Apparatus

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sensors Mode-S transponder

407739

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TUMH · BOEING 737 MAX 8

Hex
407739
Octal
20073471
Decimal
4,224,825
Country
GB
Tail
G-TUMH
Type
B38M
Broadcasting now · callsign TOM7TM · 35,300 ft
Flights observed
366
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:15 UTC

Current position

407739 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 407739 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
TOM52K - 6 2026-06-18
TOM6BL TUI Airways 5 2026-07-13
TOM61V TUI Airways 5 2026-07-19
TOM3XD TUI Airways 5 2026-07-19
TOM3MW TUI Airways 5 2026-07-19
TOM3FT TUI Airways 5 2026-06-18
TOM9TB - 4 2026-07-16
TOM98B TUI Airways 4 2026-05-06
TOM7CD TUI Airways 4 2026-06-22
TOM6HW TUI Airways 4 2026-06-22
TOM6GB - 4 2026-07-13
TOM5MT - 4 2026-07-16
TOM50Y - 4 2026-06-18
TOM45M TUI Airways 4 2026-06-27
TOM41J TUI Airways 4 2026-06-18
TOM1BN TUI Airways 4 2026-05-06
TOM9EA - 3 2026-07-16
TOM93Y - 3 2026-06-19
TOM8WA TUI Airways 3 2026-07-22
TOM8VH - 3 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TOM2NA BOJ → NCL Jul 26, 19:55 UTCJul 26, 22:15 UTC2h 20m
2026-07-26 TOM7TN EXT → ACE Jul 26, 15:00 UTCJul 26, 18:00 UTC3h 0m
2026-07-26 TOM1JB MAN → CFU Jul 26, 09:45 UTCJul 26, 13:10 UTC3h 25m
2026-07-26 TOM7NH TFS → NCL Jul 26, 05:15 UTCJul 26, 08:15 UTC3h 1m
2026-07-25 TOM4DH TFS → GLA Jul 25, 18:35 UTCJul 25, 23:05 UTC4h 30m
2026-07-25 TOM1VB TFS → MAN Jul 25, 12:40 UTCJul 25, 16:45 UTC4h 5m
2026-07-25 TOM7ND - Jul 25, 08:35 UTCJul 25, 10:40 UTC2h 5m
2026-07-25 TOM6EX BHX → EFL Jul 25, 05:25 UTCJul 25, 07:15 UTC1h 50m
2026-07-24 TOM7TK PMI → BHX Jul 24, 17:50 UTCJul 24, 19:50 UTC2h 0m
2026-07-24 TOM8HW BHX → PUY Jul 24, 14:15 UTCJul 24, 16:25 UTC2h 10m
2026-07-24 TOM76N MAN → SSH Jul 24, 09:30 UTCJul 24, 11:40 UTC2h 10m
2026-07-24 TOM4CW EMA → PMI Jul 24, 05:55 UTCJul 24, 07:55 UTC2h 0m
2026-07-23 TOM5JM LGW → RAK Jul 23, 21:10 UTCJul 24, 00:15 UTC3h 5m
2026-07-23 TOM4AK - Jul 23, 15:20 UTCJul 23, 18:55 UTC3h 35m
2026-07-23 TOM13M - Jul 23, 09:45 UTCJul 23, 13:10 UTC3h 25m
2026-07-23 TOM9BC GRO → MAN Jul 23, 05:30 UTCJul 23, 08:25 UTC2h 55m
2026-07-22 TOM83D MAN → PMI Jul 22, 21:40 UTCJul 23, 01:45 UTC4h 5m
2026-07-22 TOM8PW BRS → KGS Jul 22, 16:45 UTCJul 22, 20:05 UTC3h 20m
2026-07-22 TOM8WA LGW → SID Jul 22, 11:15 UTCJul 22, 15:25 UTC4h 10m
2026-07-21 TOM8VH - Jul 21, 18:20 UTCJul 21, 20:15 UTC1h 55m
2026-07-21 TOM18M - Jul 21, 14:25 UTCJul 21, 16:40 UTC2h 15m
2026-07-21 TOM74B - Jul 21, 09:45 UTCJul 21, 12:05 UTC2h 20m
2026-07-21 TOM8KH LGW → PFO Jul 21, 05:55 UTCJul 21, 07:55 UTC2h 0m
2026-07-20 TOM72X RHO → BRS Jul 20, 20:10 UTCJul 21, 00:15 UTC4h 5m
2026-07-20 TOM7FA BRS → RHO Jul 20, 15:00 UTCJul 20, 18:40 UTC3h 40m
2026-07-20 TOM3AB IBZ → BRS Jul 20, 09:30 UTCJul 20, 11:45 UTC2h 15m
2026-07-20 TOM5PE CMF → MAN Jul 20, 05:55 UTCJul 20, 08:00 UTC2h 5m
2026-07-19 TOM3XD LGW → LCA Jul 19, 13:35 UTCJul 20, 01:30 UTC11h 55m
2026-07-19 TOM3MW PMI → BRS Jul 19, 10:00 UTCJul 19, 12:05 UTC2h 5m
2026-07-19 TOM61V MAN → SID Jul 19, 05:25 UTCJul 19, 07:40 UTC2h 15m
2026-07-18 TOM762 BRS → BRS Jul 18, 14:40 UTCJul 19, 02:40 UTC12h 0m
2026-07-18 TOM3CW - Jul 18, 10:20 UTCJul 18, 12:15 UTC1h 55m
2026-07-18 TOM55C HER → EMA Jul 18, 07:15 UTCJul 18, 08:55 UTC1h 40m
2026-07-17 TOM1TE - Jul 17, 17:40 UTCJul 17, 21:00 UTC3h 20m
2026-07-17 TOM8GK - Jul 17, 13:10 UTCJul 17, 16:24 UTC3h 15m
2026-07-17 TOM4TJ - Jul 17, 09:25 UTCJul 17, 11:30 UTC2h 5m
2026-07-17 TOM3BW BRS → IBZ Jul 17, 06:10 UTCJul 17, 08:15 UTC2h 5m
2026-07-16 TOM9EA - Jul 16, 21:19 UTCJul 17, 01:15 UTC3h 55m
2026-07-16 TOM4LB - Jul 16, 16:09 UTCJul 16, 19:30 UTC3h 20m
2026-07-16 TOM9TB MLA → BRS Jul 16, 09:25 UTCJul 16, 12:40 UTC3h 15m
2026-07-16 TOM5MT BRS → MLA Jul 16, 05:20 UTCJul 16, 08:15 UTC2h 55m
2026-07-15 TOM7BX - Jul 15, 19:30 UTCJul 15, 21:25 UTC1h 55m
2026-07-15 TOM1NG RHO → STN Jul 15, 16:25 UTCJul 15, 18:05 UTC1h 40m
2026-07-15 TOM7WM - Jul 15, 10:55 UTCJul 15, 13:55 UTC3h 0m
2026-07-15 TOM6NY - Jul 15, 06:10 UTCJul 15, 08:40 UTC2h 30m
2026-07-14 TOM11N ZTH → BRS Jul 14, 19:25 UTCJul 14, 22:55 UTC3h 29m
2026-07-14 TOM7MC BRS → ZTH Jul 14, 14:55 UTCJul 14, 17:45 UTC2h 50m
2026-07-14 TOM7AG - Jul 14, 09:30 UTCJul 14, 11:25 UTC1h 55m
2026-07-14 TOM1GE - Jul 14, 06:30 UTCJul 14, 08:15 UTC1h 45m
2026-07-13 TOM7KY - Jul 13, 21:10 UTCJul 14, 00:35 UTC3h 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-TUMH page for operator, model, and routing details .

Mode-S 407739 frequently asked

What is Mode-S code 407739?
407739 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TUMH.
Where is Mode-S 407739 registered?
Mode-S code 407739 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 407739 broadcasting right now?
Yes. Mode-S 407739 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407739, octal 20073471, decimal 4,224,825.
What flights does 407739 operate?
Mode-S 407739 has broadcast 20 distinct callsigns, including TOM52K, TOM6BL, TOM61V, TOM3XD, TOM3MW.