Apparatus

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sensors Mode-S transponder

4AC99A

ICAO 24-bit transponder address · allocated to Sweden

Currently assigned to SE-RLZ · HAWKER BEECHCRAFT Hawker 750/850

Hex
4AC99A
Octal
22544632
Decimal
4,901,274
Country
SE
Tail
SE-RLZ
Type
H25B
No current signal · last broadcast 4d ago
Flights observed
87
Distinct callsigns
1
Country
SE
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 4AC99A.

Country allocation

The ICAO 24-bit address 4AC99A 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
GFM7Z - 87 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 GFM7Z - Jul 10, 13:00 UTCJul 10, 13:50 UTC50m
2026-07-10 GFM7Z - Jul 10, 11:00 UTCJul 10, 11:40 UTC40m
2026-07-07 GFM7Z GVA → BMA Jul 7, 09:25 UTCJul 7, 11:50 UTC2h 25m
2026-07-05 GFM7Z - Jul 5, 15:30 UTCJul 5, 17:05 UTC1h 35m
2026-07-05 GFM7Z - Jul 5, 10:40 UTCJul 5, 14:10 UTC3h 30m
2026-07-04 GFM7Z BMA → BMA Jul 4, 07:05 UTCJul 4, 09:00 UTC1h 55m
2026-07-03 GFM7Z BMA → BMA Jul 3, 11:10 UTCJul 3, 12:55 UTC1h 45m
2026-07-03 GFM7Z - Jul 3, 09:40 UTCJul 3, 10:25 UTC45m
2026-07-03 GFM7Z - Jul 3, 08:10 UTCJul 3, 08:55 UTC45m
2026-07-02 GFM7Z - Jul 2, 14:35 UTCJul 2, 15:45 UTC1h 10m
2026-07-01 GFM7Z - Jul 1, 10:15 UTCJul 1, 11:15 UTC1h 0m
2026-06-29 GFM7Z - Jun 29, 13:34 UTCJun 29, 17:30 UTC3h 55m
2026-06-27 GFM7Z - Jun 27, 13:55 UTCJun 27, 14:54 UTC1h 0m
2026-06-27 GFM7Z BMA → IBZ Jun 27, 09:15 UTCJun 27, 12:55 UTC3h 40m
2026-06-26 GFM7Z - Jun 26, 12:29 UTCJun 26, 13:10 UTC40m
2026-06-26 GFM7Z - Jun 26, 11:09 UTCJun 26, 11:55 UTC45m
2026-06-25 GFM7Z ARN → BMA Jun 25, 15:40 UTCJun 25, 15:50 UTC10m
2026-06-25 GFM7Z - Jun 25, 13:05 UTCJun 25, 14:14 UTC1h 10m
2026-06-24 GFM7Z - Jun 24, 12:25 UTCJun 24, 13:00 UTC35m
2026-06-24 GFM7Z - Jun 24, 06:20 UTCJun 24, 06:39 UTC20m
2026-06-23 GFM7Z - Jun 23, 07:35 UTCJun 23, 08:15 UTC40m
2026-06-22 GFM7Z - Jun 22, 18:54 UTCJun 22, 19:34 UTC40m
2026-06-19 GFM7Z BMA → BMA Jun 19, 07:19 UTCJun 19, 08:29 UTC1h 10m
2026-06-18 GFM7Z - Jun 18, 18:20 UTCJun 18, 18:45 UTC25m
2026-06-18 GFM7Z - Jun 18, 15:15 UTCJun 18, 17:45 UTC2h 30m
2026-06-18 GFM7Z - Jun 18, 12:10 UTCJun 18, 14:10 UTC2h 0m
2026-06-18 GFM7Z - Jun 18, 06:10 UTCJun 18, 10:25 UTC4h 15m
2026-06-17 GFM7Z IBZ → BMA Jun 17, 06:45 UTCJun 17, 10:20 UTC3h 35m
2026-06-16 GFM7Z - Jun 16, 15:24 UTCJun 16, 16:20 UTC55m
2026-06-16 GFM7Z - Jun 16, 10:09 UTCJun 16, 14:05 UTC3h 55m
2026-06-15 GFM7Z ARN → BMA Jun 15, 08:20 UTCJun 15, 08:29 UTC10m
2026-06-12 GFM7Z - Jun 12, 23:00 UTCJun 12, 23:50 UTC50m
2026-06-12 GFM7Z - Jun 12, 17:45 UTCJun 12, 18:35 UTC50m
2026-06-12 GFM7Z - Jun 12, 14:55 UTCJun 12, 15:35 UTC40m
2026-06-11 GFM7Z - Jun 11, 08:50 UTCJun 11, 09:35 UTC45m
2026-06-10 GFM7Z MUC → BMA Jun 10, 16:15 UTCJun 10, 18:00 UTC1h 45m
2026-06-09 GFM7Z - Jun 9, 10:30 UTCJun 9, 11:35 UTC1h 5m
2026-06-09 GFM7Z - Jun 9, 08:35 UTCJun 9, 09:35 UTC1h 0m
2026-06-08 GFM7Z - Jun 8, 10:05 UTCJun 8, 13:30 UTC3h 25m
2026-06-08 GFM7Z ARN → BMA Jun 8, 08:05 UTCJun 8, 08:15 UTC10m
2026-06-07 GFM7Z NCE → ARN Jun 7, 22:15 UTCJun 8, 00:55 UTC2h 40m
2026-06-07 GFM7Z TRN → NCE Jun 7, 19:10 UTCJun 7, 19:40 UTC30m
2026-06-06 GFM7Z - Jun 6, 11:00 UTCJun 6, 11:30 UTC30m
2026-06-06 GFM7Z - Jun 6, 07:20 UTCJun 6, 10:09 UTC2h 50m
2026-06-05 GFM7Z - Jun 5, 14:20 UTCJun 5, 15:25 UTC1h 5m
2026-06-05 GFM7Z - Jun 5, 11:30 UTCJun 5, 12:55 UTC1h 25m
2026-06-05 GFM7Z - Jun 5, 07:15 UTCJun 5, 08:55 UTC1h 40m
2026-06-04 GFM7Z - Jun 4, 13:10 UTCJun 4, 14:25 UTC1h 15m
2026-06-03 GFM7Z - Jun 3, 16:05 UTCJun 3, 17:05 UTC1h 0m
2026-06-02 GFM7Z - Jun 2, 13:30 UTCJun 2, 15:10 UTC1h 40m

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 SE-RLZ page for operator, model, and routing details .

Mode-S 4AC99A frequently asked

What is Mode-S code 4AC99A?
4AC99A is an ICAO 24-bit transponder address. Allocated to Sweden. Assigned to SE-RLZ.
Where is Mode-S 4AC99A registered?
Mode-S code 4AC99A is allocated to Sweden (SE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4AC99A broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4AC99A, octal 22544632, decimal 4,901,274.
What flights does 4AC99A operate?
Mode-S 4AC99A has broadcast 1 distinct callsign, including GFM7Z.