Apparatus

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sensors Mode-S transponder

401983

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-AZRZ · CESSNA 206 Stationair

Hex
401983
Octal
20014603
Decimal
4,200,835
Country
GB
Tail
G-AZRZ
Type
C206
No current signal · last broadcast 1d ago
Flights observed
73
Distinct callsigns
1
Country
GB
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 401983.

Country allocation

The ICAO 24-bit address 401983 falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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
GAZRZ - 73 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-06 GAZRZ - Jul 6, 19:35 UTCJul 6, 19:50 UTC15m
2026-07-06 GAZRZ - Jul 6, 18:45 UTCJul 6, 19:00 UTC15m
2026-07-06 GAZRZ - Jul 6, 17:05 UTCJul 6, 18:05 UTC1h 0m
2026-07-06 GAZRZ - Jul 6, 16:00 UTCJul 6, 16:20 UTC20m
2026-07-06 GAZRZ - Jul 6, 14:35 UTCJul 6, 15:00 UTC25m
2026-07-03 GAZRZ - Jul 3, 15:45 UTCJul 3, 16:45 UTC1h 0m
2026-07-03 GAZRZ - Jul 3, 14:55 UTCJul 3, 15:15 UTC20m
2026-07-03 GAZRZ - Jul 3, 11:15 UTCJul 3, 14:10 UTC2h 55m
2026-07-03 GAZRZ - Jul 3, 10:25 UTCJul 3, 10:40 UTC15m
2026-07-03 GAZRZ - Jul 3, 08:05 UTCJul 3, 08:15 UTC10m
2026-06-28 GAZRZ - Jun 28, 16:00 UTCJun 28, 16:25 UTC25m
2026-06-28 GAZRZ - Jun 28, 15:14 UTCJun 28, 15:29 UTC15m
2026-06-28 GAZRZ - Jun 28, 13:55 UTCJun 28, 14:39 UTC45m
2026-06-28 GAZRZ - Jun 28, 13:00 UTCJun 28, 13:19 UTC20m
2026-06-28 GAZRZ - Jun 28, 08:50 UTCJun 28, 12:15 UTC3h 25m
2026-06-26 GAZRZ - Jun 26, 17:15 UTCJun 26, 17:35 UTC20m
2026-06-26 GAZRZ - Jun 26, 16:44 UTCJun 26, 17:00 UTC15m
2026-06-26 GAZRZ - Jun 26, 15:39 UTCJun 26, 16:00 UTC20m
2026-06-26 GAZRZ - Jun 26, 12:44 UTCJun 26, 12:55 UTC10m
2026-06-26 GAZRZ - Jun 26, 11:05 UTCJun 26, 12:10 UTC1h 5m
2026-06-23 GAZRZ - Jun 23, 17:30 UTCJun 23, 18:45 UTC1h 15m
2026-06-23 GAZRZ - Jun 23, 15:55 UTCJun 23, 16:54 UTC1h 0m
2026-06-23 GAZRZ - Jun 23, 14:55 UTCJun 23, 15:19 UTC25m
2026-06-23 GAZRZ - Jun 23, 12:55 UTCJun 23, 14:04 UTC1h 10m
2026-06-23 GAZRZ - Jun 23, 11:19 UTCJun 23, 12:25 UTC1h 5m
2026-06-22 GAZRZ - Jun 22, 12:30 UTCJun 22, 12:44 UTC15m
2026-06-22 GAZRZ - Jun 22, 10:34 UTCJun 22, 11:00 UTC25m
2026-06-21 GAZRZ - Jun 21, 18:35 UTCJun 21, 19:00 UTC25m
2026-06-21 GAZRZ - Jun 21, 13:44 UTCJun 21, 18:00 UTC4h 15m
2026-06-21 GAZRZ - Jun 21, 10:09 UTCJun 21, 13:09 UTC3h 0m
2026-06-21 GAZRZ - Jun 21, 08:40 UTCJun 21, 09:35 UTC55m
2026-06-20 GAZRZ - Jun 20, 18:24 UTCJun 20, 18:49 UTC25m
2026-06-20 GAZRZ - Jun 20, 17:29 UTCJun 20, 17:49 UTC20m
2026-06-20 GAZRZ - Jun 20, 16:34 UTCJun 20, 16:55 UTC20m
2026-06-20 GAZRZ - Jun 20, 15:34 UTCJun 20, 15:54 UTC20m
2026-06-20 GAZRZ - Jun 20, 14:44 UTCJun 20, 14:59 UTC15m
2026-06-13 GAZRZ - Jun 13, 17:40 UTCJun 13, 18:00 UTC20m
2026-06-13 GAZRZ - Jun 13, 15:00 UTCJun 13, 16:45 UTC1h 45m
2026-06-13 GAZRZ - Jun 13, 13:20 UTCJun 13, 14:15 UTC55m
2026-06-13 GAZRZ - Jun 13, 12:30 UTCJun 13, 12:45 UTC15m
2026-06-13 GAZRZ - Jun 13, 09:10 UTCJun 13, 09:35 UTC25m
2026-05-31 GAZRZ - May 31, 15:20 UTCMay 31, 15:45 UTC25m
2026-05-31 GAZRZ - May 31, 14:00 UTCMay 31, 14:30 UTC30m
2026-05-31 GAZRZ - May 31, 12:25 UTCMay 31, 13:25 UTC1h 0m
2026-05-31 GAZRZ - May 31, 11:15 UTCMay 31, 11:40 UTC25m
2026-05-31 GAZRZ - May 31, 10:10 UTCMay 31, 10:30 UTC20m
2026-05-31 GAZRZ - May 31, 09:10 UTCMay 31, 09:30 UTC20m
2026-05-30 GAZRZ - May 30, 15:15 UTCMay 30, 15:30 UTC15m
2026-05-30 GAZRZ - May 30, 14:10 UTCMay 30, 14:30 UTC20m
2026-05-30 GAZRZ - May 30, 13:00 UTCMay 30, 13:20 UTC20m

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 G-AZRZ page for operator, model, and routing details .

Mode-S 401983 frequently asked

What is Mode-S code 401983?
401983 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-AZRZ.
Where is Mode-S 401983 registered?
Mode-S code 401983 is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 401983 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 401983, octal 20014603, decimal 4,200,835.
What flights does 401983 operate?
Mode-S 401983 has broadcast 1 distinct callsign, including GAZRZ.