Apparatus

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sensors Mode-S transponder

4404DB

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-FRM · CESSNA 510 Citation Mustang

Hex
4404DB
Octal
21002333
Decimal
4,457,691
Country
AT
Tail
OE-FRM
Type
C510
No current signal · last broadcast 34m ago
Flights observed
136
Distinct callsigns
20
Country
AT
Last broadcast
34m ago

Last known position

Most recent position reported by Mode-S 4404DB.

Country allocation

The ICAO 24-bit address 4404DB falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria 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
GAC768Z - 2 2026-05-07
GAC751N - 2 2026-05-02
GAC706K - 2 2026-05-06
GAC401N - 2 2026-05-19
GAC042C - 2 2026-05-10
GAC997Z - 1 2026-05-20
GAC992P - 1 2026-05-24
GAC992N - 1 2026-05-23
GAC976N - 1 2026-05-29
GAC968Y - 1 2026-05-22
GAC968X - 1 2026-05-22
GAC964N - 1 2026-06-16
GAC963M - 1 2026-05-23
GAC958V - 1 2026-06-06
GAC947Y - 1 2026-05-11
GAC946M - 1 2026-06-08
GAC939T - 1 2026-05-17
GAC930G - 1 2026-06-02
GAC920N - 1 2026-06-14
GAC918K - 1 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-16 GAC881V - Jun 16, 17:05 UTCJun 16, 18:35 UTC1h 30m
2026-06-16 GAC003S - Jun 16, 14:35 UTCJun 16, 15:40 UTC1h 5m
2026-06-16 GAC742Q - Jun 16, 11:00 UTCJun 16, 11:55 UTC55m
2026-06-16 GAC964N - Jun 16, 08:49 UTCJun 16, 09:40 UTC50m
2026-06-15 GAC311K - Jun 15, 17:15 UTCJun 15, 18:10 UTC55m
2026-06-15 GAC422K - Jun 15, 14:30 UTCJun 15, 15:00 UTC30m
2026-06-14 GAC819P STR → CIA Jun 14, 17:10 UTCJun 14, 18:35 UTC1h 25m
2026-06-14 GAC920N - Jun 14, 14:25 UTCJun 14, 15:15 UTC50m
2026-06-14 GAC275Q - Jun 14, 12:20 UTCJun 14, 13:20 UTC1h 0m
2026-06-14 GAC392B - Jun 14, 09:15 UTCJun 14, 11:10 UTC1h 55m
2026-06-14 GAC583Y - Jun 14, 07:35 UTCJun 14, 08:20 UTC45m
2026-06-13 GAC694X - Jun 13, 10:45 UTCJun 13, 11:35 UTC50m
2026-06-13 GAC820J - Jun 13, 07:05 UTCJun 13, 08:35 UTC1h 30m
2026-06-13 GAC042F - Jun 13, 04:20 UTCJun 13, 05:35 UTC1h 15m
2026-06-12 GAC231T - Jun 12, 12:10 UTCJun 12, 13:45 UTC1h 35m
2026-06-12 GAC342S - Jun 12, 10:00 UTCJun 12, 10:50 UTC50m
2026-06-11 GAC710V STR → SZG Jun 11, 18:10 UTCJun 11, 18:45 UTC35m
2026-06-11 GAC710U - Jun 11, 05:00 UTCJun 11, 05:40 UTC40m
2026-06-10 GAC821T VIE → SZG Jun 10, 15:00 UTCJun 10, 15:40 UTC40m
2026-06-10 GAC046H - Jun 10, 12:45 UTCJun 10, 13:55 UTC1h 10m
2026-06-10 GAC379C - Jun 10, 10:20 UTCJun 10, 11:40 UTC1h 20m
2026-06-09 GAC345W NCE → LIN Jun 9, 14:25 UTCJun 9, 15:00 UTC35m
2026-06-09 GAC456V - Jun 9, 10:50 UTCJun 9, 13:15 UTC2h 25m
2026-06-09 GAC807K - Jun 9, 09:00 UTCJun 9, 09:45 UTC45m
2026-06-09 GAC918K VIE → BRE Jun 9, 06:15 UTCJun 9, 07:50 UTC1h 35m
2026-06-08 GAC835M - Jun 8, 16:50 UTCJun 8, 18:40 UTC1h 50m
2026-06-08 GAC946M - Jun 8, 13:40 UTCJun 8, 14:45 UTC1h 5m
2026-06-08 GAC626C - Jun 8, 10:50 UTCJun 8, 12:35 UTC1h 45m
2026-06-07 GAC848Z - Jun 7, 13:20 UTCJun 7, 14:35 UTC1h 15m
2026-06-07 GAC592Q LYN → LUX Jun 7, 10:55 UTCJun 7, 11:55 UTC1h 0m
2026-06-07 GAC603P - Jun 7, 08:05 UTCJun 7, 09:35 UTC1h 30m
2026-06-06 GAC958V - Jun 6, 14:00 UTCJun 6, 14:40 UTC40m
2026-06-06 GAC069U - Jun 6, 11:09 UTCJun 6, 12:10 UTC1h 0m
2026-06-05 GAC339X - Jun 5, 07:25 UTCJun 5, 09:55 UTC2h 30m
2026-06-04 GAC440W - Jun 4, 15:30 UTCJun 4, 17:20 UTC1h 50m
2026-06-04 GAC726J - Jun 4, 13:10 UTCJun 4, 13:55 UTC45m
2026-06-04 GAC837J - Jun 4, 09:50 UTCJun 4, 12:00 UTC2h 10m
2026-06-03 GAC695Y NCE → CIA Jun 3, 16:20 UTCJun 3, 17:15 UTC55m
2026-06-03 GAC706X - Jun 3, 14:05 UTCJun 3, 14:55 UTC50m
2026-06-03 GAC575D - Jun 3, 10:50 UTCJun 3, 12:15 UTC1h 25m
2026-06-03 GAC686C - Jun 3, 08:20 UTCJun 3, 09:50 UTC1h 30m
2026-06-02 GAC930G - Jun 2, 17:35 UTCJun 2, 18:35 UTC1h 0m
2026-06-02 GAC041F PRG → GVA Jun 2, 14:30 UTCJun 2, 16:20 UTC1h 50m
2026-06-02 GAC149G - Jun 2, 11:40 UTCJun 2, 13:15 UTC1h 35m
2026-06-01 GAC250F GVA → LBG Jun 1, 13:45 UTCJun 1, 14:40 UTC55m
2026-06-01 GAC719J - Jun 1, 10:05 UTCJun 1, 11:50 UTC1h 45m
2026-06-01 GAC153B - Jun 1, 07:20 UTCJun 1, 08:45 UTC1h 25m
2026-05-31 GAC640D - May 31, 16:45 UTCMay 31, 18:05 UTC1h 20m
2026-05-31 GAC310K - May 31, 12:25 UTCMay 31, 13:40 UTC1h 15m
2026-05-31 GAC453T MAD → IBZ May 31, 10:25 UTCMay 31, 11:25 UTC1h 0m

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 OE-FRM page for operator, model, and routing details .

Mode-S 4404DB frequently asked

What is Mode-S code 4404DB?
4404DB is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-FRM.
Where is Mode-S 4404DB registered?
Mode-S code 4404DB is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4404DB broadcasting right now?
No active broadcast right now. Last signal was 34m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4404DB, octal 21002333, decimal 4,457,691.
What flights does 4404DB operate?
Mode-S 4404DB has broadcast 20 distinct callsigns, including GAC768Z, GAC751N, GAC706K, GAC401N, GAC042C.