Apparatus

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sensors Mode-S transponder

407DCF

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-NPTH · BOEING 737-400

Hex
407DCF
Octal
20076717
Decimal
4,226,511
Country
GB
Tail
G-NPTH
Type
B734
No current signal · last broadcast 1h ago
Flights observed
89
Distinct callsigns
20
Country
GB
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 407DCF.

Country allocation

The ICAO 24-bit address 407DCF 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
NPT2L - 15 2026-07-08
NPT2R - 14 2026-06-25
NPT1B - 5 2026-06-23
MOG076 - 5 2026-06-16
NPT5D - 4 2026-07-01
NPT1A - 4 2026-06-22
MOG077 - 4 2026-06-18
NPT3EA - 3 2026-07-09
NPT2EA - 3 2026-07-10
SWT4904 - 2 2026-07-13
NPT9BF - 2 2026-05-11
NPT8BF - 2 2026-05-08
NPT5U - 2 2026-07-01
NPT3E - 2 2026-06-26
NPT314F - 2 2026-05-22
MOG76P - 2 2026-06-09
MOG76 - 2 2026-05-28
SWT494P - 1 2026-07-13
SWT4804 - 1 2026-07-14
NPT905 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SWT4804 - Jul 14, 15:40 UTCJul 14, 15:45 UTC5m
2026-07-13 SWT4904 - Jul 13, 23:45 UTCJul 14, 00:45 UTC1h 0m
2026-07-13 SWT4904 - Jul 13, 20:45 UTCJul 13, 22:05 UTC1h 20m
2026-07-13 SWT494P - Jul 13, 17:35 UTCJul 13, 18:25 UTC50m
2026-07-12 NPT332F - Jul 12, 08:45 UTCJul 12, 09:35 UTC50m
2026-07-12 NPT331 - Jul 12, 06:15 UTCJul 12, 07:31 UTC1h 15m
2026-07-12 NPT331F - Jul 12, 03:25 UTCJul 12, 04:15 UTC50m
2026-07-10 NPT2EA - Jul 10, 01:55 UTCJul 10, 02:45 UTC50m
2026-07-09 NPT3EA EMA → LGG Jul 9, 23:45 UTCJul 10, 00:40 UTC55m
2026-07-08 NPT3W BFS → EMA Jul 8, 22:55 UTCJul 8, 23:40 UTC45m
2026-07-08 NPT2L EMA → BFS Jul 8, 01:35 UTCJul 8, 02:10 UTC35m
2026-07-01 NPT5D EDI → EMA Jul 1, 23:05 UTCJul 1, 23:45 UTC40m
2026-07-01 NPT5U EMA → EDI Jul 1, 01:30 UTCJul 1, 02:15 UTC45m
2026-06-30 NPT5D EDI → EMA Jun 30, 23:10 UTCJun 30, 23:55 UTC45m
2026-06-30 NPT5D EMA → EDI Jun 30, 01:30 UTCJun 30, 02:15 UTC45m
2026-06-29 NPT5D EDI → EMA Jun 29, 22:59 UTCJun 29, 23:44 UTC45m
2026-06-27 NPT5U EMA → EDI Jun 27, 01:35 UTCJun 27, 02:09 UTC35m
2026-06-26 NPT3E - Jun 26, 23:00 UTCJun 26, 23:44 UTC45m
2026-06-26 NPT2L EMA → BFS Jun 26, 00:30 UTCJun 26, 01:05 UTC35m
2026-06-25 NPT2R - Jun 25, 22:04 UTCJun 25, 22:45 UTC40m
2026-06-25 NPT2L EMA → BFS Jun 25, 00:35 UTCJun 25, 01:14 UTC40m
2026-06-24 NPT2R - Jun 24, 22:04 UTCJun 24, 22:39 UTC35m
2026-06-24 NPT2L EMA → BFS Jun 24, 01:19 UTCJun 24, 02:00 UTC40m
2026-06-23 NPT2R BFS → EMA Jun 23, 22:10 UTCJun 23, 22:49 UTC40m
2026-06-23 NPT1B EMA → BFS Jun 23, 00:50 UTCJun 23, 01:30 UTC40m
2026-06-22 NPT1A - Jun 22, 20:39 UTCJun 22, 21:14 UTC35m
2026-06-18 MOG077P WRT → BFS Jun 18, 14:55 UTCJun 18, 15:35 UTC40m
2026-06-18 MOG077 AKT → WRT Jun 18, 08:20 UTCJun 18, 13:30 UTC5h 10m
2026-06-17 MOG077 AKT → AKT Jun 17, 07:35 UTCJun 17, 15:10 UTC7h 35m
2026-06-16 MOG076 WRT → AKT Jun 16, 14:15 UTCJun 16, 18:50 UTC4h 35m
2026-06-16 MOG076P EMA → WRT Jun 16, 09:40 UTCJun 16, 10:09 UTC30m
2026-06-11 NPT077P WRT → EMA Jun 11, 14:20 UTCJun 11, 14:45 UTC25m
2026-06-11 MOG077 AKT → WRT Jun 11, 08:15 UTCJun 11, 13:30 UTC5h 15m
2026-06-10 MOG076 AKT → AKT Jun 10, 07:35 UTCJun 10, 14:15 UTC6h 40m
2026-06-09 MOG076 WRT → AKT Jun 9, 14:20 UTCJun 9, 19:00 UTC4h 40m
2026-06-09 MOG76P EMA → WRT Jun 9, 10:25 UTCJun 9, 10:50 UTC25m
2026-06-04 MOG77P WRT → EMA Jun 4, 13:05 UTCJun 4, 13:35 UTC30m
2026-06-04 MOG077 AKT → WRT Jun 4, 06:00 UTCJun 4, 11:15 UTC5h 15m
2026-06-03 MOG076 AKT → AKT Jun 3, 08:50 UTCJun 3, 15:55 UTC7h 5m
2026-06-02 MOG076 WRT → AKT Jun 2, 14:45 UTCJun 2, 19:45 UTC5h 0m
2026-05-29 MOG77 AKT → WRT May 29, 07:30 UTCMay 29, 12:45 UTC5h 15m
2026-05-28 MOG76 AKT → AKT May 28, 04:35 UTCMay 28, 11:25 UTC6h 50m
2026-05-27 MOG76 WRT → AKT May 27, 10:15 UTCMay 27, 15:05 UTC4h 50m
2026-05-27 MOG76P EMA → WRT May 27, 08:00 UTCMay 27, 08:20 UTC20m
2026-05-22 NPT314F LNZ → EMA May 22, 13:35 UTCMay 22, 15:35 UTC2h 0m
2026-05-22 NPT314 - May 22, 08:35 UTCMay 22, 11:00 UTC2h 25m
2026-05-21 NPT314F EMA → MAD May 21, 13:45 UTCMay 21, 15:45 UTC2h 0m
2026-05-20 NPT2R - May 20, 22:15 UTCMay 20, 23:00 UTC45m
2026-05-20 NPT2L EMA → BFS May 20, 00:20 UTCMay 20, 01:00 UTC40m
2026-05-19 NPT2R - May 19, 22:05 UTCMay 19, 22:45 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-NPTH page for operator, model, and routing details .

Mode-S 407DCF frequently asked

What is Mode-S code 407DCF?
407DCF is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-NPTH.
Where is Mode-S 407DCF registered?
Mode-S code 407DCF 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 407DCF broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407DCF, octal 20076717, decimal 4,226,511.
What flights does 407DCF operate?
Mode-S 407DCF has broadcast 20 distinct callsigns, including NPT2L, NPT2R, NPT1B, MOG076, NPT5D.