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sensors Mode-S transponder

406F2B

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-RESU · AIRBUS HELICOPTERS EC-145

Hex
406F2B
Octal
20067453
Decimal
4,222,763
Country
GB
Tail
G-RESU
Type
EC45
No current signal · last broadcast 5d ago
Flights observed
213
Distinct callsigns
6
Country
GB
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S 406F2B.

Country allocation

The ICAO 24-bit address 406F2B 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 6 distinct

Callsign Airline Flights Last seen
HLE85 - 178 2026-07-22
HLE88 - 26 2026-07-26
RHD62 - 4 2026-07-23
RHD08 - 2 2026-05-02
RHD04 - 2 2026-04-29
RHD60 - 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HLE88 - Jul 26, 19:05 UTCJul 26, 19:25 UTC20m
2026-07-26 HLE88 - Jul 26, 17:45 UTCJul 26, 18:05 UTC20m
2026-07-26 HLE88 - Jul 26, 14:00 UTCJul 26, 14:25 UTC25m
2026-07-26 HLE88 - Jul 26, 12:40 UTCJul 26, 13:30 UTC50m
2026-07-26 HLE88 - Jul 26, 11:05 UTCJul 26, 11:15 UTC10m
2026-07-26 HLE88 - Jul 26, 09:05 UTCJul 26, 09:25 UTC20m
2026-07-25 HLE88 - Jul 25, 18:05 UTCJul 25, 18:25 UTC20m
2026-07-25 HLE88 - Jul 25, 16:50 UTCJul 25, 17:00 UTC10m
2026-07-25 HLE88 - Jul 25, 15:50 UTCJul 25, 16:15 UTC25m
2026-07-25 HLE88 - Jul 25, 14:15 UTCJul 25, 14:20 UTC5m
2026-07-25 HLE88 - Jul 25, 12:50 UTCJul 25, 13:30 UTC40m
2026-07-25 HLE88 - Jul 25, 11:45 UTCJul 25, 12:15 UTC30m
2026-07-24 HLE88 - Jul 24, 16:20 UTCJul 24, 17:40 UTC1h 20m
2026-07-24 HLE88 - Jul 24, 15:10 UTCJul 24, 15:25 UTC15m
2026-07-24 HLE88 - Jul 24, 10:45 UTCJul 24, 11:10 UTC25m
2026-07-24 HLE88 - Jul 24, 07:55 UTCJul 24, 08:20 UTC25m
2026-07-23 RHD62 - Jul 23, 07:35 UTCJul 23, 07:55 UTC20m
2026-07-22 HLE85 - Jul 22, 20:55 UTCJul 22, 21:35 UTC40m
2026-07-22 HLE85 - Jul 22, 16:55 UTCJul 22, 17:05 UTC10m
2026-07-22 HLE85 - Jul 22, 15:35 UTCJul 22, 15:45 UTC10m
2026-07-21 HLE85 - Jul 21, 21:30 UTCJul 21, 22:00 UTC30m
2026-07-21 HLE85 - Jul 21, 19:55 UTCJul 21, 20:15 UTC20m
2026-07-21 HLE85 - Jul 21, 18:50 UTCJul 21, 19:05 UTC15m
2026-07-21 HLE85 - Jul 21, 09:50 UTCJul 21, 10:00 UTC10m
2026-07-20 HLE85 - Jul 20, 17:45 UTCJul 20, 17:55 UTC10m
2026-07-20 HLE85 - Jul 20, 14:00 UTCJul 20, 14:10 UTC10m
2026-07-20 HLE85 - Jul 20, 12:10 UTCJul 20, 12:20 UTC10m
2026-07-20 HLE85 - Jul 20, 10:55 UTCJul 20, 11:15 UTC20m
2026-07-20 HLE85 - Jul 20, 10:10 UTCJul 20, 10:25 UTC15m
2026-07-19 HLE85 - Jul 19, 21:00 UTCJul 19, 21:50 UTC50m
2026-07-19 HLE85 - Jul 19, 16:50 UTCJul 19, 17:20 UTC30m
2026-07-19 HLE85 - Jul 19, 15:05 UTCJul 19, 15:25 UTC20m
2026-07-19 HLE85 - Jul 19, 13:35 UTCJul 19, 13:55 UTC20m
2026-07-19 RHD62 - Jul 19, 09:00 UTCJul 19, 10:15 UTC1h 15m
2026-07-18 RHD62 GLO → GLO Jul 18, 15:20 UTCJul 18, 15:50 UTC30m
2026-07-18 RHD62 GLO → GLO Jul 18, 12:00 UTCJul 18, 12:15 UTC15m
2026-06-17 HLE85 - Jun 17, 09:55 UTCJun 17, 10:15 UTC20m
2026-06-17 HLE85 - Jun 17, 00:15 UTCJun 17, 00:35 UTC20m
2026-06-16 HLE85 - Jun 16, 21:40 UTCJun 16, 22:10 UTC30m
2026-06-16 HLE85 - Jun 16, 19:10 UTCJun 16, 19:50 UTC41m
2026-06-16 HLE85 - Jun 16, 09:40 UTCJun 16, 10:30 UTC50m
2026-06-15 HLE85 - Jun 15, 23:45 UTCJun 15, 23:54 UTC10m
2026-06-15 HLE85 - Jun 15, 22:49 UTCJun 15, 23:09 UTC20m
2026-06-15 HLE85 - Jun 15, 21:04 UTCJun 15, 22:15 UTC1h 10m
2026-06-15 HLE85 NWI → NWI Jun 15, 19:10 UTCJun 15, 20:00 UTC50m
2026-06-15 HLE85 - Jun 15, 17:04 UTCJun 15, 17:45 UTC40m
2026-06-15 HLE85 - Jun 15, 10:55 UTCJun 15, 11:10 UTC15m
2026-06-15 HLE85 - Jun 15, 03:15 UTCJun 15, 03:30 UTC15m
2026-06-13 HLE85 - Jun 13, 14:00 UTCJun 13, 14:10 UTC10m
2026-06-13 HLE85 - Jun 13, 13:00 UTCJun 13, 13:15 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-RESU page for operator, model, and routing details .

Mode-S 406F2B frequently asked

What is Mode-S code 406F2B?
406F2B is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-RESU.
Where is Mode-S 406F2B registered?
Mode-S code 406F2B 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 406F2B 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 406F2B, octal 20067453, decimal 4,222,763.
What flights does 406F2B operate?
Mode-S 406F2B has broadcast 6 distinct callsigns, including HLE85, HLE88, RHD62, RHD08, RHD04.