Apparatus

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sensors Mode-S transponder

34840A

ICAO 24-bit transponder address · allocated to Spain

Currently assigned to EC-OPA · BOEING 737 MAX 8

Hex
34840A
Octal
15102012
Decimal
3,441,674
Country
ES
Tail
EC-OPA
Type
B38M
Broadcasting now · callsign AEA84SZ · 37,825 ft
Flights observed
447
Distinct callsigns
20
Country
ES
Last broadcast
Jul 26, 18:55 UTC

Current position

34840A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 34840A 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
AEA17AZ - 25 2026-07-18
AEA39FR - 24 2026-07-18
AEA57CN - 23 2026-07-18
AEA87NM - 22 2026-07-18
AEA82NJ Air Europa 19 2026-07-20
AEA17BN - 19 2026-07-20
AEA78FN - 18 2026-07-20
AEA11HB Air Europa 18 2026-07-20
AEA9117 - 16 2026-07-21
AEA37MY Air Europa 16 2026-07-21
AEA1518 Air Europa 16 2026-07-25
AEA42DP Air Europa 15 2026-07-25
AEA96DJ Air Europa 13 2026-07-25
AEA83HV Air Europa 13 2026-07-24
AEA69WQ - 13 2026-07-24
AEA24UW Air Europa 13 2026-07-25
AEA96LZ Air Europa 12 2026-07-24
AEA84SZ Air Europa 12 2026-07-24
AEA45BT - 10 2026-07-21
AEA36NR Air Europa 10 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AEA26LC BRU → MAD Jul 26, 17:05 UTCJul 26, 18:55 UTC1h 50m
2026-07-26 AEA36NR MAD → BRU Jul 26, 13:50 UTCJul 26, 15:45 UTC1h 55m
2026-07-26 AEA58KE OPO → MAD Jul 26, 10:55 UTCJul 26, 11:45 UTC50m
2026-07-26 AEA82KJ MAD → OPO Jul 26, 08:45 UTCJul 26, 09:35 UTC50m
2026-07-26 AEA1144 OPO → MAD Jul 26, 06:50 UTCJul 26, 07:40 UTC50m
2026-07-26 AEA37KP MAD → OPO Jul 26, 04:45 UTCJul 26, 05:35 UTC50m
2026-07-25 AEA1518 MUC → MAD Jul 25, 17:25 UTCJul 25, 19:40 UTC2h 15m
2026-07-25 AEA42DP MAD → MUC Jul 25, 13:50 UTCJul 25, 15:35 UTC1h 45m
2026-07-25 AEA96DJ TFN → MAD Jul 25, 09:35 UTCJul 25, 11:45 UTC2h 10m
2026-07-25 AEA24UW MAD → TFN Jul 25, 06:00 UTCJul 25, 08:20 UTC2h 20m
2026-07-24 AEA96LZ AMS → MAD Jul 24, 17:05 UTCJul 24, 19:20 UTC2h 15m
2026-07-24 AEA84SZ MAD → AMS Jul 24, 13:25 UTCJul 24, 15:20 UTC1h 55m
2026-07-24 AEA69WQ MUC → MAD Jul 24, 09:05 UTCJul 24, 11:20 UTC2h 15m
2026-07-24 AEA83HV MAD → MUC Jul 24, 05:40 UTCJul 24, 07:45 UTC2h 5m
2026-07-23 AEA26LC BRU → MAD Jul 23, 17:05 UTCJul 23, 18:55 UTC1h 50m
2026-07-23 AEA36NR MAD → BRU Jul 23, 13:45 UTCJul 23, 15:40 UTC1h 55m
2026-07-23 AEA9161 - Jul 23, 09:25 UTCJul 23, 11:30 UTC2h 5m
2026-07-23 AEA9156 MAD → LPA Jul 23, 05:15 UTCJul 23, 07:25 UTC2h 10m
2026-07-22 AEA32SL ORY → MAD Jul 22, 17:35 UTCJul 22, 19:05 UTC1h 30m
2026-07-22 AEA17TW MAD → ORY Jul 22, 14:55 UTCJul 22, 16:20 UTC1h 25m
2026-07-22 AEA9161 - Jul 22, 10:20 UTCJul 22, 11:35 UTC1h 15m
2026-07-21 AEA9117 - Jul 21, 17:50 UTCJul 21, 20:00 UTC2h 10m
2026-07-21 AEA37MY MAD → TFN Jul 21, 13:30 UTCJul 21, 15:50 UTC2h 20m
2026-07-21 AEA45BT BRU → MAD Jul 21, 09:15 UTCJul 21, 11:15 UTC2h 0m
2026-07-21 AEA1171 MAD → BRU Jul 21, 05:35 UTCJul 21, 07:30 UTC1h 55m
2026-07-20 AEA11HB LGW → MAD Jul 20, 17:10 UTCJul 20, 19:05 UTC1h 55m
2026-07-20 AEA78FN - Jul 20, 13:35 UTCJul 20, 15:40 UTC2h 5m
2026-07-20 AEA17BN - Jul 20, 09:50 UTCJul 20, 11:50 UTC2h 0m
2026-07-20 AEA82NJ MAD → LGW Jul 20, 06:55 UTCJul 20, 08:35 UTC1h 40m
2026-07-19 AEA82PV - Jul 19, 19:25 UTCJul 19, 20:10 UTC45m
2026-07-19 AEA86ED - Jul 19, 17:40 UTCJul 19, 18:30 UTC50m
2026-07-19 AEA57PG OPO → MAD Jul 19, 15:35 UTCJul 19, 16:20 UTC45m
2026-07-19 AEA48DE - Jul 19, 13:35 UTCJul 19, 14:25 UTC50m
2026-07-19 AEA58KE OPO → MAD Jul 19, 10:55 UTCJul 19, 11:40 UTC45m
2026-07-19 AEA82KJ - Jul 19, 08:50 UTCJul 19, 09:40 UTC50m
2026-07-19 AEA1144 OPO → MAD Jul 19, 06:45 UTCJul 19, 07:35 UTC50m
2026-07-19 AEA37KP MAD → OPO Jul 19, 04:45 UTCJul 19, 05:35 UTC50m
2026-07-18 AEA87NM - Jul 18, 20:30 UTCJul 18, 22:45 UTC2h 15m
2026-07-18 AEA57CN - Jul 18, 13:50 UTCJul 18, 16:05 UTC2h 15m
2026-07-18 AEA39FR FRA → MAD Jul 18, 09:15 UTCJul 18, 11:30 UTC2h 15m
2026-07-18 AEA17AZ - Jul 18, 05:20 UTCJul 18, 07:15 UTC1h 55m
2026-07-17 AEA9117 - Jul 17, 17:25 UTCJul 17, 19:35 UTC2h 10m
2026-07-17 AEA37MY MAD → TFN Jul 17, 13:45 UTCJul 17, 16:00 UTC2h 15m
2026-07-17 AEA9156 - Jul 17, 05:50 UTCJul 17, 11:50 UTC6h 0m
2026-07-16 AEA1423 - Jul 16, 22:15 UTCJul 17, 02:25 UTC4h 10m
2026-07-16 AEA9117 - Jul 16, 17:35 UTCJul 16, 19:45 UTC2h 10m
2026-07-16 AEA37MY - Jul 16, 13:45 UTCJul 16, 16:00 UTC2h 15m
2026-07-16 AEA96DJ - Jul 16, 09:35 UTCJul 16, 12:00 UTC2h 25m
2026-07-16 AEA24UW - Jul 16, 05:40 UTCJul 16, 08:00 UTC2h 20m
2026-07-15 AEA9117 - Jul 15, 17:15 UTCJul 15, 19:30 UTC2h 15m

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

Mode-S 34840A frequently asked

What is Mode-S code 34840A?
34840A is an ICAO 24-bit transponder address. Allocated to Spain. Assigned to EC-OPA.
Where is Mode-S 34840A registered?
Mode-S code 34840A is allocated to Spain (ES). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 34840A broadcasting right now?
Yes. Mode-S 34840A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 34840A, octal 15102012, decimal 3,441,674.
What flights does 34840A operate?
Mode-S 34840A has broadcast 20 distinct callsigns, including AEA17AZ, AEA39FR, AEA57CN, AEA87NM, AEA82NJ.