Apparatus

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sensors Mode-S transponder

34554F

ICAO 24-bit transponder address · allocated to Spain

Currently assigned to EC-HOM · PIPER PA-28-140/150/160/180

Hex
34554F
Octal
15052517
Decimal
3,429,711
Country
ES
Tail
EC-HOM
Type
P28A
No current signal · last broadcast 12d ago
Flights observed
142
Distinct callsigns
20
Country
ES
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S 34554F.

Country allocation

The ICAO 24-bit address 34554F falls within the block assigned to Spain (ES) by ICAO Annex 10, Volume III. Every aircraft registered in Spain 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
FSMK1K - 12 2026-07-07
FSMK1N - 11 2026-07-06
FSMK1L - 9 2026-07-05
FSMK1U - 7 2026-07-08
FSMK1G - 7 2026-07-01
FSMK2L - 6 2026-06-28
FSMK2G - 5 2026-07-01
FSMK1X - 5 2026-06-19
FSMK3U - 4 2026-07-08
FSMK2X - 4 2026-06-25
FSMK1Y - 4 2026-07-02
FSMK1E - 4 2026-07-03
FSMK2Y - 3 2026-05-27
FSMK2K - 3 2026-05-21
FSMK1W - 3 2026-06-18
FSMK1F - 3 2026-06-05
FSMK1C - 3 2026-06-17
FSMK3X - 2 2026-06-19
FSMK3R - 2 2026-05-25
FSMK2R - 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-08 FSMK3U - Jul 8, 10:45 UTCJul 8, 11:55 UTC1h 10m
2026-07-08 FSMK2S - Jul 8, 09:15 UTCJul 8, 09:30 UTC15m
2026-07-08 FSMK1U - Jul 8, 08:25 UTCJul 8, 08:45 UTC20m
2026-07-07 FSMK1K - Jul 7, 12:40 UTCJul 7, 13:15 UTC35m
2026-07-07 FSMK1K - Jul 7, 11:40 UTCJul 7, 11:55 UTC15m
2026-07-06 FSMK1N - Jul 6, 21:05 UTCJul 6, 21:35 UTC30m
2026-07-06 FSMK1N - Jul 6, 19:40 UTCJul 6, 20:15 UTC35m
2026-07-05 FSMK1L - Jul 5, 11:45 UTCJul 5, 12:40 UTC55m
2026-07-05 FSMK1L - Jul 5, 10:55 UTCJul 5, 11:10 UTC15m
2026-07-04 FSMK1N - Jul 4, 19:30 UTCJul 4, 21:40 UTC2h 10m
2026-07-04 FSMK1K - Jul 4, 12:40 UTCJul 4, 13:05 UTC25m
2026-07-04 FSMK1K - Jul 4, 11:45 UTCJul 4, 12:00 UTC15m
2026-07-03 FSMK1N - Jul 3, 20:05 UTCJul 3, 21:50 UTC1h 45m
2026-07-03 FSMK1N - Jul 3, 18:45 UTCJul 3, 19:20 UTC35m
2026-07-03 FSMK1E - Jul 3, 10:45 UTCJul 3, 12:25 UTC1h 40m
2026-07-02 FSMK1N - Jul 2, 19:25 UTCJul 2, 21:45 UTC2h 20m
2026-07-02 FSMK1Y - Jul 2, 07:40 UTCJul 2, 09:45 UTC2h 5m
2026-07-01 FSMK4E - Jul 1, 16:40 UTCJul 1, 17:35 UTC55m
2026-07-01 FSMK3E - Jul 1, 13:35 UTCJul 1, 15:15 UTC1h 40m
2026-07-01 FSMK2G - Jul 1, 12:15 UTCJul 1, 12:40 UTC25m
2026-07-01 FSMK1G - Jul 1, 09:25 UTCJul 1, 10:10 UTC45m
2026-06-30 FSMK4I - Jun 30, 17:25 UTCJun 30, 19:15 UTC1h 50m
2026-06-30 FSMK3I - Jun 30, 14:20 UTCJun 30, 16:25 UTC2h 5m
2026-06-30 FSMK2G - Jun 30, 11:40 UTCJun 30, 12:00 UTC20m
2026-06-30 FSMK1G - Jun 30, 09:30 UTCJun 30, 09:45 UTC15m
2026-06-30 FSMK1G - Jun 30, 08:10 UTCJun 30, 08:40 UTC30m
2026-06-29 FSMK3G - Jun 29, 13:34 UTCJun 29, 14:25 UTC50m
2026-06-29 FSMK2G - Jun 29, 10:10 UTCJun 29, 11:04 UTC55m
2026-06-29 FSMK1G - Jun 29, 07:44 UTCJun 29, 08:14 UTC30m
2026-06-28 FSMK2L - Jun 28, 13:34 UTCJun 28, 15:09 UTC1h 35m
2026-06-28 FSMK1K - Jun 28, 10:55 UTCJun 28, 12:50 UTC1h 55m
2026-06-26 FSMK1K - Jun 26, 12:14 UTCJun 26, 12:24 UTC10m
2026-06-25 FSMK2X - Jun 25, 09:50 UTCJun 25, 10:04 UTC15m
2026-06-25 FSMK1U - Jun 25, 07:39 UTCJun 25, 08:45 UTC1h 5m
2026-06-19 FSMK3X - Jun 19, 11:54 UTCJun 19, 12:54 UTC1h 0m
2026-06-19 FSMK2X - Jun 19, 09:44 UTCJun 19, 10:29 UTC45m
2026-06-19 FSMK1X - Jun 19, 07:14 UTCJun 19, 08:29 UTC1h 15m
2026-06-18 FSMK1W - Jun 18, 16:35 UTCJun 18, 17:00 UTC25m
2026-06-18 FSMK1W - Jun 18, 15:30 UTCJun 18, 15:50 UTC20m
2026-06-18 FSMK1W - Jun 18, 14:25 UTCJun 18, 15:00 UTC35m
2026-06-17 FSMK1C - Jun 17, 10:00 UTCJun 17, 13:15 UTC3h 15m
2026-06-17 FSMK1A - Jun 17, 08:45 UTCJun 17, 09:30 UTC45m
2026-06-16 FSMK1K - Jun 16, 12:05 UTCJun 16, 13:44 UTC1h 40m
2026-06-15 FSMK1N - Jun 15, 17:54 UTCJun 15, 19:30 UTC1h 35m
2026-06-15 FSMK2C - Jun 15, 14:24 UTCJun 15, 14:34 UTC10m
2026-06-15 FSMK1C - Jun 15, 12:55 UTCJun 15, 13:40 UTC45m
2026-06-11 FSMK2X - Jun 11, 13:35 UTCJun 11, 14:30 UTC55m
2026-06-11 FSMK1O - Jun 11, 10:50 UTCJun 11, 12:00 UTC1h 10m
2026-06-10 FSMK2E - Jun 10, 11:40 UTCJun 10, 12:00 UTC20m
2026-06-10 FSMK1E - Jun 10, 08:10 UTCJun 10, 08:55 UTC45m

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 EC-HOM page for operator, model, and routing details .

Mode-S 34554F frequently asked

What is Mode-S code 34554F?
34554F is an ICAO 24-bit transponder address. Allocated to Spain. Assigned to EC-HOM.
Where is Mode-S 34554F registered?
Mode-S code 34554F is allocated to Spain (ES). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 34554F broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 34554F, octal 15052517, decimal 3,429,711.
What flights does 34554F operate?
Mode-S 34554F has broadcast 20 distinct callsigns, including FSMK1K, FSMK1N, FSMK1L, FSMK1U, FSMK1G.