Apparatus

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sensors Mode-S transponder

40104F

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-GDFO · BOEING 737-300

Hex
40104F
Octal
20010117
Decimal
4,198,479
Country
GB
Tail
G-GDFO
Type
B733
No current signal · last broadcast 4h ago
Flights observed
115
Distinct callsigns
20
Country
GB
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 40104F.

Country allocation

The ICAO 24-bit address 40104F 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 20 distinct

Callsign Airline Flights Last seen
EXS7YA Jet2.com 5 2026-05-22
EXS419 Jet2.com 5 2026-05-22
EXS411 Jet2.com 4 2026-05-20
EXS3KH Jet2.com 4 2026-05-20
EXS9KT Jet2.com 3 2026-06-07
EXS94NG Jet2.com 3 2026-06-03
EXS93CE Jet2.com 3 2026-06-06
EXS91FR Jet2.com 3 2026-06-05
EXS7DB Jet2.com 3 2026-06-06
EXS6H Jet2.com 3 2026-06-09
EXS5WH Jet2.com 3 2026-06-05
EXS5RJ Jet2.com 3 2026-06-04
EXS27VY Jet2.com 3 2026-06-07
EXS24L Jet2.com 3 2026-06-09
EXS86YT Jet2.com 2 2026-06-08
EXS7RH Jet2.com 2 2026-05-08
EXS6YR Jet2.com 2 2026-05-15
EXS6KU Jet2.com 2 2026-06-06
EXS61CU Jet2.com 2 2026-06-08
EXS4ZA Jet2.com 2 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-09 EXS14M AYT → LBA Jun 9, 17:20 UTCJun 9, 18:45 UTC1h 25m
2026-06-09 EXS219Q LBA → BJV Jun 9, 13:45 UTCJun 9, 14:50 UTC1h 5m
2026-06-09 EXS24L SKG → LBA Jun 9, 10:05 UTCJun 9, 12:40 UTC2h 35m
2026-06-09 EXS6H AGP → EMA Jun 9, 06:15 UTCJun 9, 08:40 UTC2h 25m
2026-06-08 EXS7A PMI → LBA Jun 8, 21:15 UTCJun 8, 23:50 UTC2h 35m
2026-06-08 EXS1NM LBA → CHQ Jun 8, 17:35 UTCJun 8, 20:10 UTC2h 35m
2026-06-08 EXS61CU ALC → LBA Jun 8, 15:25 UTCJun 8, 16:25 UTC1h 0m
2026-06-08 EXS86YT JTR → LBA Jun 8, 13:10 UTCJun 8, 14:20 UTC1h 10m
2026-06-08 EXS4DV PMI → LBA Jun 8, 09:45 UTCJun 8, 11:50 UTC2h 5m
2026-06-08 EXS4ZA LBA → BCN Jun 8, 06:15 UTCJun 8, 08:25 UTC2h 10m
2026-06-07 EXS27VY LEI → LBA Jun 7, 18:30 UTCJun 7, 21:20 UTC2h 50m
2026-06-07 EXS9KT ALC → LBA Jun 7, 14:45 UTCJun 7, 17:25 UTC2h 40m
2026-06-07 EXS19H BOJ → LBA Jun 7, 11:05 UTCJun 7, 13:25 UTC2h 20m
2026-06-07 EXS8EY BFS → ACE Jun 7, 06:20 UTCJun 7, 08:50 UTC2h 30m
2026-06-06 EXS7DB NCL → HER Jun 6, 18:39 UTCJun 6, 21:30 UTC2h 50m
2026-06-06 EXS93CE REU → NCL Jun 6, 14:59 UTCJun 6, 17:29 UTC2h 30m
2026-06-06 EXS6KU LBA → BOJ Jun 6, 11:00 UTCJun 6, 13:49 UTC2h 50m
2026-06-06 EXS4LV LBA → GVA Jun 6, 07:05 UTCJun 6, 09:55 UTC2h 50m
2026-06-05 EXS17SE FAO → LBA Jun 5, 19:20 UTCJun 5, 21:55 UTC2h 35m
2026-06-05 EXS247 LBA → FAO Jun 5, 15:25 UTCJun 5, 18:20 UTC2h 55m
2026-06-05 EXS5WH PFO → LBA Jun 5, 11:20 UTCJun 5, 13:50 UTC2h 30m
2026-06-05 EXS91FR LBA → HER Jun 5, 07:10 UTCJun 5, 09:35 UTC2h 25m
2026-06-04 EXS7DB NCL → HER Jun 4, 19:25 UTCJun 4, 22:15 UTC2h 50m
2026-06-04 EXS93CE REU → NCL Jun 4, 15:50 UTCJun 4, 18:20 UTC2h 30m
2026-06-04 EXS5RJ AYT → LBA Jun 4, 11:40 UTCJun 4, 14:05 UTC2h 25m
2026-06-04 EXS29NC LBA → IBZ Jun 4, 06:50 UTCJun 4, 09:25 UTC2h 35m
2026-06-03 EXS27VY LEI → LBA Jun 3, 18:55 UTCJun 3, 21:40 UTC2h 45m
2026-06-03 EXS9KT ALC → LBA Jun 3, 15:15 UTCJun 3, 17:55 UTC2h 40m
2026-06-03 EXS246 SPU → LBA Jun 3, 10:55 UTCJun 3, 13:30 UTC2h 35m
2026-06-03 EXS94NG LBA → PMI Jun 3, 08:25 UTCJun 3, 09:20 UTC55m
2026-06-03 EXS94NG LBA → PMI Jun 3, 07:05 UTCJun 3, 08:20 UTC1h 15m
2026-06-02 EXS5RJ AYT → LBA Jun 2, 13:10 UTCJun 2, 15:55 UTC2h 45m
2026-06-02 EXS29NC LBA → IBZ Jun 2, 09:20 UTCJun 2, 11:45 UTC2h 25m
2026-06-02 EXS059B LBA → LBA Jun 2, 07:00 UTCJun 2, 07:45 UTC45m
2026-06-01 EXS050B MAN → MAN Jun 1, 08:00 UTCJun 1, 08:35 UTC35m
2026-05-29 EXS050B MAN → MAN May 29, 09:10 UTCMay 29, 10:05 UTC55m
2026-05-23 EXS94DL EGC → LBA May 23, 19:00 UTCMay 23, 21:20 UTC2h 20m
2026-05-23 EXS21TK LBA → MLA May 23, 15:35 UTCMay 23, 17:55 UTC2h 20m
2026-05-23 EXS1W PRG → LBA May 23, 10:40 UTCMay 23, 13:20 UTC2h 40m
2026-05-23 EXS201 LBA → AGP May 23, 06:05 UTCMay 23, 08:50 UTC2h 45m
2026-05-22 EXS1BN LBA → CDG May 22, 19:00 UTCMay 22, 21:10 UTC2h 10m
2026-05-22 EXS39ZU LBA → REU May 22, 15:45 UTCMay 22, 17:55 UTC2h 10m
2026-05-22 EXS7YA AGA → LBA May 22, 11:45 UTCMay 22, 14:15 UTC2h 30m
2026-05-22 EXS419 LBA → MAH May 22, 08:20 UTCMay 22, 10:45 UTC2h 25m
2026-05-21 EXS25RT ALC → LBA May 21, 10:35 UTCMay 21, 12:55 UTC2h 20m
2026-05-21 EXS28K LEI → LBA May 21, 06:40 UTCMay 21, 08:55 UTC2h 15m
2026-05-20 EXS26W HER → NCL May 20, 17:50 UTCMay 20, 20:25 UTC2h 35m
2026-05-20 EXS93WN HER → NCL May 20, 14:10 UTCMay 20, 16:50 UTC2h 40m
2026-05-20 EXS3KH LBA → ZTH May 20, 10:05 UTCMay 20, 13:00 UTC2h 55m
2026-05-20 EXS411 LBA → NAP May 20, 06:10 UTCMay 20, 08:35 UTC2h 25m

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

Mode-S 40104F frequently asked

What is Mode-S code 40104F?
40104F is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-GDFO.
Where is Mode-S 40104F registered?
Mode-S code 40104F 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 40104F broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40104F, octal 20010117, decimal 4,198,479.
What flights does 40104F operate?
Mode-S 40104F has broadcast 20 distinct callsigns, including EXS7YA, EXS419, EXS411, EXS3KH, EXS9KT.