Apparatus

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sensors Mode-S transponder

406B83

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-GATR · AIRBUS A-320

Hex
406B83
Octal
20065603
Decimal
4,221,827
Country
GB
Tail
G-GATR
Type
A320
Broadcasting now · callsign EFW461M · 35,000 ft
Flights observed
393
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:45 UTC

Current position

406B83 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 406B83 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
EFW6DG BA Euroflyer 13 2026-07-21
EFW7SN - 12 2026-07-22
EFW39FL - 12 2026-07-22
EFW24AD BA Euroflyer 11 2026-07-21
EFW69BK - 10 2026-07-20
EFW67A - 10 2026-07-20
EFW595N - 8 2026-07-19
EFW9ED - 7 2026-07-18
EFW93ML BA Euroflyer 7 2026-07-19
EFW741W - 7 2026-07-03
EFW61U - 7 2026-07-13
EFW50Z - 7 2026-07-03
EFW1RF - 7 2026-07-13
EFW9SA BA Euroflyer 6 2026-07-24
EFW93E BA Euroflyer 6 2026-07-17
EFW7HH BA Euroflyer 6 2026-07-18
EFW5JM BA Euroflyer 6 2026-07-24
EFW5BR - 6 2026-07-14
BAW2817 British Airways 6 2026-07-25
BAW2816 British Airways 6 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFW193M CTA → LGW Jul 26, 20:25 UTCJul 26, 22:45 UTC2h 20m
2026-07-26 EFW73AW LGW → CTA Jul 26, 16:30 UTCJul 26, 18:55 UTC2h 25m
2026-07-26 EFW81PT LPA → LGW Jul 26, 11:25 UTCJul 26, 14:55 UTC3h 30m
2026-07-26 EFW33VR LGW → LPA Jul 26, 05:35 UTCJul 26, 08:55 UTC3h 21m
2026-07-25 BAW2817 LHR → MAH Jul 25, 19:40 UTCJul 25, 21:50 UTC2h 10m
2026-07-25 BAW2816 LGW → ALG Jul 25, 15:35 UTCJul 25, 17:40 UTC2h 5m
2026-07-25 EFW1FG FAO → LGW Jul 25, 11:20 UTCJul 25, 14:00 UTC2h 40m
2026-07-25 EFW16PH LGW → FAO Jul 25, 07:55 UTCJul 25, 10:10 UTC2h 15m
2026-07-24 EFW2FC RAK → LGW Jul 24, 18:55 UTCJul 24, 21:35 UTC2h 40m
2026-07-24 EFW4LY LGW → RAK Jul 24, 14:35 UTCJul 24, 17:25 UTC2h 50m
2026-07-24 EFW5JM JER → LGW Jul 24, 11:25 UTCJul 24, 12:00 UTC35m
2026-07-24 EFW9SA LGW → JER Jul 24, 09:35 UTCJul 24, 10:10 UTC35m
2026-07-23 BAW2817 LHR → MAH Jul 23, 20:35 UTCJul 23, 22:50 UTC2h 15m
2026-07-23 BAW2816 LGW → ALG Jul 23, 17:10 UTCJul 23, 19:15 UTC2h 5m
2026-07-23 EFW91P - Jul 23, 11:00 UTCJul 23, 15:00 UTC4h 0m
2026-07-23 EFW76D LGW → DLM Jul 23, 05:55 UTCJul 23, 09:05 UTC3h 10m
2026-07-22 EFW7SN PFO → LGW Jul 22, 18:00 UTCJul 22, 22:40 UTC4h 40m
2026-07-22 EFW39FL LGW → PFO Jul 22, 12:45 UTCJul 22, 16:30 UTC3h 45m
2026-07-22 EFW11GT MPL → LGW Jul 22, 11:10 UTCJul 22, 11:15 UTC5m
2026-07-21 EFW6DG LCA → LGW Jul 21, 16:45 UTCJul 21, 21:25 UTC4h 40m
2026-07-21 EFW24AD LGW → LCA Jul 21, 11:35 UTCJul 21, 15:30 UTC3h 55m
2026-07-21 EFW5JM JER → LGW Jul 21, 08:45 UTCJul 21, 09:20 UTC35m
2026-07-21 EFW9SA LGW → JER Jul 21, 07:20 UTCJul 21, 07:55 UTC35m
2026-07-20 EFW69BK - Jul 20, 18:40 UTCJul 20, 22:45 UTC4h 5m
2026-07-20 EFW67A LGW → AYT Jul 20, 13:05 UTCJul 20, 17:05 UTC4h 0m
2026-07-20 EFW16YK CAG → LGW Jul 20, 09:15 UTCJul 20, 11:30 UTC2h 15m
2026-07-20 EFW35LD LGW → CAG Jul 20, 05:40 UTCJul 20, 07:30 UTC1h 50m
2026-07-19 EFW93ML ACE → LGW Jul 19, 20:40 UTCJul 19, 23:45 UTC3h 5m
2026-07-19 EFW595N - Jul 19, 18:20 UTCJul 19, 18:30 UTC10m
2026-07-19 EFW595N - Jul 19, 15:00 UTCJul 19, 17:50 UTC2h 50m
2026-07-19 EFW62ME IBZ → LGW Jul 19, 11:10 UTCJul 19, 13:10 UTC2h 0m
2026-07-19 EFW79YW LGW → IBZ Jul 19, 07:30 UTCJul 19, 09:30 UTC2h 0m
2026-07-18 EFW9ED - Jul 18, 20:20 UTCJul 18, 22:20 UTC2h 0m
2026-07-18 EFW7HH LGW → ALC Jul 18, 17:05 UTCJul 18, 19:05 UTC2h 0m
2026-07-18 EFW8AK - Jul 18, 12:30 UTCJul 18, 15:10 UTC2h 40m
2026-07-18 EFW5BP - Jul 18, 07:55 UTCJul 18, 10:45 UTC2h 50m
2026-07-17 BAW2817 - Jul 17, 21:44 UTCJul 17, 23:50 UTC2h 5m
2026-07-17 BAW2816 - Jul 17, 17:20 UTCJul 17, 19:25 UTC2h 5m
2026-07-17 EFW8ZT ACE → LGW Jul 17, 11:35 UTCJul 17, 14:39 UTC3h 5m
2026-07-17 EFW93E LGW → ACE Jul 17, 06:15 UTCJul 17, 09:35 UTC3h 20m
2026-07-16 EFW8RA VRN → LGW Jul 16, 20:35 UTCJul 16, 22:35 UTC2h 0m
2026-07-16 EFW657G - Jul 16, 17:40 UTCJul 16, 19:14 UTC1h 35m
2026-07-16 EFW53CV - Jul 16, 12:14 UTCJul 16, 15:49 UTC3h 35m
2026-07-16 EFW29CF - Jul 16, 06:55 UTCJul 16, 10:45 UTC3h 50m
2026-07-15 EFW75H FAO → LGW Jul 15, 18:55 UTCJul 15, 21:00 UTC2h 5m
2026-07-15 EFW3TW LGW → FAO Jul 15, 15:25 UTCJul 15, 17:55 UTC2h 30m
2026-07-15 EFW8AK - Jul 15, 10:35 UTCJul 15, 13:15 UTC2h 40m
2026-07-15 EFW5BP - Jul 15, 06:05 UTCJul 15, 09:00 UTC2h 55m
2026-07-14 EFW5BR JER → LGW Jul 14, 18:40 UTCJul 14, 19:15 UTC35m
2026-07-14 EFW56R LGW → JER Jul 14, 17:10 UTCJul 14, 17:50 UTC40m

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

Mode-S 406B83 frequently asked

What is Mode-S code 406B83?
406B83 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-GATR.
Where is Mode-S 406B83 registered?
Mode-S code 406B83 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 406B83 broadcasting right now?
Yes. Mode-S 406B83 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406B83, octal 20065603, decimal 4,221,827.
What flights does 406B83 operate?
Mode-S 406B83 has broadcast 20 distinct callsigns, including EFW6DG, EFW7SN, EFW39FL, EFW24AD, EFW69BK.