTC2h 15m
2026-07-16 THY6WQ - Jul 16, 08:40 UTCJul 16, 11:05 UTC2h 25m
2026-07-16 THY6XK - Jul 16, 05:10 UTCJul 16, 07:30 UTC2h 20m
2026-07-15 THY5RC - Jul 15, 23:20 UTCJul 16, 00:05 UTC45m
2026-07-15 THY9SG - Jul 15, 21:15 UTCJul 15, 22:10 UTC55m
2026-07-15 THY9YD - Jul 15, 18:10 UTCJul 15, 19:20 UTC1h 10m
2026-07-15 THY5VY - Jul 15, 16:15 UTCJul 15, 17:15 UTC1h 0m

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

Mode-S 4BA90B frequently asked

What is Mode-S code 4BA90B?
4BA90B is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JHK.
Where is Mode-S 4BA90B registered?
Mode-S code 4BA90B is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BA90B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BA90B, octal 22724413, decimal 4,958,475.
What flights does 4BA90B operate?
Mode-S 4BA90B has broadcast 20 distinct callsigns, including THY9YD, THY5VY, THY9SF, THY6ZX, THY4SK.