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 3h ago
Flights observed
115
Distinct callsigns
20
Country
TR
Last broadcast
3h ago

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 Turkish Airlines 7 2026-05-31
THY91 Turkish Airlines 6 2026-05-31
THY77J Turkish Airlines 6 2026-04-29
THY21 Turkish Airlines 6 2026-05-30
THY73 Turkish Airlines 5 2026-05-20
THY99D Turkish Airlines 4 2026-04-30
THY71 Turkish Airlines 4 2026-05-13
THY70 Turkish Airlines 4 2026-05-13
THY8XS Turkish Airlines 3 2026-05-14
THY89 Turkish Airlines 3 2026-06-02
THY88 Turkish Airlines 3 2026-06-01
THY3YH Turkish Airlines 3 2026-05-26
THY2NP Turkish Airlines 3 2026-05-26
THY20 Turkish Airlines 3 2026-05-29
THY1 Turkish Airlines 3 2026-05-06
THY9 Turkish Airlines 2 2026-05-21
THY86 Turkish Airlines 2 2026-04-23
THY72 Turkish Airlines 2 2026-05-20
THY6 Turkish Airlines 2 2026-05-17
THY5 Turkish Airlines 2 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 THY89 PEK → IST Jun 2, 17:00 UTCJun 2, 17:15 UTC15m
2026-06-01 THY88 IST → PEK Jun 1, 23:00 UTCJun 2, 00:45 UTC1h 45m
2026-05-31 THY91 ICN → IST May 31, 14:30 UTCMay 31, 14:45 UTC15m
2026-05-31 THY90 IST → ICN May 31, 08:25 UTCMay 31, 08:40 UTC15m
2026-05-30 THY90 IST → ICN May 30, 23:25 UTCMay 31, 01:11 UTC1h 46m
2026-05-30 THY7ER BJV → IST May 30, 18:40 UTCMay 30, 19:50 UTC1h 10m
2026-05-30 THY1FC LUX → IST May 30, 15:55 UTCMay 30, 16:45 UTC50m
2026-05-30 THY21 PEK → IST May 30, 12:20 UTCMay 30, 12:35 UTC15m
2026-05-30 THY21 PEK → IST May 30, 10:20 UTCMay 30, 11:35 UTC1h 15m
2026-05-30 THY21 PEK → IST May 30, 01:30 UTCMay 30, 01:45 UTC15m
2026-05-29 THY20 IST → ICN May 29, 22:55 UTCMay 29, 23:15 UTC20m
2026-05-29 THY20 IST → ICN May 29, 14:10 UTCMay 29, 22:10 UTC8h 0m
2026-05-29 THY89 PEK → IST May 29, 01:45 UTCMay 29, 02:00 UTC15m
2026-05-28 THY89 PEK → IST May 28, 16:30 UTCMay 28, 16:45 UTC15m
2026-05-28 THY88 IST → PEK May 28, 07:20 UTCMay 28, 07:40 UTC20m
2026-05-27 THY88 IST → PEK May 27, 23:45 UTCMay 28, 01:40 UTC1h 55m
2026-05-27 THY5YR DFW → IST May 27, 04:30 UTCMay 27, 15:10 UTC10h 40m
2026-05-26 THY83J IST → DFW May 26, 12:14 UTCMay 27, 00:44 UTC12h 30m
2026-05-26 THY2NP AYT → VKO May 26, 07:40 UTCMay 26, 07:59 UTC20m
2026-05-26 THY3YH IST → BOD May 26, 05:25 UTCMay 26, 05:54 UTC30m
2026-05-25 THY301 NRT → IST May 25, 12:40 UTCMay 25, 15:40 UTC3h 0m
2026-05-25 THY300 IST → NRT May 25, 08:35 UTCMay 25, 10:30 UTC1h 55m
2026-05-24 THY300 IST → NRT May 24, 23:40 UTCMay 24, 23:46 UTC6m
2026-05-24 THY4YH ADB → IST May 24, 19:05 UTCMay 24, 19:45 UTC40m
2026-05-24 THY80E IST → ADB May 24, 16:45 UTCMay 24, 17:20 UTC35m
2026-05-24 THY76Y YVR → IST May 24, 03:25 UTCMay 24, 14:00 UTC10h 35m
2026-05-23 THY75D IST → YVR May 23, 13:00 UTCMay 24, 01:00 UTC12h 1m
2026-05-23 THY32W DEL → IST May 23, 07:50 UTCMay 23, 08:00 UTC10m
2026-05-23 THY32W DEL → IST May 23, 01:40 UTCMay 23, 02:45 UTC1h 4m
2026-05-22 THY51Q IST → DEL May 22, 19:25 UTCMay 22, 23:45 UTC4h 20m
2026-05-22 THY10 LAX → IST May 22, 03:50 UTCMay 22, 16:05 UTC12h 15m
2026-05-21 THY9 IST → LAX May 21, 12:35 UTCMay 22, 01:35 UTC13h 0m
2026-05-20 THY73 CAN → IST May 20, 07:55 UTCMay 21, 01:55 UTC18h 0m
2026-05-20 THY73 CAN → IST May 20, 05:05 UTCMay 21, 01:55 UTC20h 50m
2026-05-20 THY73 CAN → IST May 20, 04:25 UTCMay 21, 01:55 UTC21h 31m
2026-05-20 THY72 IST → CAN May 20, 03:30 UTCMay 20, 03:40 UTC10m
2026-05-20 THY199 HND → IST May 20, 01:00 UTCMay 20, 01:15 UTC15m
2026-05-19 THY199 HND → IST May 19, 12:55 UTCMay 19, 15:55 UTC3h 0m
2026-05-19 THY198 IST → HND May 19, 01:35 UTCMay 19, 10:45 UTC9h 10m
2026-05-18 THY2NA IST → FCO May 18, 18:40 UTCMay 18, 20:15 UTC1h 35m
2026-05-18 THY3GK IST → FCO May 18, 14:30 UTCMay 18, 16:35 UTC2h 5m
2026-05-18 THY21 PEK → IST May 18, 12:10 UTCMay 18, 12:20 UTC10m
2026-05-18 THY21 PEK → IST May 18, 10:15 UTCMay 18, 11:25 UTC1h 10m
2026-05-18 THY21 PEK → IST May 18, 01:40 UTCMay 18, 02:00 UTC20m
2026-05-17 THY20 IST → ICN May 17, 15:05 UTCMay 17, 23:30 UTC8h 25m
2026-05-17 THY6 ORD → IST May 17, 01:55 UTCMay 17, 11:25 UTC9h 30m
2026-05-16 THY5 IST → ORD May 16, 12:31 UTCMay 16, 23:05 UTC10h 35m
2026-05-15 THY85 MNL → IST May 15, 13:45 UTCMay 15, 20:10 UTC6h 24m
2026-05-15 THY84 IST → MNL May 15, 02:20 UTCMay 15, 11:40 UTC9h 20m
2026-05-14 THY4SD LHR → IST May 14, 19:00 UTCMay 14, 21:50 UTC2h 50m

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 3h ago.
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, THY73.