Apparatus

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sensors Mode-S transponder

4B990D

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-FHM · AIRBUS A-320

Hex
4B990D
Octal
22714415
Decimal
4,954,381
Country
TR
Tail
TC-FHM
Type
A320
Broadcasting now · callsign FHY1411 · 34,000 ft
Flights observed
88
Distinct callsigns
20
Country
TR
Last broadcast
32m ago

Current position

4B990D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4B990D 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
FHY1905 - 7 2026-04-16
FHY728 Freebird Airlines 3 2026-05-16
FHY727 Freebird Airlines 3 2026-05-15
FHY1372 - 3 2026-04-13
FHY964 Freebird Airlines 2 2026-05-06
FHY770 Freebird Airlines 2 2026-05-05
FHY769 - 2 2026-05-05
FHY754 - 2 2026-05-29
FHY753 Freebird Airlines 2 2026-05-29
FHY752 - 2 2026-05-18
FHY751 Freebird Airlines 2 2026-05-18
FHY731 Freebird Airlines 2 2026-05-26
FHY1552 - 2 2026-05-16
FHY1551 - 2 2026-05-16
FHY1411 Freebird Airlines 2 2026-05-30
FHY1366 Freebird Airlines 2 2026-05-23
FHY1365 Freebird Airlines 2 2026-05-23
FHY1362 Freebird Airlines 2 2026-05-01
FHY1361 Freebird Airlines 2 2026-05-01
FHY1322 Freebird Airlines 2 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 FHY1411 AYT → FDH May 30, 04:35 UTCMay 30, 05:15 UTC40m
2026-05-29 FHY754 - May 29, 22:55 UTCMay 30, 01:00 UTC2h 5m
2026-05-29 FHY753 AYT → BZG May 29, 19:10 UTCMay 29, 21:50 UTC2h 40m
2026-05-28 FHY1304 MUC → AYT May 28, 08:20 UTCMay 28, 11:00 UTC2h 40m
2026-05-28 FHY1303 AYT → MUC May 28, 03:40 UTCMay 28, 06:35 UTC2h 55m
2026-05-26 FHY731 LEJ → DTM May 26, 20:50 UTCMay 27, 05:19 UTC8h 30m
2026-05-26 FHY694 PLQ → AYT May 26, 11:54 UTCMay 26, 15:05 UTC3h 10m
2026-05-26 FHY693 - May 26, 07:29 UTCMay 26, 10:50 UTC3h 20m
2026-05-26 FHY802 - May 26, 03:55 UTCMay 26, 05:15 UTC1h 20m
2026-05-26 FHY801 - May 26, 01:24 UTCMay 26, 02:24 UTC1h 0m
2026-05-25 FHY801P - May 25, 23:10 UTCMay 25, 23:30 UTC20m
2026-05-25 FHY1322 STR → AYT May 25, 13:35 UTCMay 25, 16:45 UTC3h 10m
2026-05-25 FHY1321 AYT → STR May 25, 09:15 UTCMay 25, 12:20 UTC3h 5m
2026-05-25 FHY1256 HAJ → AYT May 25, 01:55 UTCMay 25, 04:10 UTC2h 15m
2026-05-24 FHY1255 AYT → HAJ May 24, 19:45 UTCMay 24, 21:50 UTC2h 5m
2026-05-24 FHY1322 STR → AYT May 24, 10:10 UTCMay 24, 13:15 UTC3h 5m
2026-05-24 FHY1321 AYT → STR May 24, 04:40 UTCMay 24, 07:45 UTC3h 5m
2026-05-23 FHY1366 CGN → AYT May 23, 23:45 UTCMay 24, 03:15 UTC3h 30m
2026-05-23 FHY1365 AYT → CGN May 23, 19:00 UTCMay 23, 22:20 UTC3h 20m
2026-05-23 FHY1194 DUS → AYT May 23, 10:30 UTCMay 23, 13:35 UTC3h 5m
2026-05-23 FHY1193 AYT → DUS May 23, 05:40 UTCMay 23, 09:00 UTC3h 20m
2026-05-23 FHY1258 HAJ → AYT May 23, 00:55 UTCMay 23, 04:10 UTC3h 14m
2026-05-22 FHY1257 AYT → HAJ May 22, 20:20 UTCMay 22, 23:40 UTC3h 20m
2026-05-22 FHY1026 STR → AYT May 22, 15:30 UTCMay 22, 18:35 UTC3h 5m
2026-05-22 FHY1025 AYT → STR May 22, 11:05 UTCMay 22, 14:15 UTC3h 10m
2026-05-22 FHY764 GDN → AYT May 22, 07:05 UTCMay 22, 09:20 UTC2h 15m
2026-05-22 FHY763 AYT → RZE May 22, 03:15 UTCMay 22, 05:35 UTC2h 20m
2026-05-21 FHY1898 RMO → AYT May 21, 05:20 UTCMay 21, 05:35 UTC15m
2026-05-20 FHY1897 AYT → RMO May 20, 22:10 UTCMay 21, 04:45 UTC6h 35m
2026-05-20 FHY754 - May 20, 08:05 UTCMay 20, 10:20 UTC2h 15m
2026-05-20 FHY753 AYT → BZG May 20, 04:00 UTCMay 20, 06:20 UTC2h 21m
2026-05-19 FHY325 - May 19, 18:40 UTCMay 19, 23:25 UTC4h 45m
2026-05-18 FHY752 - May 18, 07:45 UTCMay 18, 10:15 UTC2h 30m
2026-05-18 FHY751 AYT → VIE May 18, 03:45 UTCMay 18, 06:10 UTC2h 25m
2026-05-16 FHY561 AYT → AYT May 16, 22:05 UTCMay 17, 02:40 UTC4h 35m
2026-05-16 FHY1552 PRG → AYT May 16, 18:10 UTCMay 16, 20:45 UTC2h 35m
2026-05-16 FHY1551 AYT → PRG May 16, 13:35 UTCMay 16, 16:35 UTC3h 0m
2026-05-16 FHY728 RIX → AYT May 16, 01:55 UTCMay 16, 05:20 UTC3h 25m
2026-05-15 FHY727 AYT → AMS May 15, 20:50 UTCMay 16, 00:10 UTC3h 20m
2026-05-15 FHY1274 HAM → AYT May 15, 12:45 UTCMay 15, 15:50 UTC3h 4m
2026-05-15 FHY1273 AYT → HAM May 15, 07:30 UTCMay 15, 10:50 UTC3h 20m
2026-05-06 FHY964 DLM → TLV May 6, 04:15 UTCMay 6, 07:25 UTC3h 10m
2026-05-05 FHY963 ESB → ESB May 5, 23:45 UTCMay 6, 03:05 UTC3h 20m
2026-05-05 FHY770 KTW → AYT May 5, 10:55 UTCMay 5, 13:15 UTC2h 20m
2026-05-05 FHY769 - May 5, 07:00 UTCMay 5, 09:35 UTC2h 35m
2026-05-05 FHY732 - May 5, 01:35 UTCMay 5, 05:05 UTC3h 30m
2026-05-04 FHY731 LEJ → DTM May 4, 20:40 UTCMay 5, 00:25 UTC3h 45m
2026-05-04 FHY752 - May 4, 08:15 UTCMay 4, 10:50 UTC2h 35m
2026-05-04 FHY751 AYT → VIE May 4, 03:35 UTCMay 4, 06:15 UTC2h 40m
2026-05-03 FHY770 KTW → AYT May 3, 11:00 UTCMay 3, 13:15 UTC2h 15m

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

Mode-S 4B990D frequently asked

What is Mode-S code 4B990D?
4B990D is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-FHM.
Where is Mode-S 4B990D registered?
Mode-S code 4B990D is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B990D broadcasting right now?
Yes. Mode-S 4B990D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B990D, octal 22714415, decimal 4,954,381.
What flights does 4B990D operate?
Mode-S 4B990D has broadcast 20 distinct callsigns, including FHY1905, FHY728, FHY727, FHY1372, FHY964.