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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
Broadcasting now · callsign FHY821 · 32,000 ft
Flights observed
382
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 21:30 UTC

Current position

4B990E is currently broadcasting. Map zoomed to live position.

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 - 13 2026-07-23
FHY770 Freebird Airlines 12 2026-07-23
FHY1548 - 11 2026-07-26
FHY1547 - 11 2026-07-26
FHY754 - 10 2026-07-20
FHY753 - 10 2026-07-20
FHY732 - 10 2026-07-08
FHY728 - 10 2026-07-03
FHY727 Freebird Airlines 10 2026-07-02
FHY731 - 9 2026-07-07
FHY542 Freebird Airlines 7 2026-05-13
FHY1898 Freebird Airlines 7 2026-07-22
FHY1897 Freebird Airlines 7 2026-07-21
FHY743 - 6 2026-07-16
FHY541 - 6 2026-05-13
FHY1304 Freebird Airlines 6 2026-07-18
FHY1303 Freebird Airlines 6 2026-07-18
FHY744 Freebird Airlines 5 2026-07-17
FHY536 - 5 2026-05-13
FHY535 Freebird Airlines 5 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FHY809P - Jul 26, 21:05 UTCJul 26, 21:30 UTC25m
2026-07-26 FHY1552 - Jul 26, 15:45 UTCJul 26, 18:25 UTC2h 40m
2026-07-26 FHY1551 - Jul 26, 11:25 UTCJul 26, 14:20 UTC2h 55m
2026-07-26 FHY1548 - Jul 26, 07:25 UTCJul 26, 09:55 UTC2h 30m
2026-07-26 FHY1547 - Jul 26, 03:20 UTCJul 26, 06:10 UTC2h 50m
2026-07-25 FHY1366 CGN → AYT Jul 25, 23:05 UTCJul 26, 02:10 UTC3h 5m
2026-07-25 FHY1365 AYT → CGN Jul 25, 18:10 UTCJul 25, 21:30 UTC3h 20m
2026-07-25 FHY1322 STR → AYT Jul 25, 10:50 UTCJul 25, 14:20 UTC3h 30m
2026-07-25 FHY1321 AYT → STR Jul 25, 06:30 UTCJul 25, 09:35 UTC3h 5m
2026-07-25 FHY1258 HAJ → AYT Jul 25, 01:20 UTCJul 25, 04:25 UTC3h 5m
2026-07-24 FHY1257 AYT → HAJ Jul 24, 20:40 UTCJul 24, 23:55 UTC3h 15m
2026-07-24 FHY1548 - Jul 24, 15:15 UTCJul 24, 17:50 UTC2h 35m
2026-07-24 FHY1527 - Jul 24, 11:35 UTCJul 24, 14:05 UTC2h 30m
2026-07-24 FHY1528 - Jul 24, 07:30 UTCJul 24, 09:45 UTC2h 15m
2026-07-24 FHY1547 - Jul 24, 03:20 UTCJul 24, 06:00 UTC2h 40m
2026-07-23 FHY770 KTW → AYT Jul 23, 23:20 UTCJul 24, 01:45 UTC2h 25m
2026-07-23 FHY769 - Jul 23, 18:55 UTCJul 23, 21:25 UTC2h 30m
2026-07-23 FHY850 HEL → AYT Jul 23, 12:30 UTCJul 23, 16:00 UTC3h 30m
2026-07-23 FHY849 - Jul 23, 07:10 UTCJul 23, 10:55 UTC3h 45m
2026-07-22 FHY770 KTW → AYT Jul 22, 22:50 UTCJul 23, 01:10 UTC2h 20m
2026-07-22 FHY769 - Jul 22, 19:00 UTCJul 22, 21:25 UTC2h 25m
2026-07-22 FHY1898 RMO → AYT Jul 22, 01:55 UTCJul 22, 02:50 UTC55m
2026-07-21 FHY1897 AYT → RMO Jul 21, 22:15 UTCJul 21, 23:35 UTC1h 20m
2026-07-21 FHY822 - Jul 21, 07:15 UTCJul 21, 09:05 UTC1h 50m
2026-07-21 FHY821 - Jul 21, 03:50 UTCJul 21, 05:55 UTC2h 5m
2026-07-20 FHY754 KRK → AYT Jul 20, 23:05 UTCJul 21, 01:30 UTC2h 24m
2026-07-20 FHY753 - Jul 20, 19:20 UTCJul 20, 21:50 UTC2h 30m
2026-07-20 FHY222 OSL → AYT Jul 20, 12:55 UTCJul 20, 17:00 UTC4h 5m
2026-07-20 FHY221 - Jul 20, 07:35 UTCJul 20, 11:30 UTC3h 55m
2026-07-20 FHY1688 PAD → AYT Jul 20, 01:00 UTCJul 20, 04:05 UTC3h 5m
2026-07-19 FHY1687 AYT → PAD Jul 19, 20:10 UTCJul 19, 23:30 UTC3h 20m
2026-07-19 FHY1552 PRG → AYT Jul 19, 16:15 UTCJul 19, 19:00 UTC2h 45m
2026-07-19 FHY1551 - Jul 19, 12:05 UTCJul 19, 14:55 UTC2h 50m
2026-07-19 FHY1898 RMO → AYT Jul 19, 01:50 UTCJul 19, 02:55 UTC1h 5m
2026-07-18 FHY1897 AYT → RMO Jul 18, 22:10 UTCJul 18, 23:30 UTC1h 20m
2026-07-18 FHY410 - Jul 18, 17:00 UTCJul 18, 20:10 UTC3h 10m
2026-07-18 FHY409 AYT → CPH Jul 18, 12:00 UTCJul 18, 15:25 UTC3h 25m
2026-07-18 FHY1304 MUC → AYT Jul 18, 07:40 UTCJul 18, 10:15 UTC2h 35m
2026-07-18 FHY1303 AYT → MUC Jul 18, 03:10 UTCJul 18, 06:10 UTC3h 0m
2026-07-17 FHY754 - Jul 17, 23:05 UTCJul 18, 01:20 UTC2h 15m
2026-07-17 FHY753 - Jul 17, 19:09 UTCJul 17, 21:39 UTC2h 30m
2026-07-17 FHY1274 HAM → AYT Jul 17, 12:30 UTCJul 17, 15:35 UTC3h 5m
2026-07-17 FHY1273 AYT → HAM Jul 17, 07:35 UTCJul 17, 11:00 UTC3h 25m
2026-07-17 FHY744 KUN → AYT Jul 17, 02:10 UTCJul 17, 05:20 UTC3h 10m
2026-07-16 FHY743 - Jul 16, 23:55 UTCJul 17, 00:04 UTC10m
2026-07-16 FHY743 - Jul 16, 20:49 UTCJul 16, 23:20 UTC2h 30m
2026-07-16 FHY850 ARN → AYT Jul 16, 12:44 UTCJul 16, 16:19 UTC3h 35m
2026-07-16 FHY849 - Jul 16, 07:20 UTCJul 16, 11:05 UTC3h 45m
2026-07-16 FHY1258 HAJ → AYT Jul 16, 01:15 UTCJul 16, 04:25 UTC3h 10m
2026-07-15 FHY1257 - Jul 15, 20:25 UTCJul 15, 23:55 UTC3h 30m

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?
Yes. Mode-S 4B990E is currently airborne.
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, FHY1548, FHY1547, FHY754.