Apparatus

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sensors Mode-S transponder

4064A4

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-FDZX · BOEING 737-800

Hex
4064A4
Octal
20062244
Decimal
4,220,068
Country
GB
Tail
G-FDZX
Type
B738
Broadcasting now · callsign TOM8GJ · 21,875 ft
Flights observed
323
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 23:00 UTC

Current position

4064A4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4064A4 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
TOM7LX TUI Airways 8 2026-06-27
TOM90X TUI Airways 7 2026-06-27
TOM71C - 7 2026-06-29
TOM67N TUI Airways 7 2026-06-29
TOM61K - 7 2026-06-29
TOM4PA - 7 2026-06-27
TOM99Y - 6 2026-07-02
TOM8HT - 6 2026-07-02
TOM7KV - 6 2026-07-01
TOM6LY - 6 2026-06-27
TOM53T - 6 2026-07-02
TOM53E - 6 2026-07-02
TOM1YW - 6 2026-07-01
TOM4YT TUI Airways 5 2026-06-28
TOM2NG TUI Airways 5 2026-06-28
TOM1WY TUI Airways 5 2026-06-28
TOM1CK TUI Airways 5 2026-07-03
TOM6EC TUI Airways 4 2026-06-26
TOM5DB TUI Airways 4 2026-06-26
TOM4PW TUI Airways 4 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TOM4EJ AGA → MAN Jul 26, 18:10 UTCJul 26, 23:00 UTC4h 50m
2026-07-26 TOM32X DBV → BHX Jul 26, 12:05 UTCJul 26, 16:20 UTC4h 15m
2026-07-26 TOM5AG EMA → ALC Jul 26, 06:55 UTCJul 26, 10:25 UTC3h 30m
2026-07-25 TOM759 AYT → BHX Jul 25, 18:40 UTCJul 25, 23:00 UTC4h 20m
2026-07-25 TOM758 BHX → AYT Jul 25, 12:55 UTCJul 25, 17:00 UTC4h 5m
2026-07-25 TOM3EY TFS → NWI Jul 25, 09:00 UTCJul 25, 10:45 UTC1h 45m
2026-07-25 TOM3AM BRS → EFL Jul 25, 05:50 UTCJul 25, 07:25 UTC1h 35m
2026-07-24 TOM2KJ MAN → SID Jul 24, 20:35 UTCJul 24, 23:25 UTC2h 50m
2026-07-24 TOM5LW MAN → JSI Jul 24, 15:20 UTCJul 24, 18:05 UTC2h 45m
2026-07-24 TOM9WK MAN → VRN Jul 24, 05:25 UTCJul 24, 13:10 UTC7h 45m
2026-07-23 TOM9VL - Jul 23, 16:30 UTCJul 24, 00:15 UTC7h 45m
2026-07-23 TOM2AW DUB → TFS Jul 23, 11:00 UTCJul 23, 13:30 UTC2h 30m
2026-07-23 TOM5MW CFU → CWL Jul 23, 06:30 UTCJul 23, 09:00 UTC2h 30m
2026-07-22 TOM73V MAN → DLM Jul 22, 18:35 UTCJul 22, 23:30 UTC4h 55m
2026-07-22 TOM3BY BOJ → LGW Jul 22, 13:10 UTCJul 22, 17:15 UTC4h 5m
2026-07-22 TOM42K BHX → IBZ Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 TOM78X NWI → HER Jul 21, 21:10 UTCJul 22, 01:00 UTC3h 50m
2026-07-21 TOM8FE LGW → BOJ Jul 21, 15:55 UTCJul 21, 19:40 UTC3h 45m
2026-07-21 TOM8HG EMA → DLM Jul 21, 10:55 UTCJul 21, 14:10 UTC3h 15m
2026-07-21 TOM1EY BRS → RVN Jul 21, 06:15 UTCJul 21, 09:25 UTC3h 10m
2026-07-20 TOM9YG - Jul 20, 17:15 UTCJul 20, 20:45 UTC3h 30m
2026-07-20 TOM58H BRS → BJV Jul 20, 12:55 UTCJul 20, 15:55 UTC3h 0m
2026-07-20 TOM8YA HRG → LGW Jul 20, 09:10 UTCJul 20, 11:15 UTC2h 5m
2026-07-20 TOM6MJ SOF → MAN Jul 20, 05:15 UTCJul 20, 07:10 UTC1h 55m
2026-07-19 TOM56K SSH → LGW Jul 19, 15:15 UTCJul 20, 00:25 UTC9h 10m
2026-07-19 TOM37D MAN → LEI Jul 19, 09:30 UTCJul 19, 12:50 UTC3h 20m
2026-07-19 TOM60Y BHX → KVA Jul 19, 05:15 UTCJul 19, 08:10 UTC2h 55m
2026-07-18 TOM759 AYT → BHX Jul 18, 18:05 UTCJul 18, 22:15 UTC4h 10m
2026-07-18 TOM758 BHX → AYT Jul 18, 12:55 UTCJul 18, 16:35 UTC3h 40m
2026-07-18 TOM3EY TFS → NWI Jul 18, 09:10 UTCJul 18, 11:05 UTC1h 55m
2026-07-18 TOM3AM BRS → EFL Jul 18, 05:50 UTCJul 18, 07:30 UTC1h 40m
2026-07-17 TOM2KB LGW → HER Jul 17, 15:10 UTCJul 18, 03:00 UTC11h 51m
2026-07-17 TOM49H EMA → LCA Jul 17, 08:59 UTCJul 17, 11:15 UTC2h 15m
2026-07-17 TOM6AD BHX → ALC Jul 17, 05:30 UTCJul 17, 07:55 UTC2h 25m
2026-07-16 TOM21N PMI → EMA Jul 16, 23:05 UTCJul 17, 02:54 UTC3h 50m
2026-07-16 TOM4ML - Jul 16, 18:15 UTCJul 16, 21:40 UTC3h 25m
2026-07-16 TOM56C - Jul 16, 13:20 UTCJul 16, 16:49 UTC3h 30m
2026-07-16 TOM7BH - Jul 16, 08:50 UTCJul 16, 11:54 UTC3h 5m
2026-07-15 TOM543 - Jul 15, 18:45 UTCJul 15, 22:40 UTC3h 55m
2026-07-15 TOM66B - Jul 15, 13:20 UTCJul 15, 16:40 UTC3h 20m
2026-07-15 TOM2AG - Jul 15, 09:15 UTCJul 15, 11:05 UTC1h 50m
2026-07-15 TOM3BA - Jul 15, 05:55 UTCJul 15, 07:35 UTC1h 40m
2026-07-14 TOM78X KGS → BHX Jul 14, 20:55 UTCJul 15, 00:50 UTC3h 54m
2026-07-14 TOM8FE - Jul 14, 16:20 UTCJul 14, 19:50 UTC3h 30m
2026-07-14 TOM8HG EFL → BHX Jul 14, 11:00 UTCJul 14, 14:20 UTC3h 20m
2026-07-14 TOM1EY - Jul 14, 06:40 UTCJul 14, 09:40 UTC3h 0m
2026-07-13 TOM3TH RHO → BHX Jul 13, 21:50 UTCJul 14, 01:55 UTC4h 5m
2026-07-13 TOM41N - Jul 13, 17:00 UTCJul 13, 20:30 UTC3h 30m
2026-07-13 TOM45E - Jul 13, 12:50 UTCJul 13, 15:25 UTC2h 35m
2026-07-13 TOM5LB - Jul 13, 08:35 UTCJul 13, 10:55 UTC2h 20m

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

Mode-S 4064A4 frequently asked

What is Mode-S code 4064A4?
4064A4 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-FDZX.
Where is Mode-S 4064A4 registered?
Mode-S code 4064A4 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 4064A4 broadcasting right now?
Yes. Mode-S 4064A4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4064A4, octal 20062244, decimal 4,220,068.
What flights does 4064A4 operate?
Mode-S 4064A4 has broadcast 20 distinct callsigns, including TOM7LX, TOM90X, TOM71C, TOM67N, TOM61K.