Apparatus

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sensors Mode-S transponder

3474CB

ICAO 24-bit transponder address · allocated to Spain

Currently assigned to EC-OBQ · BOEING 737-800

Hex
3474CB
Octal
15072313
Decimal
3,437,771
Country
ES
Tail
EC-OBQ
Type
B738
Transponder active on ground
Flights observed
235
Distinct callsigns
20
Country
ES
Last broadcast
Jul 24, 20:50 UTC

Last known position

Most recent position reported by Mode-S 3474CB.

Country allocation

The ICAO 24-bit address 3474CB 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
BCS2886 European Air Transport 13 2026-07-23
BCS9236 - 12 2026-07-17
BCS7019 - 12 2026-07-17
BCS9237 - 11 2026-07-17
BCS8UM - 10 2026-07-08
BCS2MC European Air Transport 10 2026-07-23
BCS136 - 10 2026-07-07
BCS408 European Air Transport 9 2026-07-16
BCS4894 European Air Transport 8 2026-07-24
BCS428 European Air Transport 8 2026-07-23
BCS81Q - 7 2026-07-24
BCS7552 - 7 2026-07-21
BCS417 European Air Transport 7 2026-07-22
BCS1GH - 7 2026-07-22
BCS7750 - 6 2026-07-21
BCS3JM - 6 2026-06-23
BCS34W - 6 2026-07-21
BCS71R - 5 2026-06-29
BCS5959 - 5 2026-06-29
BCS4908 - 5 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 BCS81Q GVA → LEJ Jul 24, 19:40 UTCJul 24, 20:50 UTC1h 10m
2026-07-24 BCS4894 MXP → GVA Jul 24, 03:10 UTCJul 24, 04:10 UTC1h 0m
2026-07-23 BCS428 BRU → VIT Jul 23, 23:35 UTCJul 24, 00:35 UTC1h 0m
2026-07-23 BCS2MC DUB → LEJ Jul 23, 20:10 UTCJul 23, 20:50 UTC40m
2026-07-23 BCS2886 BRU → DUB Jul 23, 02:10 UTCJul 23, 03:25 UTC1h 15m
2026-07-22 BCS417 VIT → BRU Jul 22, 21:30 UTCJul 22, 23:00 UTC1h 30m
2026-07-22 BCS1GH - Jul 22, 18:20 UTCJul 22, 19:05 UTC45m
2026-07-22 BCS448 LEJ → CGN Jul 22, 00:05 UTCJul 22, 01:45 UTC1h 40m
2026-07-21 BCS4301 LNZ → CGN Jul 21, 20:30 UTCJul 21, 21:30 UTC1h 0m
2026-07-21 BCS34W SKG → LNZ Jul 21, 16:55 UTCJul 21, 18:50 UTC1h 55m
2026-07-21 BCS7750 ATH → SKG Jul 21, 07:25 UTCJul 21, 08:05 UTC40m
2026-07-21 BCS7552 CGN → ATH Jul 21, 02:40 UTCJul 21, 05:10 UTC2h 30m
2026-07-20 BCS428 EMA → CGN Jul 20, 23:25 UTCJul 21, 00:35 UTC1h 9m
2026-07-20 BCS2MC DUB → EMA Jul 20, 20:15 UTCJul 20, 20:50 UTC35m
2026-07-19 BCS2886 - Jul 19, 21:15 UTCJul 19, 22:30 UTC1h 15m
2026-07-17 BCS7019 - Jul 17, 20:55 UTCJul 17, 22:20 UTC1h 25m
2026-07-17 BCS9237 - Jul 17, 17:05 UTCJul 17, 18:34 UTC1h 30m
2026-07-17 BCS9236 - Jul 17, 08:49 UTCJul 17, 09:30 UTC40m
2026-07-17 BCS7552 CGN → ATH Jul 17, 02:50 UTCJul 17, 05:20 UTC2h 30m
2026-07-16 BCS408 MXP → CGN Jul 16, 23:05 UTCJul 17, 00:14 UTC1h 10m
2026-07-16 BCS4515 - Jul 16, 20:35 UTCJul 16, 21:10 UTC35m
2026-07-16 BCS4908 - Jul 16, 02:40 UTCJul 16, 03:35 UTC55m
2026-07-14 BCS204P - Jul 14, 07:00 UTCJul 14, 07:35 UTC35m
2026-07-14 BCS4PK LEJ → CGN Jul 14, 05:00 UTCJul 14, 05:50 UTC50m
2026-07-13 BCS80A MXP → LEJ Jul 13, 20:45 UTCJul 13, 22:00 UTC1h 15m
2026-07-13 BCS87W - Jul 13, 18:30 UTCJul 13, 19:25 UTC55m
2026-07-12 BCS4850 LEJ → LJU Jul 12, 22:55 UTCJul 12, 23:55 UTC1h 0m
2026-07-10 BCS81Q GVA → LEJ Jul 10, 20:30 UTCJul 10, 21:35 UTC1h 5m
2026-07-10 BCS4894 CGN → GVA Jul 10, 03:20 UTCJul 10, 04:25 UTC1h 5m
2026-07-09 BCS428 EMA → CGN Jul 9, 23:30 UTCJul 10, 00:30 UTC1h 0m
2026-07-09 BCS2MC DUB → LEJ Jul 9, 20:25 UTCJul 9, 21:00 UTC35m
2026-07-09 BCS2886 - Jul 9, 02:15 UTCJul 9, 03:25 UTC1h 10m
2026-07-08 BCS7019 BLQ → BRU Jul 8, 20:50 UTCJul 8, 22:15 UTC1h 25m
2026-07-08 BCS9237 - Jul 8, 16:55 UTCJul 8, 18:20 UTC1h 25m
2026-07-08 BCS9236 - Jul 8, 07:05 UTCJul 8, 07:50 UTC45m
2026-07-08 BCS8UM MXP → ATH Jul 8, 03:15 UTCJul 8, 05:15 UTC2h 0m
2026-07-07 BCS136 LEJ → MXP Jul 7, 22:40 UTCJul 7, 23:55 UTC1h 15m
2026-07-07 BCS81Q GVA → LEJ Jul 7, 20:00 UTCJul 7, 21:15 UTC1h 15m
2026-07-07 BCS4894 CGN → GVA Jul 7, 03:15 UTCJul 7, 04:15 UTC1h 0m
2026-07-06 BCS428 EMA → CGN Jul 6, 23:25 UTCJul 7, 00:30 UTC1h 5m
2026-07-06 BCS2MC DUB → LEJ Jul 6, 20:20 UTCJul 6, 21:00 UTC40m
2026-07-05 BCS2886 BRU → DUB Jul 5, 21:05 UTCJul 5, 22:30 UTC1h 25m
2026-07-03 BCS7019 - Jul 3, 20:40 UTCJul 3, 22:10 UTC1h 30m
2026-07-03 BCS9237 - Jul 3, 16:55 UTCJul 3, 18:20 UTC1h 25m
2026-07-03 BCS9236 - Jul 3, 06:45 UTCJul 3, 07:25 UTC40m
2026-07-03 BCS8UM MXP → ATH Jul 3, 01:40 UTCJul 3, 03:45 UTC2h 5m
2026-07-02 BCS136 LEJ → MXP Jul 2, 22:35 UTCJul 3, 00:00 UTC1h 25m
2026-07-02 BCS81Q - Jul 2, 19:45 UTCJul 2, 21:00 UTC1h 15m
2026-07-02 BCS4894 MXP → GVA Jul 2, 03:20 UTCJul 2, 04:20 UTC1h 0m
2026-07-01 BCS408 - Jul 1, 22:35 UTCJul 1, 23:35 UTC1h 0m

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

Mode-S 3474CB frequently asked

What is Mode-S code 3474CB?
3474CB is an ICAO 24-bit transponder address. Allocated to Spain. Assigned to EC-OBQ.
Where is Mode-S 3474CB registered?
Mode-S code 3474CB is allocated to Spain (ES). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3474CB broadcasting right now?
Mode-S 3474CB is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3474CB, octal 15072313, decimal 3,437,771.
What flights does 3474CB operate?
Mode-S 3474CB has broadcast 20 distinct callsigns, including BCS2886, BCS9236, BCS7019, BCS9237, BCS8UM.