Apparatus

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sensors Mode-S transponder

4AECD2

ICAO 24-bit transponder address · allocated to Sweden

Hex
4AECD2
Octal
22566322
Decimal
4,910,290
Country
SE
No current signal · last broadcast 21h ago
Flights observed
43
Distinct callsigns
3
Country
SE
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 4AECD2.

Country allocation

The ICAO 24-bit address 4AECD2 falls within the block assigned to Sweden (SE) by ICAO Annex 10, Volume III. Every aircraft registered in Sweden 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 3 distinct

Callsign Airline Flights Last seen
SVF665 - 38 2026-07-17
SVF631 - 3 2026-06-17
SVF643 - 2 2026-07-08

Recent flights last 43

DateFlightRouteTakeoffLandingDuration
2026-07-17 SVF665 - Jul 17, 09:25 UTCJul 17, 09:50 UTC25m
2026-07-17 SVF665 - Jul 17, 07:25 UTCJul 17, 07:44 UTC20m
2026-07-08 SVF643 - Jul 8, 19:40 UTCJul 8, 19:55 UTC15m
2026-07-07 SVF643 - Jul 7, 06:10 UTCJul 7, 09:00 UTC2h 50m
2026-07-01 SVF665 - Jul 1, 11:30 UTCJul 1, 12:00 UTC30m
2026-07-01 SVF665 - Jul 1, 08:20 UTCJul 1, 08:50 UTC30m
2026-06-24 SVF665 - Jun 24, 12:04 UTCJun 24, 12:40 UTC35m
2026-06-24 SVF665 - Jun 24, 11:34 UTCJun 24, 11:54 UTC20m
2026-06-24 SVF665 - Jun 24, 08:04 UTCJun 24, 10:10 UTC2h 5m
2026-06-23 SVF665 ARN → ARN Jun 23, 10:39 UTCJun 23, 11:49 UTC1h 10m
2026-06-23 SVF665 - Jun 23, 08:15 UTCJun 23, 08:54 UTC40m
2026-06-23 SVF665 - Jun 23, 07:15 UTCJun 23, 07:40 UTC25m
2026-06-22 SVF665 - Jun 22, 11:35 UTCJun 22, 12:19 UTC45m
2026-06-22 SVF665 - Jun 22, 10:25 UTCJun 22, 11:04 UTC40m
2026-06-22 SVF665 - Jun 22, 08:54 UTCJun 22, 09:14 UTC20m
2026-06-22 SVF665 - Jun 22, 07:14 UTCJun 22, 07:49 UTC35m
2026-06-17 SVF631 - Jun 17, 22:30 UTCJun 18, 07:30 UTC9h 0m
2026-06-15 SVF631 - Jun 15, 11:00 UTCJun 15, 20:00 UTC9h 0m
2026-06-15 SVF631 ARN → BRU Jun 15, 07:20 UTCJun 15, 09:00 UTC1h 40m
2026-06-12 SVF665 - Jun 12, 08:15 UTCJun 12, 08:55 UTC40m
2026-06-12 SVF665 - Jun 12, 06:25 UTCJun 12, 07:45 UTC1h 20m
2026-06-11 SVF665 - Jun 11, 12:45 UTCJun 11, 14:05 UTC1h 20m
2026-06-11 SVF665 - Jun 11, 11:05 UTCJun 11, 11:55 UTC50m
2026-06-10 SVF665 - Jun 10, 11:35 UTCJun 10, 14:05 UTC2h 30m
2026-06-10 SVF665 - Jun 10, 08:50 UTCJun 10, 09:05 UTC15m
2026-06-10 SVF665 - Jun 10, 06:25 UTCJun 10, 07:55 UTC1h 30m
2026-06-09 SVF665 ARN → ARN Jun 9, 11:10 UTCJun 9, 14:00 UTC2h 50m
2026-06-09 SVF665 ARN → ARN Jun 9, 06:15 UTCJun 9, 08:35 UTC2h 20m
2026-06-08 SVF665 - Jun 8, 08:40 UTCJun 8, 09:15 UTC35m
2026-06-08 SVF665 - Jun 8, 07:10 UTCJun 8, 07:30 UTC20m
2026-06-08 SVF665 - Jun 8, 06:15 UTCJun 8, 06:35 UTC20m
2026-06-05 SVF665 - Jun 5, 07:55 UTCJun 5, 09:10 UTC1h 15m
2026-06-05 SVF665 - Jun 5, 07:25 UTCJun 5, 07:45 UTC20m
2026-06-05 SVF665 ARN → OSD Jun 5, 06:15 UTCJun 5, 07:00 UTC45m
2026-06-04 SVF665 - Jun 4, 08:00 UTCJun 4, 09:00 UTC1h 0m
2026-06-04 SVF665 - Jun 4, 06:30 UTCJun 4, 07:05 UTC35m
2026-06-03 SVF665 - Jun 3, 12:25 UTCJun 3, 13:45 UTC1h 20m
2026-06-03 SVF665 - Jun 3, 11:10 UTCJun 3, 11:45 UTC35m
2026-06-03 SVF665 - Jun 3, 07:25 UTCJun 3, 09:10 UTC1h 45m
2026-06-03 SVF665 - Jun 3, 06:00 UTCJun 3, 06:25 UTC25m
2026-06-02 SVF665 ARN → ARN Jun 2, 12:10 UTCJun 2, 14:45 UTC2h 35m
2026-06-02 SVF665 - Jun 2, 08:05 UTCJun 2, 08:45 UTC40m
2026-06-02 SVF665 ARN → OSD Jun 2, 06:50 UTCJun 2, 07:45 UTC55m

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.

Mode-S 4AECD2 frequently asked

What is Mode-S code 4AECD2?
4AECD2 is an ICAO 24-bit transponder address. Allocated to Sweden.
Where is Mode-S 4AECD2 registered?
Mode-S code 4AECD2 is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AECD2 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AECD2, octal 22566322, decimal 4,910,290.
What flights does 4AECD2 operate?
Mode-S 4AECD2 has broadcast 3 distinct callsigns, including SVF665, SVF631, SVF643.