Apparatus

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sensors Mode-S transponder

407E04

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-YYES · CIRRUS SR-20

Hex
407E04
Octal
20077004
Decimal
4,226,564
Country
GB
Tail
G-YYES
Type
SR20
No current signal · last broadcast 10h ago
Flights observed
82
Distinct callsigns
1
Country
GB
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 407E04.

Country allocation

The ICAO 24-bit address 407E04 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
GYYES - 82 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GYYES - Jul 17, 16:24 UTCJul 17, 17:35 UTC1h 10m
2026-07-17 GYYES - Jul 17, 14:20 UTCJul 17, 14:50 UTC30m
2026-07-17 GYYES - Jul 17, 14:04 UTCJul 17, 14:15 UTC10m
2026-07-17 GYYES - Jul 17, 11:20 UTCJul 17, 12:40 UTC1h 20m
2026-07-16 GYYES - Jul 16, 17:00 UTCJul 16, 17:40 UTC40m
2026-07-16 GYYES - Jul 16, 13:25 UTCJul 16, 15:05 UTC1h 40m
2026-07-15 GYYES - Jul 15, 13:20 UTCJul 15, 14:50 UTC1h 30m
2026-07-13 GYYES NQY → BQH Jul 13, 13:55 UTCJul 13, 15:45 UTC1h 50m
2026-07-13 GYYES - Jul 13, 10:10 UTCJul 13, 11:35 UTC1h 25m
2026-07-09 GYYES - Jul 9, 17:10 UTCJul 9, 18:20 UTC1h 10m
2026-07-09 GYYES - Jul 9, 13:30 UTCJul 9, 14:55 UTC1h 25m
2026-07-09 GYYES - Jul 9, 10:50 UTCJul 9, 12:05 UTC1h 15m
2026-07-08 GYYES - Jul 8, 15:10 UTCJul 8, 16:00 UTC50m
2026-07-08 GYYES BQH → LTQ Jul 8, 11:35 UTCJul 8, 12:15 UTC40m
2026-07-06 GYYES - Jul 6, 14:20 UTCJul 6, 15:15 UTC55m
2026-07-06 GYYES - Jul 6, 10:55 UTCJul 6, 12:50 UTC1h 55m
2026-07-02 GYYES - Jul 2, 14:15 UTCJul 2, 16:05 UTC1h 50m
2026-07-02 GYYES - Jul 2, 11:45 UTCJul 2, 12:20 UTC35m
2026-06-29 GYYES - Jun 29, 13:59 UTCJun 29, 14:54 UTC55m
2026-06-29 GYYES - Jun 29, 11:10 UTCJun 29, 12:20 UTC1h 10m
2026-06-27 GYYES - Jun 27, 13:09 UTCJun 27, 13:55 UTC45m
2026-06-27 GYYES - Jun 27, 10:54 UTCJun 27, 12:19 UTC1h 25m
2026-06-24 GYYES - Jun 24, 13:54 UTCJun 24, 14:45 UTC50m
2026-06-24 GYYES - Jun 24, 11:05 UTCJun 24, 12:14 UTC1h 10m
2026-06-23 GYYES - Jun 23, 11:14 UTCJun 23, 13:05 UTC1h 50m
2026-06-21 GYYES GBA → BQH Jun 21, 13:29 UTCJun 21, 14:44 UTC1h 15m
2026-06-21 GYYES BQH → GBA Jun 21, 10:29 UTCJun 21, 11:49 UTC1h 20m
2026-06-20 GYYES - Jun 20, 15:14 UTCJun 20, 15:49 UTC35m
2026-06-20 GYYES - Jun 20, 13:29 UTCJun 20, 14:29 UTC1h 0m
2026-06-20 GYYES BQH → BQH Jun 20, 09:29 UTCJun 20, 10:39 UTC1h 10m
2026-06-14 GYYES - Jun 14, 13:35 UTCJun 14, 15:00 UTC1h 25m
2026-06-14 GYYES - Jun 14, 10:25 UTCJun 14, 11:50 UTC1h 25m
2026-06-07 GYYES - Jun 7, 13:10 UTCJun 7, 13:40 UTC30m
2026-06-07 GYYES - Jun 7, 09:40 UTCJun 7, 10:35 UTC55m
2026-06-05 GYYES BQH → BQH Jun 5, 15:50 UTCJun 5, 17:00 UTC1h 10m
2026-06-04 GYYES GCI → BQH Jun 4, 17:20 UTCJun 4, 18:30 UTC1h 10m
2026-06-04 GYYES - Jun 4, 06:15 UTCJun 4, 07:40 UTC1h 25m
2026-06-03 GYYES - Jun 3, 18:25 UTCJun 3, 19:05 UTC40m
2026-06-03 GYYES - Jun 3, 14:10 UTCJun 3, 15:35 UTC1h 25m
2026-06-02 GYYES - Jun 2, 18:05 UTCJun 2, 19:05 UTC1h 0m
2026-06-01 GYYES - Jun 1, 17:25 UTCJun 1, 18:00 UTC35m
2026-06-01 GYYES - Jun 1, 15:00 UTCJun 1, 16:35 UTC1h 35m
2026-06-01 GYYES - Jun 1, 11:45 UTCJun 1, 13:45 UTC2h 0m
2026-06-01 GYYES - Jun 1, 10:10 UTCJun 1, 10:55 UTC45m
2026-05-30 GYYES - May 30, 13:15 UTCMay 30, 14:00 UTC45m
2026-05-30 GYYES - May 30, 10:45 UTCMay 30, 11:35 UTC50m
2026-05-29 GYYES - May 29, 11:10 UTCMay 29, 12:45 UTC1h 35m
2026-05-29 GYYES - May 29, 08:25 UTCMay 29, 09:35 UTC1h 10m
2026-05-28 GYYES - May 28, 14:25 UTCMay 28, 15:25 UTC1h 0m
2026-05-28 GYYES NWI → HUY May 28, 12:20 UTCMay 28, 12:55 UTC35m

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

Mode-S 407E04 frequently asked

What is Mode-S code 407E04?
407E04 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-YYES.
Where is Mode-S 407E04 registered?
Mode-S code 407E04 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 407E04 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407E04, octal 20077004, decimal 4,226,564.
What flights does 407E04 operate?
Mode-S 407E04 has broadcast 1 distinct callsign, including GYYES.