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sensors Mode-S transponder

44020B

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-HGL · BOMBARDIER BD-100 Challenger 350

Hex
44020B
Octal
21001013
Decimal
4,456,971
Country
AT
Tail
OE-HGL
Type
CL35
No current signal · last broadcast Jul 26, 15:40 UTC
Flights observed
199
Distinct callsigns
2
Country
AT
Last broadcast
Jul 26, 15:40 UTC

Last known position

Most recent position reported by Mode-S 44020B.

Country allocation

The ICAO 24-bit address 44020B 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 2 distinct

Callsign Airline Flights Last seen
GCK29 - 187 2026-07-26
GCK029 - 12 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GCK29 LBG → GVA Jul 26, 14:55 UTCJul 26, 15:35 UTC40m
2026-07-26 GCK29 - Jul 26, 10:35 UTCJul 26, 14:15 UTC3h 40m
2026-07-25 GCK29 - Jul 25, 16:55 UTCJul 25, 17:25 UTC30m
2026-07-25 GCK29 - Jul 25, 14:30 UTCJul 25, 15:30 UTC1h 0m
2026-07-25 GCK29 - Jul 25, 10:25 UTCJul 25, 13:15 UTC2h 50m
2026-07-25 GCK29 VIE → LIN Jul 25, 07:30 UTCJul 25, 08:25 UTC55m
2026-07-21 GCK29 ATH → VIE Jul 21, 14:20 UTCJul 21, 16:20 UTC2h 0m
2026-07-21 GCK29 - Jul 21, 10:00 UTCJul 21, 12:05 UTC2h 5m
2026-07-21 GCK29 NCE → GVA Jul 21, 08:45 UTCJul 21, 09:50 UTC1h 5m
2026-07-21 GCK29 ATH → NCE Jul 21, 05:20 UTCJul 21, 07:40 UTC2h 20m
2026-07-20 GCK29 DBV → ATH Jul 20, 15:45 UTCJul 20, 16:45 UTC1h 0m
2026-07-20 GCK29 BEG → DBV Jul 20, 14:00 UTCJul 20, 14:35 UTC35m
2026-07-19 GCK029 ATH → BEG Jul 19, 14:50 UTCJul 19, 16:00 UTC1h 10m
2026-07-19 GCK029 - Jul 19, 11:35 UTCJul 19, 13:25 UTC1h 50m
2026-07-19 GCK029 - Jul 19, 09:15 UTCJul 19, 09:40 UTC25m
2026-07-19 GCK029 BCN → NCE Jul 19, 07:20 UTCJul 19, 08:05 UTC45m
2026-07-18 GCK029 - Jul 18, 10:15 UTCJul 18, 10:45 UTC30m
2026-07-18 GCK29 - Jul 18, 08:25 UTCJul 18, 09:40 UTC1h 15m
2026-07-18 GCK29 - Jul 18, 04:45 UTCJul 18, 06:55 UTC2h 10m
2026-07-17 GCK29 - Jul 17, 11:30 UTCJul 17, 13:10 UTC1h 40m
2026-07-17 GCK29 - Jul 17, 08:15 UTCJul 17, 09:55 UTC1h 40m
2026-07-16 GCK029 - Jul 16, 12:09 UTCJul 16, 15:25 UTC3h 15m
2026-07-16 GCK029 - Jul 16, 08:45 UTCJul 16, 10:25 UTC1h 40m
2026-07-15 GCK29 - Jul 15, 13:15 UTCJul 15, 13:40 UTC25m
2026-07-15 GCK29 - Jul 15, 05:35 UTCJul 15, 06:00 UTC25m
2026-07-14 GCK29 - Jul 14, 11:15 UTCJul 14, 13:05 UTC1h 50m
2026-07-14 GCK29 NCE → ATH Jul 14, 08:00 UTCJul 14, 10:00 UTC2h 0m
2026-07-13 GCK29 ATH → NCE Jul 13, 16:15 UTCJul 13, 18:30 UTC2h 15m
2026-07-13 GCK29 NCE → ATH Jul 13, 13:00 UTCJul 13, 14:50 UTC1h 50m
2026-07-13 GCK29 VIE → NCE Jul 13, 09:25 UTCJul 13, 10:50 UTC1h 25m
2026-07-13 GCK29 - Jul 13, 05:01 UTCJul 13, 05:25 UTC25m
2026-07-10 GCK29 - Jul 10, 16:55 UTCJul 10, 17:40 UTC45m
2026-07-10 GCK29 - Jul 10, 14:50 UTCJul 10, 16:30 UTC1h 40m
2026-07-10 GCK29 - Jul 10, 07:00 UTCJul 10, 08:20 UTC1h 20m
2026-07-09 GCK29 - Jul 9, 17:10 UTCJul 9, 18:25 UTC1h 15m
2026-07-09 GCK29 - Jul 9, 14:05 UTCJul 9, 15:15 UTC1h 10m
2026-07-08 GCK29 - Jul 8, 14:05 UTCJul 8, 16:30 UTC2h 25m
2026-07-08 GCK29 - Jul 8, 10:30 UTCJul 8, 11:35 UTC1h 5m
2026-07-08 GCK29 - Jul 8, 08:05 UTCJul 8, 09:20 UTC1h 15m
2026-07-07 GCK29 - Jul 7, 09:05 UTCJul 7, 10:10 UTC1h 5m
2026-07-07 GCK29 - Jul 7, 06:55 UTCJul 7, 08:05 UTC1h 10m
2026-07-06 GCK29 - Jul 6, 11:40 UTCJul 6, 12:15 UTC35m
2026-07-06 GCK29 FAB → PSA Jul 6, 09:15 UTCJul 6, 10:50 UTC1h 35m
2026-07-05 GCK29 - Jul 5, 16:05 UTCJul 5, 16:55 UTC50m
2026-07-05 GCK29 - Jul 5, 12:55 UTCJul 5, 14:05 UTC1h 10m
2026-07-05 GCK29 - Jul 5, 09:25 UTCJul 5, 10:25 UTC1h 0m
2026-07-04 GCK29 - Jul 4, 10:15 UTCJul 4, 11:10 UTC55m
2026-07-04 GCK29 - Jul 4, 07:40 UTCJul 4, 09:25 UTC1h 45m
2026-07-04 GCK29 KLU → INN Jul 4, 05:55 UTCJul 4, 06:20 UTC25m
2026-07-03 GCK29 - Jul 3, 11:25 UTCJul 3, 11:55 UTC30m

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-HGL page for operator, model, and routing details .

Mode-S 44020B frequently asked

What is Mode-S code 44020B?
44020B is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-HGL.
Where is Mode-S 44020B registered?
Mode-S code 44020B is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 44020B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 44020B, octal 21001013, decimal 4,456,971.
What flights does 44020B operate?
Mode-S 44020B has broadcast 2 distinct callsigns, including GCK29, GCK029.