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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 Jul 24, 00:20 UTC
Flights observed
117
Distinct callsigns
20
Country
GB
Last broadcast
Jul 24, 00:20 UTC

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
SWT4904 - 16 2026-07-23
SWT4804 - 15 2026-07-23
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
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
NPT905 - 1 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 SWT4904 - Jul 23, 23:15 UTCJul 24, 00:15 UTC1h 0m
2026-07-23 SWT4904 - Jul 23, 20:25 UTCJul 23, 21:50 UTC1h 25m
2026-07-23 SWT4804 - Jul 23, 16:55 UTCJul 23, 18:20 UTC1h 25m
2026-07-23 SWT4804 - Jul 23, 15:10 UTCJul 23, 16:05 UTC55m
2026-07-22 SWT4904 - Jul 22, 23:15 UTCJul 23, 00:20 UTC1h 5m
2026-07-22 SWT4904 - Jul 22, 20:35 UTCJul 22, 22:00 UTC1h 25m
2026-07-22 SWT4804 - Jul 22, 17:05 UTCJul 22, 18:45 UTC1h 40m
2026-07-22 SWT4804 - Jul 22, 15:10 UTCJul 22, 16:10 UTC1h 0m
2026-07-21 SWT4904 - Jul 21, 23:30 UTCJul 22, 00:30 UTC1h 0m
2026-07-21 SWT4904 - Jul 21, 20:55 UTCJul 21, 22:20 UTC1h 25m
2026-07-21 SWT4804 - Jul 21, 18:00 UTCJul 21, 19:35 UTC1h 35m
2026-07-21 SWT4804 - Jul 21, 15:15 UTCJul 21, 16:10 UTC55m
2026-07-20 SWT4904 - Jul 20, 23:15 UTCJul 21, 00:15 UTC59m
2026-07-20 SWT4904 - Jul 20, 20:25 UTCJul 20, 21:50 UTC1h 25m
2026-07-20 SWT4804 - Jul 20, 17:05 UTCJul 20, 18:35 UTC1h 30m
2026-07-20 SWT4804 - Jul 20, 15:15 UTCJul 20, 16:10 UTC55m
2026-07-16 SWT4904 - Jul 16, 23:29 UTCJul 17, 00:30 UTC1h 0m
2026-07-16 SWT4904 - Jul 16, 20:35 UTCJul 16, 21:55 UTC1h 20m
2026-07-16 SWT4804 - Jul 16, 17:05 UTCJul 16, 18:40 UTC1h 35m
2026-07-16 SWT4804 - Jul 16, 15:14 UTCJul 16, 16:09 UTC55m
2026-07-15 SWT4904 - Jul 15, 23:30 UTCJul 16, 00:30 UTC1h 0m
2026-07-15 SWT4904 - Jul 15, 20:45 UTCJul 15, 22:10 UTC1h 25m
2026-07-15 SWT4804 - Jul 15, 18:00 UTCJul 15, 18:55 UTC55m
2026-07-15 SWT4804 - Jul 15, 17:15 UTCJul 15, 17:55 UTC40m
2026-07-15 SWT4804 - Jul 15, 15:20 UTCJul 15, 16:10 UTC50m
2026-07-14 SWT4904 - Jul 14, 23:25 UTCJul 15, 00:25 UTC1h 0m
2026-07-14 SWT4904 - Jul 14, 20:35 UTCJul 14, 22:00 UTC1h 25m
2026-07-14 SWT4804 - Jul 14, 17:40 UTCJul 14, 19:15 UTC1h 35m
2026-07-14 SWT4804 - Jul 14, 15:40 UTCJul 14, 16:35 UTC55m
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

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 Jul 24, 00:20 UTC.
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 SWT4904, SWT4804, NPT2L, NPT2R, NPT1B.