Apparatus

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sensors Mode-S transponder

4066CE

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TAWG · BOEING 737-800

Hex
4066CE
Octal
20063316
Decimal
4,220,622
Country
GB
Tail
G-TAWG
Type
B738
Broadcasting now · callsign TOM7CM · 37,000 ft
Flights observed
321
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 21:30 UTC

Current position

4066CE is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4066CE 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
TOM9TJ TUI Airways 5 2026-07-05
TUI2KM TUIfly 4 2026-04-20
TOM9YC - 4 2026-06-29
TOM458 - 4 2026-06-29
TOM39E TUI Airways 4 2026-07-05
TUI6G TUIfly 3 2026-04-16
TUI49E - 3 2026-04-13
TUI2B TUIfly 3 2026-04-16
TOM71V TUI Airways 3 2026-06-13
TOM5LT TUI Airways 3 2026-06-13
TOM52B - 3 2026-06-17
TOM42M - 3 2026-06-17
TOM34D TUI Airways 3 2026-06-22
TOM9YW TUI Airways 2 2026-07-17
TOM9LX TUI Airways 2 2026-07-26
TOM9JB TUI Airways 2 2026-06-13
TOM9GM - 2 2026-06-16
TOM9FE TUI Airways 2 2026-05-02
TOM9FC TUI Airways 2 2026-07-04
TOM95K - 2 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TOM35M BHX → SSH Jul 26, 21:15 UTCJul 26, 21:30 UTC15m
2026-07-26 TOM8FM CWL → PFO Jul 26, 15:15 UTCJul 26, 19:20 UTC4h 5m
2026-07-26 TOM12X ACE → CWL Jul 26, 10:15 UTCJul 26, 13:55 UTC3h 40m
2026-07-26 TOM9LX BHX → BHX Jul 26, 05:20 UTCJul 26, 08:40 UTC3h 21m
2026-07-25 TOM1DX MAH → CWL Jul 25, 17:55 UTCJul 25, 22:00 UTC4h 5m
2026-07-25 TOM7CM LGW → INN Jul 25, 13:00 UTCJul 25, 16:40 UTC3h 40m
2026-07-25 TOM1FK PMI → DUB Jul 25, 09:00 UTCJul 25, 11:05 UTC2h 5m
2026-07-25 TOM8KV MAH → LGW Jul 25, 05:30 UTCJul 25, 07:40 UTC2h 10m
2026-07-24 TOM675 DLM → CWL Jul 24, 22:20 UTCJul 25, 02:20 UTC4h 0m
2026-07-24 TOM674 CWL → DLM Jul 24, 17:00 UTCJul 24, 20:50 UTC3h 50m
2026-07-24 TOM659 CUN → BRS Jul 24, 10:35 UTCJul 24, 15:00 UTC4h 25m
2026-07-24 TOM658 BRS → CUN Jul 24, 05:20 UTCJul 24, 09:20 UTC4h 0m
2026-07-23 TOM7VY EXT → LPA Jul 23, 17:15 UTCJul 23, 20:00 UTC2h 45m
2026-07-23 TOM2CV CWL → DBV Jul 23, 13:30 UTCJul 23, 16:00 UTC2h 30m
2026-07-23 TOM1YH FNC → MAN Jul 23, 09:10 UTCJul 23, 11:20 UTC2h 10m
2026-07-23 TOM4DE CFU → NCL Jul 23, 05:40 UTCJul 23, 08:05 UTC2h 25m
2026-07-22 TOM3AG LPA → LGW Jul 22, 18:40 UTCJul 22, 23:25 UTC4h 45m
2026-07-22 TOM5TN HER → NWI Jul 22, 13:05 UTCJul 22, 17:10 UTC4h 5m
2026-07-22 TOM95K - Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 TOM2FM LGW → LXR Jul 22, 05:15 UTCJul 22, 10:25 UTC5h 10m
2026-07-21 TOM2EW LGW → ACE Jul 21, 19:35 UTCJul 21, 23:00 UTC3h 25m
2026-07-21 TOM57D BHX → VRN Jul 21, 12:55 UTCJul 21, 16:35 UTC3h 40m
2026-07-21 TOM32K LTN → TFS Jul 21, 08:40 UTCJul 21, 10:40 UTC2h 0m
2026-07-21 TOM44M MAN → FUE Jul 21, 05:10 UTCJul 21, 07:05 UTC1h 55m
2026-07-20 TOM2BC - Jul 20, 20:15 UTCJul 20, 23:25 UTC3h 10m
2026-07-20 TOM2PH CWL → LPA Jul 20, 14:50 UTCJul 20, 18:15 UTC3h 25m
2026-07-20 TOM9JW GLA → IBZ Jul 20, 09:30 UTCJul 20, 13:05 UTC3h 35m
2026-07-20 TOM4GX TFS → CWL Jul 20, 05:15 UTCJul 20, 08:15 UTC3h 0m
2026-07-19 TOM2AT TFS → CWL Jul 19, 20:05 UTCJul 19, 23:30 UTC3h 25m
2026-07-19 TOM97X EMA → LPA Jul 19, 14:50 UTCJul 19, 18:30 UTC3h 40m
2026-07-19 TOM6FH TFS → TFS Jul 19, 11:10 UTCJul 19, 13:20 UTC2h 10m
2026-07-19 TOM55N CWL → AGP Jul 19, 06:30 UTCJul 19, 08:50 UTC2h 20m
2026-07-17 TOM3NL ZTH → CWL Jul 17, 19:25 UTCJul 17, 22:45 UTC3h 20m
2026-07-17 TOM9AE RHO → LGW Jul 17, 14:55 UTCJul 17, 18:05 UTC3h 10m
2026-07-17 TOM9YW LGW → LPA Jul 17, 10:15 UTCJul 17, 12:19 UTC2h 5m
2026-07-17 TOM57M BHX → ZTH Jul 17, 05:45 UTCJul 17, 07:50 UTC2h 5m
2026-07-16 TOM695 AYT → CWL Jul 16, 21:45 UTCJul 17, 02:10 UTC4h 25m
2026-07-16 TOM694 - Jul 16, 15:55 UTCJul 16, 19:45 UTC3h 50m
2026-07-16 TOM8BG - Jul 16, 09:35 UTCJul 16, 13:05 UTC3h 30m
2026-07-16 TOM79W - Jul 16, 05:00 UTCJul 16, 08:10 UTC3h 10m
2026-07-15 TOM8VM RHO → CWL Jul 15, 21:10 UTCJul 16, 01:20 UTC4h 10m
2026-07-15 TOM7FT CWL → RHO Jul 15, 15:10 UTCJul 15, 18:45 UTC3h 35m
2026-07-15 TOM6DH IBZ → CWL Jul 15, 09:50 UTCJul 15, 11:50 UTC2h 0m
2026-07-15 TOM8XL CWL → IBZ Jul 15, 06:00 UTCJul 15, 08:10 UTC2h 10m
2026-07-14 TOM42B - Jul 14, 18:45 UTCJul 14, 22:15 UTC3h 30m
2026-07-14 TOM45N - Jul 14, 14:15 UTCJul 14, 17:10 UTC2h 55m
2026-07-14 TOM8PG ALC → CWL Jul 14, 10:10 UTCJul 14, 12:10 UTC2h 0m
2026-07-14 TOM24G CWL → ALC Jul 14, 05:10 UTCJul 14, 07:25 UTC2h 15m
2026-07-13 TOM2BG - Jul 13, 18:35 UTCJul 13, 21:35 UTC3h 0m
2026-07-13 TOM6YM - Jul 13, 14:10 UTCJul 13, 16:40 UTC2h 30m

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

Mode-S 4066CE frequently asked

What is Mode-S code 4066CE?
4066CE is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TAWG.
Where is Mode-S 4066CE registered?
Mode-S code 4066CE 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 4066CE broadcasting right now?
Yes. Mode-S 4066CE is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4066CE, octal 20063316, decimal 4,220,622.
What flights does 4066CE operate?
Mode-S 4066CE has broadcast 20 distinct callsigns, including TOM9TJ, TUI2KM, TOM9YC, TOM458, TOM39E.