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sensors Mode-S transponder

407F9C

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-ESKR · BEST OFF Sky Ranger

Hex
407F9C
Octal
20077634
Decimal
4,226,972
Country
GB
Tail
G-ESKR
Type
SKRA
No current signal · last broadcast 2d ago
Flights observed
122
Distinct callsigns
1
Country
GB
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 407F9C.

Country allocation

The ICAO 24-bit address 407F9C 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
GESKR - 122 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 GESKR ORM → ORM Jul 11, 10:20 UTCJul 11, 11:10 UTC50m
2026-07-11 GESKR ORM → ORM Jul 11, 07:05 UTCJul 11, 07:55 UTC50m
2026-07-10 GESKR - Jul 10, 16:40 UTCJul 10, 17:25 UTC45m
2026-07-10 GESKR ORM → ORM Jul 10, 14:35 UTCJul 10, 15:15 UTC40m
2026-07-09 GESKR - Jul 9, 14:50 UTCJul 9, 15:30 UTC40m
2026-07-09 GESKR - Jul 9, 12:50 UTCJul 9, 13:50 UTC1h 0m
2026-07-09 GESKR ORM → ORM Jul 9, 10:20 UTCJul 9, 11:10 UTC50m
2026-07-09 GESKR - Jul 9, 08:40 UTCJul 9, 09:30 UTC50m
2026-07-08 GESKR ORM → ORM Jul 8, 15:20 UTCJul 8, 16:10 UTC50m
2026-07-08 GESKR ORM → ORM Jul 8, 13:05 UTCJul 8, 13:55 UTC50m
2026-07-08 GESKR ORM → ORM Jul 8, 10:40 UTCJul 8, 11:35 UTC55m
2026-07-08 GESKR - Jul 8, 08:55 UTCJul 8, 09:40 UTC45m
2026-07-05 GESKR - Jul 5, 10:45 UTCJul 5, 11:35 UTC50m
2026-07-03 GESKR ORM → ORM Jul 3, 14:40 UTCJul 3, 15:25 UTC45m
2026-07-03 GESKR - Jul 3, 12:40 UTCJul 3, 13:30 UTC50m
2026-07-03 GESKR ORM → ORM Jul 3, 10:40 UTCJul 3, 11:35 UTC55m
2026-07-03 GESKR ORM → ORM Jul 3, 08:35 UTCJul 3, 09:35 UTC1h 0m
2026-07-02 GESKR - Jul 2, 10:35 UTCJul 2, 11:30 UTC55m
2026-07-02 GESKR - Jul 2, 09:15 UTCJul 2, 10:05 UTC50m
2026-07-02 GESKR ORM → ORM Jul 2, 07:45 UTCJul 2, 08:40 UTC55m
2026-07-01 GESKR ORM → ORM Jul 1, 10:45 UTCJul 1, 11:35 UTC50m
2026-07-01 GESKR ORM → ORM Jul 1, 08:50 UTCJul 1, 09:35 UTC45m
2026-06-30 GESKR - Jun 30, 10:55 UTCJun 30, 11:45 UTC50m
2026-06-30 GESKR ORM → ORM Jun 30, 08:40 UTCJun 30, 09:30 UTC50m
2026-06-29 GESKR - Jun 29, 13:30 UTCJun 29, 16:44 UTC3h 15m
2026-06-29 GESKR ORM → ORM Jun 29, 11:20 UTCJun 29, 12:14 UTC55m
2026-06-29 GESKR - Jun 29, 08:29 UTCJun 29, 10:34 UTC2h 5m
2026-06-25 GESKR ORM → ORM Jun 25, 10:35 UTCJun 25, 11:30 UTC55m
2026-06-25 GESKR ORM → ORM Jun 25, 09:05 UTCJun 25, 09:55 UTC50m
2026-06-24 GESKR ORM → ORM Jun 24, 12:40 UTCJun 24, 13:30 UTC50m
2026-06-24 GESKR ORM → ORM Jun 24, 09:39 UTCJun 24, 10:25 UTC45m
2026-06-23 GESKR - Jun 23, 15:19 UTCJun 23, 16:05 UTC45m
2026-06-23 GESKR - Jun 23, 10:59 UTCJun 23, 11:45 UTC45m
2026-06-23 GESKR ORM → ORM Jun 23, 09:14 UTCJun 23, 09:59 UTC45m
2026-06-22 GESKR ORM → ORM Jun 22, 10:40 UTCJun 22, 12:05 UTC1h 25m
2026-06-21 GESKR ORM → ORM Jun 21, 10:49 UTCJun 21, 11:40 UTC50m
2026-06-21 GESKR - Jun 21, 07:00 UTCJun 21, 07:45 UTC45m
2026-06-20 GESKR ORM → ORM Jun 20, 12:34 UTCJun 20, 13:14 UTC40m
2026-06-20 GESKR - Jun 20, 09:05 UTCJun 20, 09:49 UTC45m
2026-06-19 GESKR - Jun 19, 14:54 UTCJun 19, 15:39 UTC45m
2026-06-19 GESKR ORM → ORM Jun 19, 11:09 UTCJun 19, 11:54 UTC45m
2026-06-19 GESKR - Jun 19, 09:09 UTCJun 19, 09:55 UTC45m
2026-06-16 GESKR - Jun 16, 13:00 UTCJun 16, 13:50 UTC50m
2026-06-16 GESKR - Jun 16, 10:55 UTCJun 16, 11:40 UTC45m
2026-06-16 GESKR - Jun 16, 09:04 UTCJun 16, 09:50 UTC45m
2026-06-16 GESKR ORM → ORM Jun 16, 06:59 UTCJun 16, 07:25 UTC25m
2026-06-15 GESKR - Jun 15, 13:34 UTCJun 15, 14:24 UTC50m
2026-06-15 GESKR - Jun 15, 10:55 UTCJun 15, 11:39 UTC45m
2026-06-15 GESKR - Jun 15, 08:49 UTCJun 15, 09:35 UTC45m
2026-06-15 GESKR - Jun 15, 07:15 UTCJun 15, 07:55 UTC40m

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

Mode-S 407F9C frequently asked

What is Mode-S code 407F9C?
407F9C is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ESKR.
Where is Mode-S 407F9C registered?
Mode-S code 407F9C 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 407F9C broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407F9C, octal 20077634, decimal 4,226,972.
What flights does 407F9C operate?
Mode-S 407F9C has broadcast 1 distinct callsign, including GESKR.