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
No current signal · last broadcast 18h ago
Flights observed
113
Distinct callsigns
20
Country
ES
Last broadcast
18h ago

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 6 2026-05-29
BCS9236 European Air Transport 5 2026-05-21
BCS7019 European Air Transport 5 2026-05-21
BCS408 European Air Transport 5 2026-05-13
BCS9237 European Air Transport 4 2026-05-19
BCS8UM European Air Transport 4 2026-05-21
BCS7552 European Air Transport 4 2026-05-14
BCS472 European Air Transport 4 2026-05-28
BCS417 European Air Transport 4 2026-05-28
BCS3JM - 4 2026-05-28
BCS1GH European Air Transport 4 2026-05-28
BCS136 European Air Transport 4 2026-05-20
BCS7750 European Air Transport 3 2026-05-15
BCS71R European Air Transport 3 2026-05-20
BCS71N European Air Transport 3 2026-05-27
BCS5959 - 3 2026-05-20
BCS4VK European Air Transport 3 2026-04-13
BCS4245 European Air Transport 3 2026-05-29
BCS3TW European Air Transport 3 2026-05-29
BCS34W European Air Transport 3 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BCS4245 MUC → MXP May 29, 21:35 UTCMay 29, 22:20 UTC45m
2026-05-29 BCS3TW DUB → DUB May 29, 04:35 UTCMay 29, 06:25 UTC1h 50m
2026-05-29 BCS2886 BRU → DUB May 29, 02:20 UTCMay 29, 03:35 UTC1h 15m
2026-05-28 BCS417 VIT → BRU May 28, 21:30 UTCMay 28, 23:00 UTC1h 30m
2026-05-28 BCS1GH SCQ → VIT May 28, 18:25 UTCMay 28, 19:05 UTC40m
2026-05-28 BCS3JM - May 28, 06:05 UTCMay 28, 06:40 UTC35m
2026-05-28 BCS472 EMA → EMA May 28, 01:20 UTCMay 28, 03:00 UTC1h 40m
2026-05-27 BCS473 VIT → EMA May 27, 21:45 UTCMay 27, 23:20 UTC1h 35m
2026-05-27 BCS22W EMA → ALC May 27, 18:15 UTCMay 27, 19:05 UTC50m
2026-05-27 BCS71N VIT → ALC May 27, 05:55 UTCMay 27, 06:40 UTC45m
2026-05-27 BCS472 EMA → EMA May 27, 01:19 UTCMay 27, 02:59 UTC1h 40m
2026-05-26 BCS472 EMA → EMA May 26, 22:09 UTCMay 26, 23:39 UTC1h 30m
2026-05-26 BCS22W EMA → ALC May 26, 18:14 UTCMay 26, 19:05 UTC50m
2026-05-26 BCS71N VIT → ALC May 26, 05:45 UTCMay 26, 06:34 UTC50m
2026-05-26 BCS472 EMA → EMA May 26, 01:30 UTCMay 26, 03:09 UTC1h 40m
2026-05-25 BCS473 VIT → EMA May 25, 21:45 UTCMay 25, 23:14 UTC1h 30m
2026-05-25 BCS22W EMA → ALC May 25, 18:20 UTCMay 25, 19:10 UTC50m
2026-05-25 BCS71N VIT → ALC May 25, 04:25 UTCMay 25, 05:10 UTC45m
2026-05-24 BCS422 MXP → VIT May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-22 BCS4245 MUC → MXP May 22, 21:25 UTCMay 22, 22:25 UTC1h 0m
2026-05-22 BCS3TW DUB → DUB May 22, 04:55 UTCMay 22, 06:45 UTC1h 50m
2026-05-22 BCS2886 BRU → DUB May 22, 02:25 UTCMay 22, 03:45 UTC1h 20m
2026-05-21 BCS7019 BLQ → BRU May 21, 20:35 UTCMay 21, 22:00 UTC1h 25m
2026-05-21 BCS700P OTP → LEJ May 21, 16:30 UTCMay 21, 17:50 UTC1h 20m
2026-05-21 BCS9236 ATH → SKP May 21, 07:10 UTCMay 21, 07:50 UTC40m
2026-05-21 BCS8UM MXP → ATH May 21, 01:45 UTCMay 21, 03:45 UTC2h 0m
2026-05-20 BCS136 LEJ → MXP May 20, 22:25 UTCMay 20, 23:35 UTC1h 10m
2026-05-20 BCS71R VNO → LEJ May 20, 18:55 UTCMay 20, 20:30 UTC1h 35m
2026-05-20 BCS5959 LEJ → VNO May 20, 03:15 UTCMay 20, 04:40 UTC1h 26m
2026-05-19 BCS2200 BRU → LEJ May 19, 23:45 UTCMay 20, 00:40 UTC55m
2026-05-19 BCS7019 BLQ → BRU May 19, 20:45 UTCMay 19, 22:10 UTC1h 25m
2026-05-19 BCS9237 BLQ → LEJ May 19, 16:55 UTCMay 19, 18:10 UTC1h 15m
2026-05-19 BCS9236 ATH → SKP May 19, 07:15 UTCMay 19, 07:50 UTC35m
2026-05-19 BCS8UM MXP → ATH May 19, 01:45 UTCMay 19, 03:45 UTC2h 0m
2026-05-18 BCS136 LEJ → MXP May 18, 22:35 UTCMay 18, 23:40 UTC1h 5m
2026-05-18 BCS71R VNO → LEJ May 18, 18:45 UTCMay 18, 20:10 UTC1h 25m
2026-05-18 BCS5959 LEJ → VNO May 18, 01:05 UTCMay 18, 02:30 UTC1h 25m
2026-05-15 BCS34W SKG → VCE May 15, 17:00 UTCMay 15, 19:05 UTC2h 5m
2026-05-15 BCS7750 ATH → SKG May 15, 07:40 UTCMay 15, 08:30 UTC50m
2026-05-14 BCS7551 SKG → BLQ May 14, 17:05 UTCMay 14, 17:45 UTC40m
2026-05-14 BCS7750 ATH → SKG May 14, 07:25 UTCMay 14, 08:00 UTC35m
2026-05-14 BCS7552 LEJ → CGN May 14, 02:40 UTCMay 14, 05:10 UTC2h 30m
2026-05-13 BCS408 MXP → CGN May 13, 22:55 UTCMay 13, 23:50 UTC55m
2026-05-13 BCS241P - May 13, 19:30 UTCMay 13, 20:00 UTC30m
2026-05-13 BCS4894 MXP → GVA May 13, 03:20 UTCMay 13, 04:20 UTC1h 0m
2026-05-12 BCS428 BRU → VIT May 12, 23:25 UTCMay 13, 00:25 UTC1h 0m
2026-05-12 BCS2MC DUB → LEJ May 12, 20:20 UTCMay 12, 21:01 UTC40m
2026-05-11 BCS417 VIT → BRU May 11, 21:25 UTCMay 12, 03:40 UTC6h 15m
2026-05-11 BCS1GH SCQ → VIT May 11, 17:55 UTCMay 11, 18:35 UTC40m
2026-05-11 BCS3JM - May 11, 04:15 UTCMay 11, 05:00 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-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?
No active broadcast right now. Last signal was 18h ago.
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, BCS408, BCS9237.