Apparatus

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sensors Mode-S transponder

407F76

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-LAAA · AIRBUS HELICOPTERS EC-135/635

Hex
407F76
Octal
20077566
Decimal
4,226,934
Country
GB
Tail
G-LAAA
Type
EC35
No current signal · last broadcast 15d ago
Flights observed
376
Distinct callsigns
2
Country
GB
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S 407F76.

Country allocation

The ICAO 24-bit address 407F76 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 2 distinct

Callsign Airline Flights Last seen
HLE27 - 350 2026-06-27
HLE28 - 26 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-29 HLE28 NHT → OXF Jun 29, 12:45 UTCJun 29, 13:09 UTC25m
2026-06-27 HLE27 - Jun 27, 20:34 UTCJun 27, 20:44 UTC10m
2026-06-27 HLE27 - Jun 27, 20:19 UTCJun 27, 20:29 UTC10m
2026-06-27 HLE27 - Jun 27, 14:45 UTCJun 27, 14:49 UTC5m
2026-06-27 HLE27 - Jun 27, 13:20 UTCJun 27, 13:35 UTC15m
2026-06-27 HLE27 - Jun 27, 11:20 UTCJun 27, 11:30 UTC10m
2026-06-27 HLE27 - Jun 27, 09:50 UTCJun 27, 10:10 UTC20m
2026-06-27 HLE27 - Jun 27, 08:20 UTCJun 27, 08:55 UTC35m
2026-06-27 HLE27 - Jun 27, 07:15 UTCJun 27, 07:24 UTC10m
2026-06-26 HLE27 - Jun 26, 20:55 UTCJun 26, 21:04 UTC10m
2026-06-26 HLE27 - Jun 26, 18:49 UTCJun 26, 19:30 UTC40m
2026-06-26 HLE27 - Jun 26, 17:00 UTCJun 26, 17:09 UTC10m
2026-06-26 HLE27 - Jun 26, 15:49 UTCJun 26, 16:30 UTC40m
2026-06-26 HLE27 - Jun 26, 14:55 UTCJun 26, 15:05 UTC10m
2026-06-26 HLE27 - Jun 26, 10:44 UTCJun 26, 11:49 UTC1h 5m
2026-06-26 HLE27 - Jun 26, 09:10 UTCJun 26, 09:55 UTC45m
2026-06-26 HLE27 - Jun 26, 08:50 UTCJun 26, 08:54 UTC5m
2026-06-26 HLE27 - Jun 26, 08:00 UTCJun 26, 08:10 UTC10m
2026-06-25 HLE27 - Jun 25, 20:30 UTCJun 25, 20:45 UTC15m
2026-06-25 HLE27 - Jun 25, 20:09 UTCJun 25, 20:19 UTC10m
2026-06-25 HLE27 - Jun 25, 19:05 UTCJun 25, 19:15 UTC10m
2026-06-25 HLE27 - Jun 25, 18:45 UTCJun 25, 18:50 UTC5m
2026-06-25 HLE27 - Jun 25, 18:24 UTCJun 25, 18:29 UTC5m
2026-06-25 HLE27 - Jun 25, 18:10 UTCJun 25, 18:19 UTC10m
2026-06-25 HLE27 - Jun 25, 16:55 UTCJun 25, 17:09 UTC15m
2026-06-25 HLE27 - Jun 25, 14:44 UTCJun 25, 14:59 UTC15m
2026-06-25 HLE27 - Jun 25, 13:45 UTCJun 25, 14:09 UTC25m
2026-06-25 HLE27 - Jun 25, 12:25 UTCJun 25, 12:35 UTC10m
2026-06-25 HLE27 - Jun 25, 12:10 UTCJun 25, 12:19 UTC10m
2026-06-25 HLE27 - Jun 25, 11:35 UTCJun 25, 11:39 UTC5m
2026-06-25 HLE27 - Jun 25, 09:55 UTCJun 25, 10:04 UTC10m
2026-06-25 HLE27 - Jun 25, 07:25 UTCJun 25, 07:34 UTC10m
2026-06-21 HLE27 - Jun 21, 20:29 UTCJun 21, 20:40 UTC10m
2026-06-21 HLE27 - Jun 21, 18:50 UTCJun 21, 19:24 UTC35m
2026-06-21 HLE27 - Jun 21, 17:24 UTCJun 21, 17:29 UTC5m
2026-06-21 HLE27 - Jun 21, 16:59 UTCJun 21, 17:05 UTC5m
2026-06-21 HLE27 - Jun 21, 16:10 UTCJun 21, 16:19 UTC10m
2026-06-21 HLE27 - Jun 21, 15:09 UTCJun 21, 15:15 UTC5m
2026-06-21 HLE27 - Jun 21, 12:55 UTCJun 21, 13:00 UTC5m
2026-06-21 HLE27 - Jun 21, 11:49 UTCJun 21, 11:59 UTC10m
2026-06-21 HLE27 - Jun 21, 11:24 UTCJun 21, 11:30 UTC5m
2026-06-21 HLE27 - Jun 21, 09:44 UTCJun 21, 09:55 UTC10m
2026-06-20 HLE27 - Jun 20, 20:49 UTCJun 20, 21:00 UTC10m
2026-06-20 HLE27 - Jun 20, 20:34 UTCJun 20, 20:45 UTC10m
2026-06-20 HLE27 - Jun 20, 19:04 UTCJun 20, 19:49 UTC45m
2026-06-20 HLE27 - Jun 20, 18:14 UTCJun 20, 18:49 UTC35m
2026-06-20 HLE27 - Jun 20, 15:09 UTCJun 20, 15:14 UTC5m
2026-06-20 HLE27 - Jun 20, 13:29 UTCJun 20, 13:39 UTC10m
2026-06-20 HLE27 - Jun 20, 12:30 UTCJun 20, 12:39 UTC10m
2026-06-20 HLE27 - Jun 20, 11:59 UTCJun 20, 12:04 UTC5m

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

Mode-S 407F76 frequently asked

What is Mode-S code 407F76?
407F76 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-LAAA.
Where is Mode-S 407F76 registered?
Mode-S code 407F76 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 407F76 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407F76, octal 20077566, decimal 4,226,934.
What flights does 407F76 operate?
Mode-S 407F76 has broadcast 2 distinct callsigns, including HLE27, HLE28.