Apparatus

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sensors Mode-S transponder

4AB5CF

ICAO 24-bit transponder address · allocated to Sweden

Hex
4AB5CF
Octal
22532717
Decimal
4,896,207
Country
SE
No current signal · last broadcast 2d ago
Flights observed
51
Distinct callsigns
1
Country
SE
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4AB5CF.

Country allocation

The ICAO 24-bit address 4AB5CF 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 1 distinct

Callsign Airline Flights Last seen
SEMNO - 51 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 SEMNO - Jul 21, 10:05 UTCJul 21, 12:55 UTC2h 50m
2026-07-20 SEMNO - Jul 20, 06:35 UTCJul 20, 08:35 UTC2h 0m
2026-07-17 SEMNO - Jul 17, 14:30 UTCJul 17, 15:15 UTC45m
2026-07-17 SEMNO - Jul 17, 12:35 UTCJul 17, 13:15 UTC40m
2026-07-16 SEMNO - Jul 16, 15:14 UTCJul 16, 17:45 UTC2h 30m
2026-07-16 SEMNO - Jul 16, 07:30 UTCJul 16, 09:50 UTC2h 20m
2026-07-16 SEMNO - Jul 16, 06:20 UTCJul 16, 06:45 UTC25m
2026-07-15 SEMNO - Jul 15, 14:15 UTCJul 15, 15:00 UTC45m
2026-07-05 SEMNO - Jul 5, 15:45 UTCJul 5, 17:20 UTC1h 35m
2026-07-04 SEMNO - Jul 4, 13:55 UTCJul 4, 15:05 UTC1h 10m
2026-07-01 SEMNO - Jul 1, 16:15 UTCJul 1, 20:05 UTC3h 50m
2026-07-01 SEMNO - Jul 1, 10:00 UTCJul 1, 14:15 UTC4h 15m
2026-06-30 SEMNO - Jun 30, 18:05 UTCJun 30, 18:40 UTC35m
2026-06-30 SEMNO - Jun 30, 13:05 UTCJun 30, 13:50 UTC45m
2026-06-30 SEMNO - Jun 30, 10:55 UTCJun 30, 11:45 UTC50m
2026-06-28 SEMNO - Jun 28, 12:39 UTCJun 28, 16:55 UTC4h 15m
2026-06-28 SEMNO - Jun 28, 09:05 UTCJun 28, 10:15 UTC1h 10m
2026-06-28 SEMNO - Jun 28, 04:25 UTCJun 28, 07:50 UTC3h 25m
2026-06-22 SEMNO - Jun 22, 09:49 UTCJun 22, 11:54 UTC2h 5m
2026-06-22 SEMNO - Jun 22, 07:19 UTCJun 22, 09:14 UTC1h 55m
2026-06-20 SEMNO - Jun 20, 10:59 UTCJun 20, 11:09 UTC10m
2026-06-20 SEMNO - Jun 20, 09:49 UTCJun 20, 10:09 UTC20m
2026-06-20 SEMNO - Jun 20, 08:14 UTCJun 20, 09:09 UTC55m
2026-06-20 SEMNO - Jun 20, 07:14 UTCJun 20, 07:39 UTC25m
2026-06-18 SEMNO - Jun 18, 11:20 UTCJun 18, 14:25 UTC3h 5m
2026-06-18 SEMNO - Jun 18, 06:25 UTCJun 18, 09:00 UTC2h 35m
2026-06-16 SEMNO - Jun 16, 13:19 UTCJun 16, 13:34 UTC15m
2026-06-07 SEMNO - Jun 7, 13:30 UTCJun 7, 14:05 UTC35m
2026-06-07 SEMNO - Jun 7, 10:35 UTCJun 7, 11:50 UTC1h 15m
2026-06-07 SEMNO LYN → LYN Jun 7, 08:35 UTCJun 7, 09:10 UTC35m
2026-06-06 SEMNO LYN → LYN Jun 6, 16:04 UTCJun 6, 18:39 UTC2h 35m
2026-06-03 SEMNO - Jun 3, 11:10 UTCJun 3, 12:30 UTC1h 20m
2026-05-29 SEMNO - May 29, 15:05 UTCMay 29, 15:20 UTC15m
2026-05-29 SEMNO - May 29, 06:45 UTCMay 29, 09:30 UTC2h 45m
2026-05-26 SEMNO - May 26, 15:24 UTCMay 26, 15:35 UTC10m
2026-05-26 SEMNO - May 26, 13:29 UTCMay 26, 13:45 UTC15m
2026-05-26 SEMNO - May 26, 11:54 UTCMay 26, 12:10 UTC15m
2026-05-25 SEMNO - May 25, 17:30 UTCMay 25, 18:20 UTC50m
2026-05-25 SEMNO - May 25, 09:40 UTCMay 25, 10:30 UTC50m
2026-05-24 SEMNO - May 24, 13:00 UTCMay 24, 13:40 UTC40m
2026-05-22 SEMNO - May 22, 14:30 UTCMay 22, 17:40 UTC3h 10m
2026-05-21 SEMNO - May 21, 12:25 UTCMay 21, 15:25 UTC3h 0m
2026-04-28 SEMNO - Apr 28, 14:45 UTCApr 28, 15:00 UTC15m
2026-04-25 SEMNO - Apr 25, 13:45 UTCApr 25, 15:25 UTC1h 40m
2026-04-25 SEMNO - Apr 25, 12:40 UTCApr 25, 13:05 UTC25m
2026-04-24 SEMNO - Apr 24, 12:20 UTCApr 24, 12:35 UTC15m
2026-04-24 SEMNO - Apr 24, 08:55 UTCApr 24, 09:25 UTC30m
2026-04-24 SEMNO - Apr 24, 07:55 UTCApr 24, 08:20 UTC25m
2026-04-23 SEMNO - Apr 23, 16:50 UTCApr 23, 17:00 UTC10m
2026-04-23 SEMNO - Apr 23, 16:05 UTCApr 23, 16:20 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.

Mode-S 4AB5CF frequently asked

What is Mode-S code 4AB5CF?
4AB5CF is an ICAO 24-bit transponder address. Allocated to Sweden.
Where is Mode-S 4AB5CF registered?
Mode-S code 4AB5CF is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AB5CF broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AB5CF, octal 22532717, decimal 4,896,207.
What flights does 4AB5CF operate?
Mode-S 4AB5CF has broadcast 1 distinct callsign, including SEMNO.