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sensors Mode-S transponder

4BA955

ICAO 24-bit transponder address · allocated to Turkey

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

Hex
4BA955
Octal
22724525
Decimal
4,958,549
Country
TR
Tail
TC-JJU
Type
B77W
Broadcasting now · callsign THY3MJ · 37,000 ft
Flights observed
271
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 20:10 UTC

Current position

4BA955 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4BA955 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
THY71 Turkish Airlines 21 2026-07-26
THY70 Turkish Airlines 15 2026-07-26
THY10 Turkish Airlines 10 2026-06-02
THY73 - 9 2026-07-12
THY4 Turkish Airlines 9 2026-07-24
THY88 Turkish Airlines 8 2026-07-05
THY3 Turkish Airlines 8 2026-07-24
THY27 Turkish Airlines 8 2026-07-01
THY9 Turkish Airlines 7 2026-06-01
THY85 - 7 2026-07-15
THY84 - 7 2026-07-14
THY89 Turkish Airlines 6 2026-07-05
THY26 - 6 2026-06-29
THY72 - 5 2026-07-12
THY3AX - 5 2026-07-07
THY2XQ - 5 2026-07-07
THY21 - 5 2026-07-04
THY1 Turkish Airlines 5 2026-04-16
THY80E - 4 2026-07-04
THY55 - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 THY71 HKG → IST Jul 26, 15:55 UTCJul 26, 20:10 UTC4h 15m
2026-07-26 THY71 HKG → IST Jul 26, 14:55 UTCJul 26, 15:05 UTC10m
2026-07-26 THY70 IST → HKG Jul 26, 08:35 UTCJul 26, 08:50 UTC15m
2026-07-25 THY70 IST → HKG Jul 25, 22:50 UTCJul 26, 06:30 UTC7h 40m
2026-07-25 THY3RU CMN → IST Jul 25, 16:25 UTCJul 25, 20:10 UTC3h 45m
2026-07-25 THY5RM IST → CMN Jul 25, 10:00 UTCJul 25, 14:10 UTC4h 10m
2026-07-24 THY4 JFK → IST Jul 24, 17:20 UTCJul 25, 02:00 UTC8h 40m
2026-07-24 THY3 IST → JFK Jul 24, 05:00 UTCJul 24, 14:55 UTC9h 55m
2026-07-23 THY4 JFK → IST Jul 23, 17:15 UTCJul 24, 01:35 UTC8h 20m
2026-07-23 THY3 IST → JFK Jul 23, 04:40 UTCJul 23, 14:20 UTC9h 40m
2026-07-23 THY71 HKG → IST Jul 23, 01:05 UTCJul 23, 01:20 UTC15m
2026-07-22 THY71 HKG → IST Jul 22, 15:45 UTCJul 23, 00:20 UTC8h 35m
2026-07-22 THY71 HKG → IST Jul 22, 15:00 UTCJul 22, 15:10 UTC10m
2026-07-22 THY70 - Jul 22, 00:15 UTCJul 22, 05:25 UTC5h 10m
2026-07-21 THY70 - Jul 21, 22:55 UTCJul 21, 23:25 UTC30m
2026-07-21 THY7ER BJV → IST Jul 21, 18:00 UTCJul 21, 18:55 UTC55m
2026-07-21 THY1FC LUX → IST Jul 21, 15:10 UTCJul 21, 16:00 UTC50m
2026-07-21 THY8LV YYZ → IST Jul 21, 03:20 UTCJul 21, 12:20 UTC9h 0m
2026-07-20 THY1GJ - Jul 20, 15:05 UTCJul 21, 01:00 UTC9h 55m
2026-07-20 THY6 ORD → IST Jul 20, 02:10 UTCJul 20, 11:55 UTC9h 45m
2026-07-19 THY5 - Jul 19, 12:30 UTCJul 19, 23:10 UTC10h 40m
2026-07-19 THY66C - Jul 19, 08:15 UTCJul 19, 09:10 UTC55m
2026-07-19 THY5AB - Jul 19, 05:50 UTCJul 19, 06:40 UTC50m
2026-07-18 THY71 - Jul 18, 16:35 UTCJul 18, 20:35 UTC4h 0m
2026-07-18 THY71 - Jul 18, 15:20 UTCJul 18, 15:35 UTC15m
2026-07-18 THY70 - Jul 18, 08:45 UTCJul 18, 09:05 UTC20m
2026-07-18 THY70 - Jul 18, 00:10 UTCJul 18, 06:40 UTC6h 31m
2026-07-17 THY70 - Jul 17, 23:05 UTCJul 17, 23:30 UTC25m
2026-07-17 THY76Y - Jul 17, 03:30 UTCJul 17, 14:39 UTC11h 10m
2026-07-16 THY75D - Jul 16, 12:34 UTCJul 17, 00:25 UTC11h 50m
2026-07-15 THY85 - Jul 15, 13:50 UTCJul 16, 01:00 UTC11h 10m
2026-07-14 THY84 - Jul 14, 23:40 UTCJul 15, 11:00 UTC11h 20m
2026-07-14 THY2AY - Jul 14, 02:50 UTCJul 14, 14:35 UTC11h 45m
2026-07-13 THY5KM - Jul 13, 12:15 UTCJul 14, 00:30 UTC12h 15m
2026-07-13 THY6KL - Jul 13, 08:10 UTCJul 13, 09:05 UTC55m
2026-07-13 THY8FW - Jul 13, 04:50 UTCJul 13, 05:50 UTC1h 0m
2026-07-12 THY73 - Jul 12, 17:20 UTCJul 13, 00:50 UTC7h 30m
2026-07-12 THY72 - Jul 12, 00:05 UTCJul 12, 05:55 UTC5h 50m
2026-07-11 THY72 - Jul 11, 22:40 UTCJul 11, 23:10 UTC30m
2026-07-11 THY1896 - Jul 11, 13:45 UTCJul 11, 15:55 UTC2h 10m
2026-07-11 THY2HG - Jul 11, 09:10 UTCJul 11, 11:25 UTC2h 15m
2026-07-10 THY76Y - Jul 10, 07:40 UTCJul 10, 18:15 UTC10h 35m
2026-07-09 THY75D - Jul 9, 12:45 UTCJul 10, 00:40 UTC11h 55m
2026-07-09 THY4YL - Jul 9, 08:25 UTCJul 9, 09:00 UTC35m
2026-07-09 THY3UZ - Jul 9, 05:35 UTCJul 9, 05:55 UTC20m
2026-07-09 THY55 - Jul 9, 02:30 UTCJul 9, 02:40 UTC10m
2026-07-08 THY55 - Jul 8, 16:15 UTCJul 9, 01:50 UTC9h 35m
2026-07-07 THY54 - Jul 7, 23:15 UTCJul 8, 09:20 UTC10h 5m
2026-07-07 THY3AX - Jul 7, 19:20 UTCJul 7, 20:10 UTC50m
2026-07-07 THY2XQ - Jul 7, 16:25 UTCJul 7, 17:25 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-JJU page for operator, model, and routing details .

Mode-S 4BA955 frequently asked

What is Mode-S code 4BA955?
4BA955 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JJU.
Where is Mode-S 4BA955 registered?
Mode-S code 4BA955 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BA955 broadcasting right now?
Yes. Mode-S 4BA955 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BA955, octal 22724525, decimal 4,958,549.
What flights does 4BA955 operate?
Mode-S 4BA955 has broadcast 20 distinct callsigns, including THY71, THY70, THY10, THY73, THY4.