sensors Mode-S transponder

405B66

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-EZDM · AIRBUS A-319

Hex
405B66
Octal
20055546
Decimal
4,217,702
Country
GB
Tail
G-EZDM
Type
A319
No current signal · last broadcast 4h ago
Flights observed
527
Distinct callsigns
20
Country
GB
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 405B66.

Country allocation

The ICAO 24-bit address 405B66 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
EZY9 - 10 2026-06-23
EZY86KV - 5 2026-06-24
EZY59NU - 5 2026-07-01
EZY42UA - 5 2026-07-11
EZY36DH - 5 2026-07-01
EZY91EV - 4 2026-06-27
EZY91AM - 4 2026-07-07
EZY87KZ easyJet 4 2026-06-14
EZY78DG - 4 2026-07-09
EZY65HY - 4 2026-06-24
EZY64XR - 4 2026-06-27
EZY46HL - 4 2026-07-08
EZY41PQ easyJet 4 2026-05-18
EZY39HL easyJet 4 2026-05-18
EZY268A - 4 2026-07-08
EZY25CU - 4 2026-07-08
EZY959N easyJet 3 2026-05-06
EZY93HL easyJet 3 2026-06-08
EZY91QH easyJet 3 2026-05-06
EZY86LX - 3 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EZY48EA - Jul 14, 19:55 UTCJul 14, 22:10 UTC2h 15m
2026-07-14 EZY51KG LPL → ALC Jul 14, 16:20 UTCJul 14, 18:55 UTC2h 35m
2026-07-14 EZY536 JER → LPL Jul 14, 14:35 UTCJul 14, 15:25 UTC50m
2026-07-14 EZY34WA LPL → JER Jul 14, 12:35 UTCJul 14, 13:30 UTC55m
2026-07-14 EZY17DR FAO → LPL Jul 14, 08:25 UTCJul 14, 10:50 UTC2h 25m
2026-07-14 EZY83QF LPL → FAO Jul 14, 04:35 UTCJul 14, 07:25 UTC2h 50m
2026-07-13 EZY95ZH - Jul 13, 21:10 UTCJul 13, 23:25 UTC2h 15m
2026-07-13 EZY95XP - Jul 13, 17:20 UTCJul 13, 20:00 UTC2h 40m
2026-07-13 EZY26CL - Jul 13, 13:05 UTCJul 13, 15:15 UTC2h 10m
2026-07-13 EZY39MG - Jul 13, 09:40 UTCJul 13, 12:10 UTC2h 30m
2026-07-13 EZY532 - Jul 13, 07:50 UTCJul 13, 08:20 UTC30m
2026-07-13 EZY567K - Jul 13, 06:30 UTCJul 13, 07:01 UTC30m
2026-07-12 EZY24LM - Jul 12, 21:05 UTCJul 12, 21:35 UTC30m
2026-07-12 EZY646Q LPL → BFS Jul 12, 19:45 UTCJul 12, 20:20 UTC35m
2026-07-12 EZY32MN AMS → LPL Jul 12, 17:55 UTCJul 12, 18:55 UTC1h 0m
2026-07-12 EZY63PJ LPL → AMS Jul 12, 15:50 UTCJul 12, 16:45 UTC55m
2026-07-12 EZY95AM JER → LPL Jul 12, 13:50 UTCJul 12, 14:45 UTC55m
2026-07-12 EZY19DV LPL → JER Jul 12, 12:05 UTCJul 12, 12:55 UTC50m
2026-07-12 EZY46AB - Jul 12, 08:45 UTCJul 12, 11:01 UTC2h 15m
2026-07-12 EZY91FG - Jul 12, 05:05 UTCJul 12, 07:15 UTC2h 10m
2026-07-11 EZY91KY - Jul 11, 22:35 UTCJul 12, 00:55 UTC2h 20m
2026-07-11 EZY76RM LPL → ALC Jul 11, 19:15 UTCJul 11, 21:40 UTC2h 25m
2026-07-11 EZY85XV - Jul 11, 16:10 UTCJul 11, 18:10 UTC2h 0m
2026-07-11 EZY42GF LPL → NCE Jul 11, 12:45 UTCJul 11, 14:45 UTC2h 0m
2026-07-11 EZY17HU - Jul 11, 09:05 UTCJul 11, 11:30 UTC2h 25m
2026-07-11 EZY42UA LGW → LEI Jul 11, 06:01 UTCJul 11, 08:15 UTC2h 15m
2026-07-10 EZY86KZ - Jul 10, 20:50 UTCJul 10, 21:55 UTC1h 5m
2026-07-10 EZY973R LGW → BFS Jul 10, 19:10 UTCJul 10, 20:05 UTC55m
2026-07-10 EZY76WT PUY → LGW Jul 10, 15:35 UTCJul 10, 17:40 UTC2h 5m
2026-07-10 EZY8613 LGW → PUY Jul 10, 12:35 UTCJul 10, 14:20 UTC1h 45m
2026-07-10 EZY52ZY - Jul 10, 08:50 UTCJul 10, 11:05 UTC2h 15m
2026-07-10 EZY85PB - Jul 10, 04:35 UTCJul 10, 06:40 UTC2h 5m
2026-07-09 EZY35TH - Jul 9, 16:10 UTCJul 9, 18:10 UTC2h 0m
2026-07-09 EZY45NK LGW → ALC Jul 9, 12:45 UTCJul 9, 14:55 UTC2h 10m
2026-07-09 EZY45ZD - Jul 9, 10:45 UTCJul 9, 11:25 UTC40m
2026-07-09 EZY54AH LGW → JER Jul 9, 09:25 UTCJul 9, 10:00 UTC35m
2026-07-09 EZY78DG - Jul 9, 06:15 UTCJul 9, 07:40 UTC1h 25m
2026-07-08 EZY268A - Jul 8, 17:40 UTCJul 8, 18:45 UTC1h 5m
2026-07-08 EZY25CU - Jul 8, 14:35 UTCJul 8, 16:30 UTC1h 55m
2026-07-08 EZY46HL - Jul 8, 11:25 UTCJul 8, 13:20 UTC1h 55m
2026-07-08 EZY68YP MUC → LGW Jul 8, 08:10 UTCJul 8, 09:45 UTC1h 35m
2026-07-08 EZY53ZM LGW → MUC Jul 8, 05:45 UTCJul 8, 07:05 UTC1h 20m
2026-07-07 EZY91AM LEI → LGW Jul 7, 19:05 UTCJul 7, 21:25 UTC2h 20m
2026-07-07 EZY42UA LGW → LEI Jul 7, 16:05 UTCJul 7, 18:20 UTC2h 15m
2026-07-07 EZY56KF - Jul 7, 11:55 UTCJul 7, 14:10 UTC2h 15m
2026-07-07 EZY48ED LGW → FCO Jul 7, 08:20 UTCJul 7, 10:20 UTC2h 0m
2026-07-07 EZY19HN JER → LGW Jul 7, 06:10 UTCJul 7, 06:45 UTC35m
2026-07-06 EZY43DN LGW → JER Jul 6, 19:05 UTCJul 6, 19:40 UTC35m
2026-07-06 EZY16RQ - Jul 6, 15:40 UTCJul 6, 18:05 UTC2h 25m
2026-07-06 EZY49ZD - Jul 6, 12:00 UTCJul 6, 14:25 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-EZDM page for operator, model, and routing details .

Mode-S 405B66 frequently asked

What is Mode-S code 405B66?
405B66 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EZDM.
Where is Mode-S 405B66 registered?
Mode-S code 405B66 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 405B66 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 405B66, octal 20055546, decimal 4,217,702.
What flights does 405B66 operate?
Mode-S 405B66 has broadcast 20 distinct callsigns, including EZY9, EZY86KV, EZY59NU, EZY42UA, EZY36DH.