Apparatus

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sensors Mode-S transponder

34754C

ICAO 24-bit transponder address · allocated to Spain

Currently assigned to EC-OBY · AIRBUS A-321neo

Hex
34754C
Octal
15072514
Decimal
3,437,900
Country
ES
Tail
EC-OBY
Type
A21N
No current signal · last broadcast 27m ago
Flights observed
24
Distinct callsigns
16
Country
ES
Last broadcast
27m ago

Last known position

Most recent position reported by Mode-S 34754C.

Country allocation

The ICAO 24-bit address 34754C 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 16 distinct

Callsign Airline Flights Last seen
IBS16RM Iberia Express 2 2026-04-17
IBS16MX Iberia Express 2 2026-04-18
IBS15ZZ - 2 2026-04-16
IBS15SM Iberia Express 2 2026-04-16
IBS15SL Iberia Express 2 2026-04-16
IBS1590 Iberia Express 2 2026-04-17
IBS1524 Iberia Express 2 2026-04-17
IBS1523 Iberia Express 2 2026-04-17
IBS16YW Iberia Express 1 2026-04-17
IBS16PH Iberia Express 1 2026-04-18
IBS16KM Iberia Express 1 2026-04-18
IBS16JP Iberia Express 1 2026-04-18
IBS1624 - 1 2026-04-12
IBS1623 - 1 2026-04-12
IBS15WW Iberia Express 1 2026-04-18
IBS1581 Iberia Express 1 2026-04-18

Recent flights last 24

DateFlightRouteTakeoffLandingDuration
2026-04-18 IBS15WW MAD → TFN Apr 18, 18:10 UTCApr 18, 18:45 UTC35m
2026-04-18 IBS1581 MAD → TFN Apr 18, 14:20 UTCApr 18, 17:00 UTC2h 40m
2026-04-18 IBS16KM MAD → LPA Apr 18, 11:45 UTCApr 18, 12:45 UTC1h 0m
2026-04-18 IBS16PH MAD → PMI Apr 18, 09:40 UTCApr 18, 10:40 UTC1h 0m
2026-04-18 IBS16MX IBZ → MAD Apr 18, 07:25 UTCApr 18, 07:45 UTC20m
2026-04-18 IBS16MX IBZ → MAD Apr 18, 07:00 UTCApr 18, 07:20 UTC20m
2026-04-18 IBS16JP MAD → IBZ Apr 18, 05:25 UTCApr 18, 06:00 UTC35m
2026-04-17 IBS16YW LPA → MAD Apr 17, 21:25 UTCApr 17, 22:30 UTC1h 5m
2026-04-17 IBS16RM PMI → MAD Apr 17, 17:25 UTCApr 17, 18:10 UTC45m
2026-04-17 IBS16RM PMI → MAD Apr 17, 16:55 UTCApr 17, 17:15 UTC20m
2026-04-17 IBS1524 FUE → MAD Apr 17, 15:20 UTCApr 17, 15:30 UTC10m
2026-04-17 IBS1524 FUE → MAD Apr 17, 13:40 UTCApr 17, 15:15 UTC1h 35m
2026-04-17 IBS1523 MAD → FUE Apr 17, 11:50 UTCApr 17, 12:00 UTC10m
2026-04-17 IBS1523 MAD → FUE Apr 17, 10:05 UTCApr 17, 11:15 UTC1h 10m
2026-04-17 IBS1590 TFN → MAD Apr 17, 07:20 UTCApr 17, 08:25 UTC1h 5m
2026-04-17 IBS1590 TFN → MAD Apr 17, 06:05 UTCApr 17, 07:15 UTC1h 10m
2026-04-16 IBS15SL MAD → TFN Apr 16, 21:14 UTCApr 16, 21:24 UTC10m
2026-04-16 IBS15SL MAD → TFN Apr 16, 19:15 UTCApr 16, 21:10 UTC1h 55m
2026-04-16 IBS15ZZ - Apr 16, 17:15 UTCApr 16, 17:54 UTC40m
2026-04-16 IBS15ZZ - Apr 16, 15:35 UTCApr 16, 17:10 UTC1h 35m
2026-04-16 IBS15SM TFN → MAD Apr 16, 13:15 UTCApr 16, 14:20 UTC1h 5m
2026-04-16 IBS15SM TFN → MAD Apr 16, 12:09 UTCApr 16, 13:05 UTC55m
2026-04-12 IBS1624 - Apr 12, 19:05 UTCApr 12, 20:15 UTC1h 10m
2026-04-12 IBS1623 - Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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

Mode-S 34754C frequently asked

What is Mode-S code 34754C?
34754C is an ICAO 24-bit transponder address. Allocated to Spain. Assigned to EC-OBY.
Where is Mode-S 34754C registered?
Mode-S code 34754C is allocated to Spain (ES). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 34754C broadcasting right now?
No active broadcast right now. Last signal was 27m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 34754C, octal 15072514, decimal 3,437,900.
What flights does 34754C operate?
Mode-S 34754C has broadcast 16 distinct callsigns, including IBS16RM, IBS16MX, IBS15ZZ, IBS15SM, IBS15SL.