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sensors Mode-S transponder

406F3E

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-NHAD · AEROSPATIALE AS-365 Dauphin 2

Hex
406F3E
Octal
20067476
Decimal
4,222,782
Country
GB
Tail
G-NHAD
Type
AS65
No current signal · last broadcast 1d ago
Flights observed
74
Distinct callsigns
1
Country
GB
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 406F3E.

Country allocation

The ICAO 24-bit address 406F3E 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
GNHAD - 73 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 GNHAD - Jul 16, 15:10 UTCJul 16, 15:30 UTC20m
2026-07-16 GNHAD - Jul 16, 11:50 UTCJul 16, 12:00 UTC10m
2026-07-15 GNHAD - Jul 15, 13:10 UTCJul 15, 13:20 UTC10m
2026-07-15 GNHAD - Jul 15, 12:15 UTCJul 15, 12:25 UTC10m
2026-07-15 GNHAD - Jul 15, 10:40 UTCJul 15, 10:50 UTC10m
2026-07-13 GNHAD - Jul 13, 14:40 UTCJul 13, 15:00 UTC20m
2026-07-11 GNHAD - Jul 11, 15:10 UTCJul 11, 15:30 UTC20m
2026-07-10 GNHAD - Jul 10, 16:25 UTCJul 10, 16:35 UTC10m
2026-07-10 GNHAD - Jul 10, 14:40 UTCJul 10, 14:50 UTC10m
2026-07-08 GNHAD - Jul 8, 16:10 UTCJul 8, 16:20 UTC10m
2026-07-08 GNHAD - Jul 8, 13:40 UTCJul 8, 13:50 UTC10m
2026-07-07 GNHAD - Jul 7, 17:40 UTCJul 7, 17:50 UTC10m
2026-07-05 GNHAD - Jul 5, 17:35 UTCJul 5, 17:50 UTC15m
2026-07-05 GNHAD - Jul 5, 15:05 UTCJul 5, 15:15 UTC10m
2026-07-05 GNHAD - Jul 5, 10:45 UTCJul 5, 10:55 UTC10m
2026-07-05 GNHAD - Jul 5, 08:50 UTCJul 5, 09:00 UTC10m
2026-07-04 GNHAD - Jul 4, 15:25 UTCJul 4, 15:35 UTC10m
2026-07-04 GNHAD - Jul 4, 12:45 UTCJul 4, 12:55 UTC10m
2026-07-04 GNHAD - Jul 4, 09:55 UTCJul 4, 10:10 UTC15m
2026-07-04 - - Jul 4, 07:50 UTCJul 4, 08:00 UTC10m
2026-07-03 GNHAD - Jul 3, 16:55 UTCJul 3, 17:05 UTC10m
2026-07-02 GNHAD - Jul 2, 10:45 UTCJul 2, 10:55 UTC10m
2026-06-30 GNHAD - Jun 30, 16:55 UTCJun 30, 17:05 UTC10m
2026-06-29 GNHAD - Jun 29, 14:44 UTCJun 29, 15:30 UTC45m
2026-06-28 GNHAD - Jun 28, 10:44 UTCJun 28, 11:09 UTC25m
2026-06-27 GNHAD - Jun 27, 13:44 UTCJun 27, 14:49 UTC1h 5m
2026-06-27 GNHAD - Jun 27, 12:19 UTCJun 27, 12:29 UTC10m
2026-06-26 GNHAD - Jun 26, 15:10 UTCJun 26, 15:39 UTC30m
2026-06-25 GNHAD LBA → MME Jun 25, 07:49 UTCJun 25, 08:09 UTC20m
2026-06-24 GNHAD - Jun 24, 18:34 UTCJun 24, 18:55 UTC20m
2026-06-23 GNHAD - Jun 23, 12:09 UTCJun 23, 12:40 UTC30m
2026-06-22 GNHAD - Jun 22, 15:20 UTCJun 22, 15:40 UTC20m
2026-06-22 GNHAD - Jun 22, 09:40 UTCJun 22, 10:49 UTC1h 10m
2026-06-20 GNHAD - Jun 20, 17:19 UTCJun 20, 17:29 UTC10m
2026-06-20 GNHAD - Jun 20, 13:14 UTCJun 20, 14:39 UTC1h 25m
2026-06-18 GNHAD - Jun 18, 10:50 UTCJun 18, 11:00 UTC10m
2026-06-17 GNHAD - Jun 17, 16:00 UTCJun 17, 16:45 UTC45m
2026-06-16 GNHAD - Jun 16, 20:10 UTCJun 16, 20:20 UTC10m
2026-06-16 GNHAD - Jun 16, 18:35 UTCJun 16, 18:50 UTC15m
2026-06-16 GNHAD - Jun 16, 08:49 UTCJun 16, 09:00 UTC10m
2026-06-14 GNHAD - Jun 14, 10:15 UTCJun 14, 10:30 UTC15m
2026-06-10 GNHAD - Jun 10, 09:55 UTCJun 10, 10:05 UTC10m
2026-06-08 GNHAD - Jun 8, 18:25 UTCJun 8, 18:35 UTC10m
2026-06-07 GNHAD - Jun 7, 11:40 UTCJun 7, 11:55 UTC15m
2026-06-07 GNHAD - Jun 7, 10:40 UTCJun 7, 10:50 UTC10m
2026-06-06 GNHAD - Jun 6, 18:39 UTCJun 6, 18:50 UTC10m
2026-06-04 GNHAD - Jun 4, 08:55 UTCJun 4, 09:15 UTC20m
2026-05-30 GNHAD - May 30, 17:10 UTCMay 30, 17:20 UTC10m
2026-05-30 GNHAD - May 30, 15:10 UTCMay 30, 15:20 UTC10m
2026-05-30 GNHAD - May 30, 09:45 UTCMay 30, 10:00 UTC15m

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

Mode-S 406F3E frequently asked

What is Mode-S code 406F3E?
406F3E is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-NHAD.
Where is Mode-S 406F3E registered?
Mode-S code 406F3E 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 406F3E 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 406F3E, octal 20067476, decimal 4,222,782.
What flights does 406F3E operate?
Mode-S 406F3E has broadcast 1 distinct callsign, including GNHAD.