Apparatus

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sensors Mode-S transponder

406A59

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-GDFS · BOEING 737-800

Hex
406A59
Octal
20065131
Decimal
4,221,529
Country
GB
Tail
G-GDFS
Type
B738
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
403
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 406A59.

Country allocation

The ICAO 24-bit address 406A59 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
EXS32DW - 9 2026-05-25
EXS152B Jet2.com 9 2026-05-25
EXS67T Jet2.com 7 2026-05-26
EXS91KB - 6 2026-07-10
EXS633 Jet2.com 6 2026-04-15
EXS43KO Jet2.com 6 2026-05-26
EXS83KP Jet2.com 5 2026-05-20
EXS41TY Jet2.com 5 2026-05-20
EXS914D Jet2.com 4 2026-05-18
EXS8JR Jet2.com 4 2026-04-15
EXS72D Jet2.com 4 2026-07-25
EXS674E - 4 2026-07-07
EXS64QW Jet2.com 4 2026-05-23
EXS55LD Jet2.com 4 2026-07-25
EXS47EZ - 4 2026-05-18
EXS406R - 4 2026-06-25
EXS34WG Jet2.com 4 2026-04-28
EXS19G - 4 2026-06-25
EXS17YP - 4 2026-07-06
EXS16JU Jet2.com 4 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EXS9UG ZTH → NCL Jul 26, 21:10 UTCJul 26, 22:15 UTC1h 5m
2026-07-26 EXS25XA STN → STN Jul 26, 16:05 UTCJul 26, 19:25 UTC3h 20m
2026-07-26 EXS66TW TFS → STN Jul 26, 11:45 UTCJul 26, 14:40 UTC2h 55m
2026-07-26 EXS65BT SKG → STN Jul 26, 07:30 UTCJul 26, 09:50 UTC2h 20m
2026-07-25 EXS55LD FNC → STN Jul 25, 21:30 UTCJul 26, 01:30 UTC4h 0m
2026-07-25 EXS72D PRG → BHX Jul 25, 16:30 UTCJul 25, 20:15 UTC3h 45m
2026-07-25 EXS72D PRG → BHX Jul 25, 16:15 UTCJul 25, 16:25 UTC10m
2026-07-25 EXS12BK STN → RHO Jul 25, 11:00 UTCJul 25, 14:35 UTC3h 35m
2026-07-25 EXS37J MLA → STN Jul 25, 06:05 UTCJul 25, 09:15 UTC3h 10m
2026-07-24 EXS94Y AGP → LPL Jul 24, 20:00 UTCJul 24, 23:45 UTC3h 45m
2026-07-24 EXS48DQ STN → CFU Jul 24, 14:55 UTCJul 24, 18:00 UTC3h 5m
2026-07-24 EXS84N KRK → EMA Jul 24, 10:10 UTCJul 24, 13:20 UTC3h 10m
2026-07-24 EXS56FC EMA → KRK Jul 24, 09:10 UTCJul 24, 09:15 UTC5m
2026-07-24 EXS56FC EMA → KRK Jul 24, 05:40 UTCJul 24, 06:40 UTC1h 0m
2026-07-23 EXS29WM GLA → AGP Jul 23, 14:05 UTCJul 23, 22:30 UTC8h 25m
2026-07-23 EXS41FZ PMI → MAN Jul 23, 10:20 UTCJul 23, 12:25 UTC2h 5m
2026-07-23 EXS25TO MAN → OPO Jul 23, 06:40 UTCJul 23, 08:40 UTC2h 0m
2026-07-22 EXS88VZ PFO → MAN Jul 22, 21:20 UTCJul 22, 23:50 UTC2h 30m
2026-07-22 EXS88VZ PFO → MAN Jul 22, 20:35 UTCJul 22, 20:45 UTC10m
2026-07-22 EXS12M BRS → BJV Jul 22, 19:30 UTCJul 22, 19:35 UTC5m
2026-07-22 EXS12M BRS → BJV Jul 22, 15:55 UTCJul 22, 17:15 UTC1h 20m
2026-07-22 EXS79CF LPA → BRS Jul 22, 12:05 UTCJul 22, 14:25 UTC2h 20m
2026-07-21 EXS85BH STN → AYT Jul 21, 20:20 UTCJul 21, 23:05 UTC2h 45m
2026-07-21 EXS1065 - Jul 21, 15:55 UTCJul 21, 18:30 UTC2h 35m
2026-07-21 EXS5DV BHX → JSI Jul 21, 11:10 UTCJul 21, 13:50 UTC2h 40m
2026-07-21 EXS41FX MAN → XRY Jul 21, 07:30 UTCJul 21, 10:05 UTC2h 35m
2026-07-20 EXS9GD ACE → BHX Jul 20, 21:15 UTCJul 20, 23:35 UTC2h 20m
2026-07-20 EXS49UT BHX → ACE Jul 20, 17:50 UTCJul 20, 20:10 UTC2h 20m
2026-07-20 EXS049A MAN → MAN Jul 20, 07:20 UTCJul 20, 15:55 UTC8h 35m
2026-07-19 EXS19TW - Jul 19, 20:50 UTCJul 20, 00:50 UTC4h 0m
2026-07-19 EXS9PC - Jul 19, 15:55 UTCJul 19, 19:35 UTC3h 40m
2026-07-19 EXS79CF LPA → BRS Jul 19, 11:10 UTCJul 19, 13:30 UTC2h 20m
2026-07-19 EXS42NU GLA → IBZ Jul 19, 07:15 UTCJul 19, 09:30 UTC2h 15m
2026-07-18 EXS1C - Jul 18, 23:50 UTCJul 19, 02:10 UTC2h 20m
2026-07-18 EXS52EN KRK → MAN Jul 18, 20:25 UTCJul 18, 22:35 UTC2h 10m
2026-07-18 EXS29V KGS → BRS Jul 18, 17:00 UTCJul 18, 19:05 UTC2h 5m
2026-07-18 EXS89PK FNC → BHX Jul 18, 13:45 UTCJul 18, 15:45 UTC2h 0m
2026-07-18 EXS6MT CFU → MAN Jul 18, 09:30 UTCJul 18, 11:30 UTC2h 0m
2026-07-18 EXS13Y PMI → MAN Jul 18, 05:40 UTCJul 18, 07:30 UTC1h 50m
2026-07-17 EXS85BH - Jul 17, 20:15 UTCJul 17, 22:55 UTC2h 40m
2026-07-17 EXS1065 MAN → PMO Jul 17, 15:29 UTCJul 17, 18:10 UTC2h 40m
2026-07-17 EXS86WF - Jul 17, 10:20 UTCJul 17, 12:30 UTC2h 10m
2026-07-17 EXS2KC MAN → MAH Jul 17, 06:54 UTCJul 17, 09:10 UTC2h 15m
2026-07-16 EXS23LB LBA → LCA Jul 16, 21:19 UTCJul 17, 01:05 UTC3h 45m
2026-07-16 EXS7WS - Jul 16, 16:25 UTCJul 16, 19:50 UTC3h 25m
2026-07-14 EXS046A - Jul 14, 20:50 UTCJul 15, 01:50 UTC4h 59m
2026-07-13 EXS9NR - Jul 13, 15:55 UTCJul 13, 20:05 UTC4h 10m
2026-07-13 EXS5QD - Jul 13, 10:20 UTCJul 13, 13:55 UTC3h 35m
2026-07-13 EXS4BA LBA → EFL Jul 13, 05:15 UTCJul 13, 08:25 UTC3h 10m
2026-07-12 EXS4UA - Jul 12, 21:55 UTCJul 13, 01:20 UTC3h 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-GDFS page for operator, model, and routing details .

Mode-S 406A59 frequently asked

What is Mode-S code 406A59?
406A59 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-GDFS.
Where is Mode-S 406A59 registered?
Mode-S code 406A59 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 406A59 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406A59, octal 20065131, decimal 4,221,529.
What flights does 406A59 operate?
Mode-S 406A59 has broadcast 20 distinct callsigns, including EXS32DW, EXS152B, EXS67T, EXS91KB, EXS633.