sensors Mode-S transponder

406AC3

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-GDFY · BOEING 737-800

Hex
406AC3
Octal
20065303
Decimal
4,221,635
Country
GB
Tail
G-GDFY
Type
B738
No current signal · last broadcast 4h ago
Flights observed
186
Distinct callsigns
20
Country
GB
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 406AC3.

Country allocation

The ICAO 24-bit address 406AC3 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
EXS5BA Jet2.com 8 2026-04-18
EXS2KR - 6 2026-04-17
EXS75HB Jet2.com 4 2026-04-13
EXS33AN Jet2.com 4 2026-04-18
EXS8EY Jet2.com 3 2026-05-19
EXS88VZ Jet2.com 3 2026-05-09
EXS56AM Jet2.com 3 2026-05-09
EXS2MY Jet2.com 3 2026-04-15
EXS2JZ - 3 2026-04-13
EXS28QJ Jet2.com 3 2026-04-16
EXS22EF Jet2.com 3 2026-05-09
EXS98UT Jet2.com 2 2026-04-28
EXS96N Jet2.com 2 2026-05-27
EXS87RD Jet2.com 2 2026-05-01
EXS82P Jet2.com 2 2026-04-17
EXS71CB Jet2.com 2 2026-04-16
EXS69MQ Jet2.com 2 2026-05-11
EXS69G Jet2.com 2 2026-05-27
EXS5UG Jet2.com 2 2026-05-01
EXS4ND Jet2.com 2 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EXS32DA PMI → LPL May 29, 21:40 UTCMay 29, 23:55 UTC2h 15m
2026-05-29 EXS3GP LPL → PMI May 29, 18:25 UTCMay 29, 20:30 UTC2h 5m
2026-05-29 EXS27FJ BOJ → EMA May 29, 15:25 UTCMay 29, 17:15 UTC1h 50m
2026-05-29 EXS6GY CFU → EDI May 29, 12:05 UTCMay 29, 13:55 UTC1h 50m
2026-05-29 EXS93PK LPA → EMA May 29, 09:00 UTCMay 29, 10:50 UTC1h 50m
2026-05-29 EXS42EJ EMA → LPA May 29, 06:00 UTCMay 29, 07:40 UTC1h 40m
2026-05-28 EXS98RH EFL → EMA May 28, 20:45 UTCMay 28, 23:50 UTC3h 5m
2026-05-28 EXS17RS EMA → ACE May 28, 16:05 UTCMay 28, 18:50 UTC2h 45m
2026-05-28 EXS3AK GVA → EMA May 28, 05:35 UTCMay 28, 14:45 UTC9h 10m
2026-05-27 EXS69G BHX → TFS May 27, 20:15 UTCMay 27, 23:35 UTC3h 20m
2026-05-27 EXS96N EDI → LPA May 27, 15:30 UTCMay 27, 19:00 UTC3h 30m
2026-05-27 EXS628 DBV → EMA May 27, 11:30 UTCMay 27, 14:10 UTC2h 40m
2026-05-27 EXS2KV EDI → PMI May 27, 07:05 UTCMay 27, 09:35 UTC2h 30m
2026-05-26 EXS6LW DLM → EMA May 26, 19:10 UTCMay 26, 22:44 UTC3h 35m
2026-05-26 EXS6RG EMA → VRN May 26, 13:45 UTCMay 26, 17:09 UTC3h 25m
2026-05-26 EXS9CM INN → EDI May 26, 10:14 UTCMay 26, 12:20 UTC2h 5m
2026-05-26 EXS66R KGS → MAN May 26, 06:44 UTCMay 26, 09:04 UTC2h 20m
2026-05-25 EXS16V REU → EMA May 25, 20:09 UTCMay 25, 23:49 UTC3h 40m
2026-05-25 EXS621 EMA → DLM May 25, 14:55 UTCMay 25, 18:45 UTC3h 50m
2026-05-25 EXS4GC MAN → TFS May 25, 10:55 UTCMay 25, 13:20 UTC2h 25m
2026-05-25 EXS38GS EMA → FAO May 25, 07:10 UTCMay 25, 09:45 UTC2h 35m
2026-05-24 EXS1BL FAO → EMA May 24, 23:10 UTCMay 25, 02:40 UTC3h 30m
2026-05-24 EXS92RV EMA → FAO May 24, 18:10 UTCMay 24, 21:45 UTC3h 35m
2026-05-24 EXS60P BOJ → EMA May 24, 10:50 UTCMay 24, 14:45 UTC3h 55m
2026-05-24 EXS63T EMA → BOJ May 24, 05:30 UTCMay 24, 09:25 UTC3h 55m
2026-05-23 EXS69G BHX → TFS May 23, 19:55 UTCMay 23, 23:05 UTC3h 10m
2026-05-23 EXS96N EDI → LPA May 23, 15:30 UTCMay 23, 18:45 UTC3h 16m
2026-05-23 EXS3AK GVA → EMA May 23, 10:20 UTCMay 23, 14:05 UTC3h 45m
2026-05-23 EXS54R GVA → EMA May 23, 05:10 UTCMay 23, 09:00 UTC3h 50m
2026-05-22 EXS35W JSI → EMA May 22, 18:35 UTCMay 22, 22:30 UTC3h 55m
2026-05-22 EXS92SB EMA → JSI May 22, 13:20 UTCMay 22, 17:10 UTC3h 50m
2026-05-22 EXS31ED AYT → EDI May 22, 09:30 UTCMay 22, 11:40 UTC2h 10m
2026-05-22 EXS641 EMA → ALC May 22, 05:55 UTCMay 22, 08:00 UTC2h 5m
2026-05-21 EXS64MZ EMA → FNC May 21, 14:10 UTCMay 21, 22:50 UTC8h 40m
2026-05-21 EXS650 MLA → EMA May 21, 09:10 UTCMay 21, 12:30 UTC3h 20m
2026-05-21 EXS9VL EDI → PMI May 21, 05:00 UTCMay 21, 07:55 UTC2h 55m
2026-05-20 EXS14C KGS → LPL May 20, 12:15 UTCMay 20, 15:25 UTC3h 10m
2026-05-20 EXS71Q AYT → LPL May 20, 07:55 UTCMay 20, 10:30 UTC2h 35m
2026-05-19 EXS31ED AYT → EDI May 19, 10:30 UTCMay 19, 12:50 UTC2h 20m
2026-05-19 EXS8EY BFS → ACE May 19, 06:40 UTCMay 19, 09:00 UTC2h 20m
2026-05-18 EXS25RT ALC → LBA May 18, 20:35 UTCMay 18, 22:55 UTC2h 20m
2026-05-18 EXS28K LEI → LBA May 18, 17:00 UTCMay 18, 19:05 UTC2h 4m
2026-05-18 EXS44T HER → LBA May 18, 10:45 UTCMay 18, 14:40 UTC3h 55m
2026-05-18 EXS55DG PFO → NCL May 18, 05:35 UTCMay 18, 09:00 UTC3h 25m
2026-05-17 EXS5M PFO → NCL May 17, 21:25 UTCMay 18, 01:20 UTC3h 55m
2026-05-17 EXS51FG TFS → NCL May 17, 16:25 UTCMay 17, 20:05 UTC3h 40m
2026-05-17 EXS3TJ ACE → LBA May 17, 11:10 UTCMay 17, 15:01 UTC3h 50m
2026-05-17 EXS17CY LBA → ACE May 17, 05:05 UTCMay 17, 08:40 UTC3h 35m
2026-05-16 EXS478 LPA → LBA May 16, 21:55 UTCMay 17, 01:35 UTC3h 40m
2026-05-16 EXS477 LBA → LPA May 16, 16:15 UTCMay 16, 20:10 UTC3h 55m

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

Mode-S 406AC3 frequently asked

What is Mode-S code 406AC3?
406AC3 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-GDFY.
Where is Mode-S 406AC3 registered?
Mode-S code 406AC3 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 406AC3 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 406AC3, octal 20065303, decimal 4,221,635.
What flights does 406AC3 operate?
Mode-S 406AC3 has broadcast 20 distinct callsigns, including EXS5BA, EXS2KR, EXS75HB, EXS33AN, EXS8EY.