Apparatus

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sensors Mode-S transponder

3451D6

ICAO 24-bit transponder address · allocated to Spain

Currently assigned to EC-MKE · ATR-72-500

Hex
3451D6
Octal
15050726
Decimal
3,428,822
Country
ES
Tail
EC-MKE
Type
AT75
No current signal · last broadcast 5h ago
Flights observed
135
Distinct callsigns
10
Country
ES
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S 3451D6.

Country allocation

The ICAO 24-bit address 3451D6 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 10 distinct

Callsign Airline Flights Last seen
SWT1CW - 34 2026-07-13
SWT2CW - 33 2026-07-13
SWT1SO - 26 2026-07-14
SWT2SO - 25 2026-07-08
SWT38U Swiftair 5 2026-05-08
SWT41C Swiftair 3 2026-05-08
SWT2KR Swiftair 3 2026-05-08
SWT2RP Swiftair 2 2026-05-29
SWT1RP Swiftair 2 2026-05-29
SWT1KR Swiftair 2 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWT1SO - Jul 14, 02:45 UTCJul 14, 05:45 UTC3h 0m
2026-07-13 SWT2CW WRO → CGN Jul 13, 21:15 UTCJul 13, 23:15 UTC2h 0m
2026-07-13 SWT1CW CGN → WRO Jul 13, 03:45 UTCJul 13, 05:25 UTC1h 40m
2026-07-10 SWT2CW WRO → CGN Jul 10, 20:45 UTCJul 10, 22:25 UTC1h 40m
2026-07-10 SWT1CW CGN → WRO Jul 10, 02:30 UTCJul 10, 04:05 UTC1h 35m
2026-07-09 SWT2CW WRO → CGN Jul 9, 20:40 UTCJul 9, 22:30 UTC1h 50m
2026-07-09 SWT1CW CGN → WRO Jul 9, 02:35 UTCJul 9, 04:15 UTC1h 40m
2026-07-08 SWT2SO SOF → CGN Jul 8, 18:00 UTCJul 8, 21:50 UTC3h 50m
2026-07-08 SWT1SO CGN → SOF Jul 8, 03:00 UTCJul 8, 06:05 UTC3h 5m
2026-07-07 SWT2CW WRO → CGN Jul 7, 20:45 UTCJul 7, 23:05 UTC2h 20m
2026-07-07 SWT1CW CGN → WRO Jul 7, 02:25 UTCJul 7, 03:55 UTC1h 30m
2026-07-06 SWT2SO SOF → CGN Jul 6, 17:40 UTCJul 6, 21:20 UTC3h 40m
2026-07-06 SWT1SO CGN → SOF Jul 6, 02:30 UTCJul 6, 05:40 UTC3h 10m
2026-07-03 SWT2CW WRO → CGN Jul 3, 20:40 UTCJul 3, 22:30 UTC1h 50m
2026-07-03 SWT1CW CGN → WRO Jul 3, 02:25 UTCJul 3, 03:55 UTC1h 30m
2026-07-02 SWT2CW WRO → CGN Jul 2, 21:05 UTCJul 2, 23:05 UTC2h 0m
2026-07-02 SWT1CW CGN → WRO Jul 2, 02:35 UTCJul 2, 04:10 UTC1h 35m
2026-07-01 SWT2CW WRO → CGN Jul 1, 20:50 UTCJul 1, 22:35 UTC1h 45m
2026-07-01 SWT1CW CGN → WRO Jul 1, 02:40 UTCJul 1, 04:15 UTC1h 35m
2026-06-30 SWT2SO - Jun 30, 18:00 UTCJun 30, 21:25 UTC3h 25m
2026-06-30 SWT1SO CGN → SOF Jun 30, 02:55 UTCJun 30, 06:35 UTC3h 40m
2026-06-29 SWT2SO SOF → CGN Jun 29, 18:05 UTCJun 29, 21:24 UTC3h 20m
2026-06-29 SWT1SO - Jun 29, 01:50 UTCJun 29, 05:24 UTC3h 35m
2026-06-26 SWT2SO SOF → CGN Jun 26, 17:59 UTCJun 26, 21:24 UTC3h 25m
2026-06-26 SWT1SO - Jun 26, 02:50 UTCJun 26, 06:09 UTC3h 20m
2026-06-25 SWT2SO - Jun 25, 17:39 UTCJun 25, 21:15 UTC3h 35m
2026-06-25 SWT1SO - Jun 25, 02:49 UTCJun 25, 06:09 UTC3h 20m
2026-06-24 SWT2SO - Jun 24, 17:45 UTCJun 24, 21:19 UTC3h 35m
2026-06-24 SWT1SO - Jun 24, 02:45 UTCJun 24, 06:04 UTC3h 20m
2026-06-23 SWT2SO - Jun 23, 17:50 UTCJun 23, 21:24 UTC3h 35m
2026-06-23 SWT1SO - Jun 23, 02:34 UTCJun 23, 05:49 UTC3h 15m
2026-06-22 SWT2SO - Jun 22, 18:04 UTCJun 22, 21:40 UTC3h 35m
2026-06-22 SWT1SO - Jun 22, 02:40 UTCJun 22, 05:49 UTC3h 10m
2026-06-19 SWT2SO SOF → CGN Jun 19, 17:49 UTCJun 19, 21:30 UTC3h 40m
2026-06-19 SWT1SO CGN → SOF Jun 19, 02:39 UTCJun 19, 06:04 UTC3h 25m
2026-06-18 SWT2CW WRO → CGN Jun 18, 20:45 UTCJun 18, 23:05 UTC2h 20m
2026-06-18 SWT1CW CGN → WRO Jun 18, 02:25 UTCJun 18, 03:55 UTC1h 30m
2026-06-17 SWT2SO - Jun 17, 17:40 UTCJun 17, 21:20 UTC3h 40m
2026-06-17 SWT1SO - Jun 17, 02:45 UTCJun 17, 05:50 UTC3h 5m
2026-06-16 SWT2CW WRO → CGN Jun 16, 20:45 UTCJun 16, 22:35 UTC1h 50m
2026-06-16 SWT1CW CGN → WRO Jun 16, 02:29 UTCJun 16, 04:00 UTC1h 30m
2026-06-15 SWT2SO - Jun 15, 17:50 UTCJun 15, 21:50 UTC4h 0m
2026-06-15 SWT1SO - Jun 15, 01:55 UTCJun 15, 04:50 UTC2h 55m
2026-06-12 SWT2SO SOF → CGN Jun 12, 18:01 UTCJun 12, 22:00 UTC4h 0m
2026-06-12 SWT1SO CGN → SOF Jun 12, 02:45 UTCJun 12, 05:50 UTC3h 5m
2026-06-10 SWT2SO TIA → CGN Jun 10, 18:00 UTCJun 10, 21:25 UTC3h 25m
2026-06-10 SWT1SO CGN → SOF Jun 10, 03:20 UTCJun 10, 06:35 UTC3h 15m
2026-06-09 SWT2SO TIA → CGN Jun 9, 18:00 UTCJun 9, 21:35 UTC3h 35m
2026-06-09 SWT1SO CGN → SOF Jun 9, 02:40 UTCJun 9, 06:00 UTC3h 20m
2026-06-08 SWT2SO TIA → CGN Jun 8, 18:10 UTCJun 8, 21:45 UTC3h 35m

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

Mode-S 3451D6 frequently asked

What is Mode-S code 3451D6?
3451D6 is an ICAO 24-bit transponder address. Allocated to Spain. Assigned to EC-MKE.
Where is Mode-S 3451D6 registered?
Mode-S code 3451D6 is allocated to Spain (ES). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3451D6 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3451D6, octal 15050726, decimal 3,428,822.
What flights does 3451D6 operate?
Mode-S 3451D6 has broadcast 10 distinct callsigns, including SWT1CW, SWT2CW, SWT1SO, SWT2SO, SWT38U.