sensors Mode-S transponder

34745A

ICAO 24-bit transponder address · allocated to Spain

Currently assigned to EC-NZN · BOEING 737-800

Hex
34745A
Octal
15072132
Decimal
3,437,658
Country
ES
Tail
EC-NZN
Type
B738
No current signal · last broadcast 15h ago
Flights observed
16
Distinct callsigns
13
Country
ES
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S 34745A.

Country allocation

The ICAO 24-bit address 34745A 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 13 distinct

Callsign Airline Flights Last seen
AEA78TJ - 3 2026-04-13
AEA7238 - 2 2026-04-13
AEA89MM - 1 2026-04-13
AEA85TA - 1 2026-04-13
AEA79ZK - 1 2026-04-13
AEA78VW Air Europa 1 2026-04-14
AEA73FB - 1 2026-04-14
AEA7233 Air Europa 1 2026-04-13
AEA66ZQ - 1 2026-04-13
AEA52ER - 1 2026-04-12
AEA47JU - 1 2026-04-12
AEA15UP - 1 2026-04-14
AEA12BZ - 1 2026-04-13

Recent flights last 16

DateFlightRouteTakeoffLandingDuration
2026-04-14 AEA73FB - Apr 14, 10:20 UTCApr 14, 10:50 UTC30m
2026-04-14 AEA15UP - Apr 14, 08:35 UTCApr 14, 09:05 UTC30m
2026-04-14 AEA78VW MAD → ALC Apr 14, 05:30 UTCApr 14, 06:10 UTC40m
2026-04-13 AEA7238 - Apr 13, 19:50 UTCApr 13, 20:35 UTC45m
2026-04-13 AEA7238 - Apr 13, 19:40 UTCApr 13, 20:10 UTC30m
2026-04-13 AEA66ZQ - Apr 13, 17:45 UTCApr 13, 18:25 UTC40m
2026-04-13 AEA78TJ - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 AEA78TJ - Apr 13, 15:50 UTCApr 13, 16:30 UTC40m
2026-04-13 AEA78TJ - Apr 13, 15:35 UTCApr 13, 16:15 UTC40m
2026-04-13 AEA89MM - Apr 13, 13:40 UTCApr 13, 14:30 UTC50m
2026-04-13 AEA79ZK LCG → MAD Apr 13, 10:50 UTCApr 13, 11:50 UTC1h 0m
2026-04-13 AEA85TA - Apr 13, 09:00 UTCApr 13, 09:55 UTC55m
2026-04-13 AEA12BZ LCG → MAD Apr 13, 06:55 UTCApr 13, 07:50 UTC55m
2026-04-13 AEA7233 MAD → LCG Apr 13, 05:00 UTCApr 13, 06:00 UTC1h 0m
2026-04-12 AEA47JU - Apr 12, 19:15 UTCApr 12, 20:00 UTC45m
2026-04-12 AEA52ER - Apr 12, 17:25 UTCApr 12, 18:10 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-NZN page for operator, model, and routing details .

Mode-S 34745A frequently asked

What is Mode-S code 34745A?
34745A is an ICAO 24-bit transponder address. Allocated to Spain. Assigned to EC-NZN.
Where is Mode-S 34745A registered?
Mode-S code 34745A is allocated to Spain (ES). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 34745A broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 34745A, octal 15072132, decimal 3,437,658.
What flights does 34745A operate?
Mode-S 34745A has broadcast 13 distinct callsigns, including AEA78TJ, AEA7238, AEA89MM, AEA85TA, AEA79ZK.