Apparatus

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sensors Mode-S transponder

4BA953

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JJS · BOEING 777-300ER

Hex
4BA953
Octal
22724523
Decimal
4,958,547
Country
TR
Tail
TC-JJS
Type
B77W
No current signal · last broadcast Jul 26, 19:25 UTC
Flights observed
242
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 19:25 UTC

Last known position

Most recent position reported by Mode-S 4BA953.

Country allocation

The ICAO 24-bit address 4BA953 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
THY90 - 17 2026-07-06
THY91 Turkish Airlines 14 2026-07-07
THY77J Turkish Airlines 10 2026-07-23
THY21 Turkish Airlines 10 2026-07-18
THY199 Turkish Airlines 10 2026-07-23
THY99D Turkish Airlines 9 2026-07-24
THY89 - 9 2026-07-19
THY88 Turkish Airlines 9 2026-07-19
THY73 - 7 2026-07-02
THY20 Turkish Airlines 7 2026-07-17
THY8XS - 5 2026-07-11
THY198 Turkish Airlines 5 2026-07-21
THY1 Turkish Airlines 5 2026-07-07
THY71 Turkish Airlines 4 2026-05-13
THY70 Turkish Airlines 4 2026-05-13
THY3YH Turkish Airlines 4 2026-06-10
THY2NP Turkish Airlines 4 2026-06-10
THY2 - 4 2026-07-08
THY9 Turkish Airlines 3 2026-06-10
THY8LV - 3 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 THY4 JFK → IST Jul 26, 18:00 UTCJul 26, 19:25 UTC1h 25m
2026-07-26 THY3 IST → JFK Jul 26, 05:15 UTCJul 26, 15:05 UTC9h 51m
2026-07-26 THY55 SIN → IST Jul 26, 01:15 UTCJul 26, 01:40 UTC25m
2026-07-25 THY55 SIN → IST Jul 25, 15:25 UTCJul 26, 00:40 UTC9h 15m
2026-07-25 THY54 IST → SIN Jul 25, 02:05 UTCJul 25, 10:50 UTC8h 45m
2026-07-25 THY54 IST → SIN Jul 25, 00:40 UTCJul 25, 01:05 UTC25m
2026-07-24 THY3AX IST → ADB Jul 24, 21:20 UTCJul 24, 22:20 UTC1h 0m
2026-07-24 THY2XQ IST → ATH Jul 24, 18:20 UTCJul 24, 19:25 UTC1h 5m
2026-07-24 THY99D MIA → IST Jul 24, 04:05 UTCJul 24, 14:30 UTC10h 25m
2026-07-23 THY77J IST → MIA Jul 23, 14:35 UTCJul 24, 01:40 UTC11h 5m
2026-07-23 THY2JT FCO → IST Jul 23, 09:40 UTCJul 23, 11:30 UTC1h 50m
2026-07-23 THY6AG IST → FCO Jul 23, 05:00 UTCJul 23, 07:05 UTC2h 5m
2026-07-23 THY199 HND → IST Jul 23, 00:45 UTCJul 23, 01:25 UTC40m
2026-07-22 THY199 HND → IST Jul 22, 13:15 UTCJul 23, 00:05 UTC10h 50m
2026-07-21 THY198 IST → HND Jul 21, 23:30 UTCJul 22, 10:25 UTC10h 55m
2026-07-21 THY2AY IAH → IST Jul 21, 03:20 UTCJul 21, 14:35 UTC11h 15m
2026-07-20 THY5KM - Jul 20, 11:50 UTCJul 21, 00:05 UTC12h 14m
2026-07-19 THY89 - Jul 19, 23:40 UTCJul 20, 01:00 UTC1h 20m
2026-07-19 THY88 IST → PEK Jul 19, 06:25 UTCJul 19, 06:40 UTC15m
2026-07-19 THY88 IST → PEK Jul 19, 00:00 UTCJul 19, 01:00 UTC1h 0m
2026-07-18 THY21 PEK → IST Jul 18, 02:55 UTCJul 18, 12:35 UTC9h 40m
2026-07-18 THY21 PEK → IST Jul 18, 01:45 UTCJul 18, 02:00 UTC15m
2026-07-17 THY20 IST → ICN Jul 17, 22:40 UTCJul 17, 23:00 UTC20m
2026-07-17 THY20 IST → ICN Jul 17, 14:20 UTCJul 17, 21:55 UTC7h 35m
2026-07-15 THY4 - Jul 15, 18:05 UTCJul 16, 03:05 UTC9h 0m
2026-07-15 THY3 - Jul 15, 04:45 UTCJul 15, 14:55 UTC10h 10m
2026-07-15 THY85 - Jul 15, 00:40 UTCJul 15, 01:00 UTC20m
2026-07-14 THY85 - Jul 14, 13:50 UTCJul 15, 00:10 UTC10h 19m
2026-07-13 THY84 - Jul 13, 23:55 UTCJul 14, 11:00 UTC11h 5m
2026-07-13 THY4BV - Jul 13, 18:30 UTCJul 13, 20:25 UTC1h 55m
2026-07-13 THY6EK - Jul 13, 14:25 UTCJul 13, 16:35 UTC2h 10m
2026-07-13 THY21 - Jul 13, 09:55 UTCJul 13, 12:10 UTC2h 15m
2026-07-13 THY21 - Jul 13, 01:40 UTCJul 13, 01:55 UTC15m
2026-07-12 THY20 - Jul 12, 22:55 UTCJul 12, 23:15 UTC20m
2026-07-12 THY20 - Jul 12, 14:25 UTCJul 12, 22:00 UTC7h 35m
2026-07-12 THY6 - Jul 12, 01:20 UTCJul 12, 11:20 UTC10h 0m
2026-07-11 THY5 - Jul 11, 12:15 UTCJul 11, 22:55 UTC10h 40m
2026-07-11 THY8XS - Jul 11, 08:35 UTCJul 11, 09:35 UTC1h 0m
2026-07-11 THY8HX - Jul 11, 05:45 UTCJul 11, 06:40 UTC55m
2026-07-10 THY89 - Jul 10, 17:15 UTCJul 11, 02:35 UTC9h 20m
2026-07-10 THY88 - Jul 10, 06:55 UTCJul 10, 07:20 UTC25m
2026-07-09 THY88 - Jul 9, 23:20 UTCJul 10, 01:05 UTC1h 45m
2026-07-09 THY99D - Jul 9, 10:50 UTCJul 9, 14:30 UTC3h 40m
2026-07-09 THY99D - Jul 9, 03:30 UTCJul 9, 06:55 UTC3h 25m
2026-07-08 THY77J - Jul 8, 13:40 UTCJul 9, 00:45 UTC11h 5m
2026-07-08 THY2 - Jul 8, 00:20 UTCJul 8, 09:30 UTC9h 10m
2026-07-07 THY1 IST → JFK Jul 7, 11:55 UTCJul 7, 21:55 UTC10h 0m
2026-07-07 THY91 ICN → IST Jul 7, 00:40 UTCJul 7, 00:50 UTC10m
2026-07-06 THY91 ICN → IST Jul 6, 14:20 UTCJul 6, 23:50 UTC9h 30m
2026-07-06 THY90 - Jul 6, 07:55 UTCJul 6, 08:15 UTC20m

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

Mode-S 4BA953 frequently asked

What is Mode-S code 4BA953?
4BA953 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JJS.
Where is Mode-S 4BA953 registered?
Mode-S code 4BA953 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BA953 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BA953, octal 22724523, decimal 4,958,547.
What flights does 4BA953 operate?
Mode-S 4BA953 has broadcast 20 distinct callsigns, including THY90, THY91, THY77J, THY21, THY199.