Apparatus

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sensors Mode-S transponder

4B990E

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-FHN · AIRBUS A-320

Hex
4B990E
Octal
22714416
Decimal
4,954,382
Country
TR
Tail
TC-FHN
Type
A320
No current signal · last broadcast 1d ago
Flights observed
328
Distinct callsigns
20
Country
TR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4B990E.

Country allocation

The ICAO 24-bit address 4B990E 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
FHY769 - 11 2026-07-01
FHY770 - 10 2026-07-01
FHY732 - 10 2026-07-08
FHY728 - 10 2026-07-03
FHY727 Freebird Airlines 10 2026-07-02
FHY731 - 9 2026-07-07
FHY1548 - 9 2026-07-10
FHY1547 - 9 2026-07-10
FHY754 - 8 2026-07-10
FHY753 - 8 2026-07-10
FHY542 Freebird Airlines 7 2026-05-13
FHY541 - 6 2026-05-13
FHY536 - 5 2026-05-13
FHY535 Freebird Airlines 5 2026-05-13
FHY1898 Freebird Airlines 5 2026-06-30
FHY1897 Freebird Airlines 5 2026-06-29
FHY1304 Freebird Airlines 5 2026-06-07
FHY1303 Freebird Airlines 5 2026-06-07
FHY964 Freebird Airlines 4 2026-06-17
FHY963 Freebird Airlines 4 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 FHY9204 - Jul 12, 12:20 UTCJul 12, 19:10 UTC6h 50m
2026-07-12 FHY808P - Jul 12, 05:55 UTCJul 12, 07:05 UTC1h 10m
2026-07-12 FHY807 - Jul 12, 02:35 UTCJul 12, 04:05 UTC1h 30m
2026-07-12 FHY910P - Jul 12, 00:55 UTCJul 12, 01:25 UTC30m
2026-07-11 FHY9105 - Jul 11, 15:35 UTCJul 11, 22:30 UTC6h 55m
2026-07-11 FHY9013 - Jul 11, 06:15 UTCJul 11, 13:05 UTC6h 50m
2026-07-11 FHY901P - Jul 11, 03:25 UTCJul 11, 03:40 UTC15m
2026-07-10 FHY754 - Jul 10, 23:10 UTCJul 11, 01:20 UTC2h 10m
2026-07-10 FHY753 - Jul 10, 19:20 UTCJul 10, 21:45 UTC2h 26m
2026-07-10 FHY1548 PRG → AYT Jul 10, 15:15 UTCJul 10, 18:00 UTC2h 45m
2026-07-10 FHY1527 - Jul 10, 11:25 UTCJul 10, 14:00 UTC2h 35m
2026-07-10 FHY1528 - Jul 10, 07:15 UTCJul 10, 09:30 UTC2h 15m
2026-07-10 FHY1547 - Jul 10, 03:15 UTCJul 10, 06:05 UTC2h 50m
2026-07-09 FHY850 - Jul 9, 13:00 UTCJul 9, 16:20 UTC3h 20m
2026-07-09 FHY849 - Jul 9, 07:15 UTCJul 9, 11:05 UTC3h 50m
2026-07-09 FHY744 - Jul 9, 01:55 UTCJul 9, 04:55 UTC3h 0m
2026-07-08 FHY743 - Jul 8, 20:45 UTCJul 8, 23:50 UTC3h 5m
2026-07-08 FHY234 - Jul 8, 13:20 UTCJul 8, 15:35 UTC2h 15m
2026-07-08 FHY233 - Jul 8, 09:30 UTCJul 8, 12:05 UTC2h 35m
2026-07-08 FHY732 TLL → AYT Jul 8, 01:45 UTCJul 8, 05:30 UTC3h 45m
2026-07-07 FHY731 - Jul 7, 20:40 UTCJul 8, 00:20 UTC3h 40m
2026-07-07 FHY784 BTS → AYT Jul 7, 09:20 UTCJul 7, 11:30 UTC2h 10m
2026-07-07 FHY783 - Jul 7, 05:40 UTCJul 7, 08:05 UTC2h 25m
2026-07-06 FHY754 KRK → AYT Jul 6, 23:15 UTCJul 7, 01:30 UTC2h 15m
2026-07-06 FHY753 AYT → KRK Jul 6, 19:55 UTCJul 6, 22:20 UTC2h 25m
2026-07-06 FHY1282 - Jul 6, 09:55 UTCJul 6, 12:45 UTC2h 50m
2026-07-06 FHY1281 - Jul 6, 05:35 UTCJul 6, 08:45 UTC3h 10m
2026-07-05 FHY214 BRQ → AYT Jul 5, 18:30 UTCJul 5, 20:50 UTC2h 20m
2026-07-05 FHY213 - Jul 5, 14:40 UTCJul 5, 17:10 UTC2h 30m
2026-07-05 FHY1252 HAJ → AYT Jul 5, 01:50 UTCJul 5, 04:50 UTC3h 0m
2026-07-04 FHY1251 - Jul 4, 21:00 UTCJul 5, 00:25 UTC3h 25m
2026-07-04 FHY1251 AYT → AYT Jul 4, 20:45 UTCJul 4, 20:50 UTC5m
2026-07-04 FHY646 BUD → AYT Jul 4, 17:00 UTCJul 4, 19:05 UTC2h 5m
2026-07-04 FHY645 - Jul 4, 13:30 UTCJul 4, 15:50 UTC2h 20m
2026-07-04 FHY1256 HAJ → AYT Jul 4, 08:30 UTCJul 4, 11:30 UTC3h 0m
2026-07-04 FHY1255 - Jul 4, 03:35 UTCJul 4, 07:05 UTC3h 30m
2026-07-03 FHY754 - Jul 3, 23:10 UTCJul 4, 01:25 UTC2h 15m
2026-07-03 FHY753 - Jul 3, 19:05 UTCJul 3, 21:30 UTC2h 25m
2026-07-03 FHY1274 HAM → AYT Jul 3, 12:55 UTCJul 3, 15:55 UTC3h 0m
2026-07-03 FHY1273 - Jul 3, 07:30 UTCJul 3, 11:05 UTC3h 35m
2026-07-03 FHY728 - Jul 3, 02:00 UTCJul 3, 05:20 UTC3h 20m
2026-07-02 FHY727 AYT → AMS Jul 2, 20:45 UTCJul 3, 00:05 UTC3h 20m
2026-07-02 FHY850 ARN → AYT Jul 2, 12:45 UTCJul 2, 16:20 UTC3h 35m
2026-07-02 FHY849 AYT → ARN Jul 2, 07:40 UTCJul 2, 11:25 UTC3h 45m
2026-07-01 FHY770 - Jul 1, 23:15 UTCJul 2, 01:40 UTC2h 25m
2026-07-01 FHY769 - Jul 1, 19:10 UTCJul 1, 21:35 UTC2h 25m
2026-07-01 FHY756 - Jul 1, 08:05 UTCJul 1, 10:40 UTC2h 35m
2026-07-01 FHY755 - Jul 1, 03:40 UTCJul 1, 06:05 UTC2h 25m
2026-06-30 FHY770 - Jun 30, 23:20 UTCJul 1, 01:50 UTC2h 30m
2026-06-30 FHY769 - Jun 30, 19:00 UTCJun 30, 21:25 UTC2h 25m

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

Mode-S 4B990E frequently asked

What is Mode-S code 4B990E?
4B990E is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-FHN.
Where is Mode-S 4B990E registered?
Mode-S code 4B990E is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B990E broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B990E, octal 22714416, decimal 4,954,382.
What flights does 4B990E operate?
Mode-S 4B990E has broadcast 20 distinct callsigns, including FHY769, FHY770, FHY732, FHY728, FHY727.