Apparatus

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sensors Mode-S transponder

4B990C

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-FHL · AIRBUS A-320

Hex
4B990C
Octal
22714414
Decimal
4,954,380
Country
TR
Tail
TC-FHL
Type
A320
No current signal · last broadcast 2h ago
Flights observed
169
Distinct callsigns
20
Country
TR
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4B990C.

Country allocation

The ICAO 24-bit address 4B990C 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
FHY1897 - 8 2026-07-08
FHY770 - 6 2026-07-10
FHY769 - 6 2026-07-10
FHY1898 - 6 2026-07-11
FHY1282 - 5 2026-07-08
FHY1281 - 5 2026-07-08
FHY816 - 4 2026-07-04
FHY1907 Freebird Airlines 4 2026-05-09
FHY946 - 3 2026-04-28
FHY815 - 3 2026-07-03
FHY727 - 3 2026-07-12
FHY1302 Freebird Airlines 3 2026-05-24
FHY1301 Freebird Airlines 3 2026-05-24
FHY9618 - 2 2026-04-13
FHY9616 - 2 2026-05-09
FHY947 - 2 2026-04-29
FHY784 - 2 2026-07-12
FHY783 - 2 2026-07-12
FHY7603 - 2 2026-04-17
FHY754 - 2 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FHY646 BUD → AYT Jul 14, 07:25 UTCJul 14, 09:35 UTC2h 10m
2026-07-14 FHY645 - Jul 14, 03:40 UTCJul 14, 05:55 UTC2h 15m
2026-07-13 FHY1684 BER → AYT Jul 13, 19:05 UTCJul 13, 21:50 UTC2h 45m
2026-07-13 FHY1683 - Jul 13, 14:35 UTCJul 13, 17:40 UTC3h 5m
2026-07-13 FHY728 RIX → AYT Jul 13, 01:55 UTCJul 13, 05:10 UTC3h 15m
2026-07-12 FHY727 - Jul 12, 23:55 UTCJul 13, 00:05 UTC10m
2026-07-12 FHY727 - Jul 12, 20:50 UTCJul 12, 23:20 UTC2h 30m
2026-07-12 FHY784 BTS → AYT Jul 12, 16:50 UTCJul 12, 19:10 UTC2h 20m
2026-07-12 FHY783 - Jul 12, 13:01 UTCJul 12, 15:30 UTC2h 30m
2026-07-11 FHY1898 - Jul 11, 22:15 UTCJul 12, 03:10 UTC4h 55m
2026-07-11 FHY410 CPH → AYT Jul 11, 17:50 UTCJul 11, 21:00 UTC3h 10m
2026-07-11 FHY409 - Jul 11, 12:05 UTCJul 11, 15:35 UTC3h 30m
2026-07-11 FHY1304 MUC → AYT Jul 11, 07:55 UTCJul 11, 10:25 UTC2h 30m
2026-07-11 FHY1303 AYT → MUC Jul 11, 03:10 UTCJul 11, 06:10 UTC3h 0m
2026-07-10 FHY770 - Jul 10, 22:20 UTCJul 11, 00:40 UTC2h 20m
2026-07-10 FHY769 - Jul 10, 18:25 UTCJul 10, 21:00 UTC2h 35m
2026-07-10 FHY1274 - Jul 10, 12:55 UTCJul 10, 15:50 UTC2h 55m
2026-07-10 FHY1273 - Jul 10, 07:35 UTCJul 10, 11:15 UTC3h 40m
2026-07-10 FHY728 - Jul 10, 02:00 UTCJul 10, 05:05 UTC3h 5m
2026-07-09 FHY727 - Jul 9, 21:00 UTCJul 10, 00:15 UTC3h 15m
2026-07-09 FHY214 BRQ → AYT Jul 9, 16:55 UTCJul 9, 19:15 UTC2h 20m
2026-07-09 FHY213 - Jul 9, 13:15 UTCJul 9, 15:55 UTC2h 40m
2026-07-09 FHY1898 - Jul 9, 01:10 UTCJul 9, 02:40 UTC1h 30m
2026-07-08 FHY1897 - Jul 8, 22:05 UTCJul 8, 23:25 UTC1h 20m
2026-07-08 FHY1282 - Jul 8, 17:25 UTCJul 8, 20:10 UTC2h 45m
2026-07-08 FHY1281 AYT → BER Jul 8, 12:40 UTCJul 8, 16:00 UTC3h 20m
2026-07-08 FHY756 - Jul 8, 07:55 UTCJul 8, 10:20 UTC2h 25m
2026-07-08 FHY755 AYT → WAW Jul 8, 03:45 UTCJul 8, 06:35 UTC2h 50m
2026-07-07 FHY770 - Jul 7, 22:50 UTCJul 8, 01:15 UTC2h 25m
2026-07-07 FHY769 - Jul 7, 18:55 UTCJul 7, 21:25 UTC2h 30m
2026-07-07 FHY822 - Jul 7, 07:10 UTCJul 7, 09:00 UTC1h 50m
2026-07-07 FHY821 - Jul 7, 03:45 UTCJul 7, 05:45 UTC2h 0m
2026-07-06 FHY770 - Jul 6, 23:20 UTCJul 7, 01:50 UTC2h 30m
2026-07-06 FHY769 - Jul 6, 18:40 UTCJul 6, 21:10 UTC2h 30m
2026-07-06 FHY1548 - Jul 6, 10:50 UTCJul 6, 13:25 UTC2h 35m
2026-07-06 FHY1547 - Jul 6, 06:35 UTCJul 6, 09:20 UTC2h 45m
2026-07-05 FHY784 BTS → AYT Jul 5, 17:00 UTCJul 5, 19:15 UTC2h 15m
2026-07-05 FHY783 - Jul 5, 13:25 UTCJul 5, 15:50 UTC2h 25m
2026-07-05 FHY752 - Jul 5, 08:20 UTCJul 5, 10:50 UTC2h 30m
2026-07-05 FHY751 - Jul 5, 04:10 UTCJul 5, 06:50 UTC2h 40m
2026-07-04 FHY770 - Jul 4, 22:50 UTCJul 5, 01:05 UTC2h 15m
2026-07-04 FHY769 - Jul 4, 19:00 UTCJul 4, 21:40 UTC2h 40m
2026-07-04 FHY4272 - Jul 4, 13:00 UTCJul 4, 14:30 UTC1h 30m
2026-07-04 FHY4251 - Jul 4, 10:05 UTCJul 4, 11:25 UTC1h 20m
2026-07-04 FHY4250 - Jul 4, 07:05 UTCJul 4, 08:35 UTC1h 30m
2026-07-04 FHY4273 - Jul 4, 04:15 UTCJul 4, 05:45 UTC1h 30m
2026-07-04 FHY816 - Jul 4, 01:25 UTCJul 4, 02:45 UTC1h 20m
2026-07-03 FHY815 - Jul 3, 22:30 UTCJul 3, 23:55 UTC1h 25m
2026-07-03 FHY422 - Jul 3, 11:25 UTCJul 3, 13:05 UTC1h 40m
2026-07-03 FHY421 - Jul 3, 08:45 UTCJul 3, 10:25 UTC1h 40m

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

Mode-S 4B990C frequently asked

What is Mode-S code 4B990C?
4B990C is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-FHL.
Where is Mode-S 4B990C registered?
Mode-S code 4B990C is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B990C broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B990C, octal 22714414, decimal 4,954,380.
What flights does 4B990C operate?
Mode-S 4B990C has broadcast 20 distinct callsigns, including FHY1897, FHY770, FHY769, FHY1898, FHY1282.