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 5d ago
Flights observed
241
Distinct callsigns
20
Country
AT
Last broadcast
5d 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
GAC936N - 2 2026-07-20
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
GAC995P - 1 2026-07-02
GAC992P - 1 2026-05-24
GAC992N - 1 2026-05-23
GAC985Y - 1 2026-07-17
GAC978E - 1 2026-06-20
GAC976N - 1 2026-05-29
GAC972S - 1 2026-07-07
GAC969V - 1 2026-07-01
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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GAC949X BUD → GVA Jul 26, 17:50 UTCJul 26, 19:50 UTC2h 0m
2026-07-26 GAC161U NUE → BUD Jul 26, 12:45 UTCJul 26, 14:05 UTC1h 20m
2026-07-26 GAC621X - Jul 26, 10:20 UTCJul 26, 11:35 UTC1h 15m
2026-07-25 GAC817P - Jul 25, 09:30 UTCJul 25, 11:35 UTC2h 5m
2026-07-24 GAC928N - Jul 24, 15:45 UTCJul 24, 17:10 UTC1h 25m
2026-07-24 GAC388R - Jul 24, 12:20 UTCJul 24, 14:05 UTC1h 45m
2026-07-23 GAC499Q - Jul 23, 18:15 UTCJul 23, 20:10 UTC1h 55m
2026-07-23 GAC843J - Jul 23, 15:35 UTCJul 23, 17:20 UTC1h 45m
2026-07-23 GAC954J - Jul 23, 13:25 UTCJul 23, 14:30 UTC1h 5m
2026-07-23 GAC550H - Jul 23, 10:45 UTCJul 23, 12:05 UTC1h 20m
2026-07-22 GAC911K - Jul 22, 15:15 UTCJul 22, 16:15 UTC1h 0m
2026-07-22 GAC022K - Jul 22, 12:35 UTCJul 22, 13:45 UTC1h 10m
2026-07-21 GAC503X - Jul 21, 14:45 UTCJul 21, 16:35 UTC1h 50m
2026-07-21 GAC614W - Jul 21, 11:30 UTCJul 21, 12:20 UTC50m
2026-07-21 GAC825N - Jul 21, 09:15 UTCJul 21, 10:05 UTC50m
2026-07-20 GAC936N - Jul 20, 20:55 UTCJul 20, 21:10 UTC15m
2026-07-20 GAC936N ZRH → LUX Jul 20, 16:50 UTCJul 20, 17:40 UTC50m
2026-07-20 GAC657V - Jul 20, 14:25 UTCJul 20, 15:55 UTC1h 30m
2026-07-20 GAC879S - Jul 20, 10:05 UTCJul 20, 10:45 UTC40m
2026-07-20 GAC407Z - Jul 20, 07:55 UTCJul 20, 09:00 UTC1h 5m
2026-07-19 GAC518Y - Jul 19, 12:05 UTCJul 19, 13:15 UTC1h 10m
2026-07-19 GAC895S ANR → MAN Jul 19, 09:15 UTCJul 19, 10:30 UTC1h 15m
2026-07-19 GAC906Q - Jul 19, 06:30 UTCJul 19, 08:20 UTC1h 50m
2026-07-18 GAC576G LBG → CEQ Jul 18, 14:30 UTCJul 18, 16:00 UTC1h 30m
2026-07-18 GAC687F BOD → LBG Jul 18, 11:15 UTCJul 18, 12:20 UTC1h 5m
2026-07-18 GAC761A - Jul 18, 08:20 UTCJul 18, 10:20 UTC2h 0m
2026-07-18 GAC872Z - Jul 18, 06:20 UTCJul 18, 07:05 UTC45m
2026-07-17 GAC874Z - Jul 17, 13:10 UTCJul 17, 14:00 UTC50m
2026-07-17 GAC985Y - Jul 17, 09:20 UTCJul 17, 10:05 UTC45m
2026-07-17 GAC240T - Jul 17, 06:10 UTCJul 17, 07:20 UTC1h 10m
2026-07-17 GAC351S - Jul 17, 04:04 UTCJul 17, 05:04 UTC1h 0m
2026-07-16 GAC818B - Jul 16, 14:05 UTCJul 16, 16:05 UTC2h 0m
2026-07-16 GAC052K - Jul 16, 10:45 UTCJul 16, 12:34 UTC1h 50m
2026-07-16 GAC274H - Jul 16, 08:10 UTCJul 16, 09:20 UTC1h 10m
2026-07-15 GAC830A - Jul 15, 14:50 UTCJul 15, 15:45 UTC55m
2026-07-15 GAC261W - Jul 15, 07:20 UTCJul 15, 08:15 UTC55m
2026-07-15 GAC372V - Jul 15, 05:05 UTCJul 15, 06:30 UTC1h 25m
2026-07-14 GAC055U - Jul 14, 10:05 UTCJul 14, 10:45 UTC40m
2026-07-14 GAC166T - Jul 14, 08:00 UTCJul 14, 09:15 UTC1h 15m
2026-07-13 GAC122Z - Jul 13, 13:30 UTCJul 13, 14:55 UTC1h 25m
2026-07-13 GAC233Y NUE → ZRH Jul 13, 11:35 UTCJul 13, 12:20 UTC45m
2026-07-12 GAC319G - Jul 12, 17:01 UTCJul 12, 17:55 UTC55m
2026-07-12 GAC531D BDS → VIE Jul 12, 14:40 UTCJul 12, 16:20 UTC1h 40m
2026-07-12 GAC658A - Jul 12, 12:15 UTCJul 12, 13:50 UTC1h 35m
2026-07-11 GAC416Y - Jul 11, 15:00 UTCJul 11, 16:40 UTC1h 40m
2026-07-11 GAC638V - Jul 11, 11:35 UTCJul 11, 13:15 UTC1h 40m
2026-07-11 GAC017H - Jul 11, 09:15 UTCJul 11, 10:30 UTC1h 15m
2026-07-10 GAC128G CGN → MST Jul 10, 13:40 UTCJul 10, 13:55 UTC15m
2026-07-10 GAC255W - Jul 10, 11:00 UTCJul 10, 12:15 UTC1h 15m
2026-07-10 GAC477T - Jul 10, 07:50 UTCJul 10, 09:15 UTC1h 25m

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 5d 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 GAC936N, GAC768Z, GAC751N, GAC706K, GAC401N.