Apparatus

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sensors Mode-S transponder

4066D0

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TAWI · BOEING 737-800

Hex
4066D0
Octal
20063320
Decimal
4,220,624
Country
GB
Tail
G-TAWI
Type
B738
Broadcasting now · callsign TOM27A · 38,000 ft
Flights observed
377
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 21:15 UTC

Current position

4066D0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4066D0 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
TOM9YW - 7 2026-07-03
TOM57M - 7 2026-07-03
TOM9AE - 6 2026-07-03
TOM6LT - 6 2026-06-27
TOM69M - 6 2026-07-04
TOM5PH TUI Airways 6 2026-06-18
TOM53B - 6 2026-07-07
TOM3NL - 6 2026-07-03
TOM30J - 6 2026-07-04
TOM9JV - 5 2026-07-07
TOM9BJ TUI Airways 5 2026-06-22
TOM97X - 5 2026-07-12
TOM7XM TUI Airways 5 2026-06-18
TOM65X - 5 2026-07-07
TOM5KA TUI Airways 5 2026-06-28
TOM429 TUI Airways 5 2026-07-06
TOM3LY TUI Airways 5 2026-06-22
TOM2MX TUI Airways 5 2026-06-28
TOM2AT - 5 2026-07-12
TOM27Y TUI Airways 5 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TOM8AY LGW → LGW Jul 26, 17:35 UTCJul 26, 21:15 UTC3h 40m
2026-07-26 TOM6MC - Jul 26, 12:05 UTCJul 26, 16:00 UTC3h 55m
2026-07-26 TOM9CE MAN → MAN Jul 26, 07:25 UTCJul 26, 10:40 UTC3h 15m
2026-07-25 TOM3HT BRS → RAK Jul 25, 20:05 UTCJul 25, 22:10 UTC2h 5m
2026-07-25 TOM65L NAP → LGW Jul 25, 15:40 UTCJul 25, 17:55 UTC2h 15m
2026-07-25 TOM86K - Jul 25, 11:30 UTCJul 25, 14:00 UTC2h 30m
2026-07-25 TOM8HA CWL → CFU Jul 25, 06:20 UTCJul 25, 08:30 UTC2h 10m
2026-07-25 TOM4TV BOJ → BHX Jul 25, 00:10 UTCJul 25, 03:35 UTC3h 25m
2026-07-24 TOM3AC BHX → BOJ Jul 24, 20:05 UTCJul 24, 23:00 UTC2h 55m
2026-07-24 TOM9NC GRO → MAN Jul 24, 16:30 UTCJul 24, 18:35 UTC2h 5m
2026-07-24 TOM5MA LGW → LGW Jul 24, 13:10 UTCJul 24, 15:15 UTC2h 5m
2026-07-24 TOM469 NBE → BHX Jul 24, 08:50 UTCJul 24, 11:40 UTC2h 50m
2026-07-24 TOM7NX - Jul 24, 04:45 UTCJul 24, 07:30 UTC2h 45m
2026-07-23 TOM309 SSH → BHX Jul 23, 20:10 UTCJul 24, 01:25 UTC5h 15m
2026-07-23 TOM4HT GLA → LPA Jul 23, 13:20 UTCJul 23, 17:15 UTC3h 55m
2026-07-23 TOM73J IBZ → BHX Jul 23, 09:30 UTCJul 23, 11:35 UTC2h 5m
2026-07-23 TOM3WT KGS → EMA Jul 23, 06:05 UTCJul 23, 08:05 UTC2h 0m
2026-07-22 TOM503 SSH → BHX Jul 22, 13:55 UTCJul 23, 01:30 UTC11h 35m
2026-07-22 TOM6VE DBV → MAN Jul 22, 10:20 UTCJul 22, 12:15 UTC1h 55m
2026-07-21 TOM2PY HRG → MAN Jul 21, 14:05 UTCJul 22, 02:15 UTC12h 10m
2026-07-21 TOM5JK LGW → BCN Jul 21, 09:10 UTCJul 21, 11:10 UTC2h 0m
2026-07-21 TOM1KV MAN → REU Jul 21, 05:50 UTCJul 21, 07:35 UTC1h 45m
2026-07-20 TOM288 MAN → AGA Jul 20, 19:30 UTCJul 21, 03:35 UTC8h 4m
2026-07-20 TOM37C MAN → DBV Jul 20, 13:30 UTCJul 20, 17:00 UTC3h 30m
2026-07-20 TOM8JT MAN → ZTH Jul 20, 08:50 UTCJul 20, 11:55 UTC3h 5m
2026-07-19 TOM10Y REU → GLA Jul 19, 20:00 UTCJul 19, 22:15 UTC2h 15m
2026-07-19 TOM3BV LGW → AGP Jul 19, 16:30 UTCJul 19, 18:45 UTC2h 15m
2026-07-19 TOM6NK FUE → MAN Jul 19, 11:15 UTCJul 19, 14:35 UTC3h 20m
2026-07-19 TOM1WK MAN → CFU Jul 19, 06:25 UTCJul 19, 09:00 UTC2h 35m
2026-07-18 TOM23G NCL → SZG Jul 18, 18:45 UTCJul 18, 22:40 UTC3h 55m
2026-07-18 TOM8KE PFO → PFO Jul 18, 13:40 UTCJul 18, 17:00 UTC3h 20m
2026-07-18 TOM2BA CWL → TFS Jul 18, 09:15 UTCJul 18, 11:10 UTC1h 55m
2026-07-18 TOM7WJ AGP → CWL Jul 18, 06:10 UTCJul 18, 07:55 UTC1h 45m
2026-07-17 TOM21T ZTH → EMA Jul 17, 23:05 UTCJul 18, 02:09 UTC3h 5m
2026-07-17 TOM668 MAN → RAK Jul 17, 18:29 UTCJul 17, 21:30 UTC3h 0m
2026-07-17 TOM11D - Jul 17, 11:04 UTCJul 17, 15:00 UTC3h 55m
2026-07-17 TOM8LW REU → MAN Jul 17, 05:30 UTCJul 17, 08:59 UTC3h 30m
2026-07-16 TOM3XY BRS → ZTH Jul 16, 22:10 UTCJul 17, 01:45 UTC3h 35m
2026-07-16 TOM2EJ - Jul 16, 16:44 UTCJul 16, 20:45 UTC4h 0m
2026-07-16 TOM7EW SKG → MAN Jul 16, 09:55 UTCJul 16, 13:34 UTC3h 40m
2026-07-16 TOM8GN MAN → SKG Jul 16, 05:35 UTCJul 16, 08:30 UTC2h 55m
2026-07-15 TOM9005 - Jul 15, 14:10 UTCJul 15, 15:10 UTC1h 0m
2026-07-14 TOM1T - Jul 14, 18:10 UTCJul 14, 19:35 UTC1h 25m
2026-07-14 TOM1T - Jul 14, 16:45 UTCJul 14, 17:30 UTC45m
2026-07-14 TOM1T - Jul 14, 14:45 UTCJul 14, 16:00 UTC1h 15m
2026-07-14 TOM1T - Jul 14, 11:10 UTCJul 14, 11:40 UTC30m
2026-07-14 TOM9001 - Jul 14, 06:05 UTCJul 14, 06:45 UTC40m
2026-07-13 TOM2BC - Jul 13, 21:20 UTCJul 14, 00:30 UTC3h 10m
2026-07-13 TOM2PH - Jul 13, 15:00 UTCJul 13, 18:45 UTC3h 45m
2026-07-13 TOM9JW - Jul 13, 09:45 UTCJul 13, 13:20 UTC3h 35m

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

Mode-S 4066D0 frequently asked

What is Mode-S code 4066D0?
4066D0 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TAWI.
Where is Mode-S 4066D0 registered?
Mode-S code 4066D0 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 4066D0 broadcasting right now?
Yes. Mode-S 4066D0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4066D0, octal 20063320, decimal 4,220,624.
What flights does 4066D0 operate?
Mode-S 4066D0 has broadcast 20 distinct callsigns, including TOM9YW, TOM57M, TOM9AE, TOM6LT, TOM69M.