Apparatus

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sensors Mode-S transponder

408315

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-NPTI · BOEING 737-800

Hex
408315
Octal
20101425
Decimal
4,227,861
Country
GB
Tail
G-NPTI
Type
B738
No current signal · last broadcast 3h ago
Flights observed
63
Distinct callsigns
17
Country
GB
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 408315.

Country allocation

The ICAO 24-bit address 408315 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 17 distinct

Callsign Airline Flights Last seen
NPT5U - 9 2026-05-29
NPT5D - 9 2026-05-28
NPT4N - 9 2026-05-30
NPT4S - 8 2026-05-29
NPT1A - 7 2026-04-21
NPT1B - 5 2026-04-21
NPT722F - 3 2026-05-30
NPT3W - 2 2026-05-20
NPT3E - 2 2026-05-20
MOG76 - 2 2026-05-21
NPT738E - 1 2026-04-23
NPT7224 - 1 2026-05-02
NPT2R - 1 2026-04-28
NPT003P - 1 2026-04-27
MOG77P - 1 2026-05-22
MOG77 - 1 2026-05-22
MOG76P - 1 2026-05-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 NPT722F EMA → EDI May 30, 05:05 UTCMay 30, 05:45 UTC40m
2026-05-30 NPT722F EDI → EMA May 30, 02:25 UTCMay 30, 03:05 UTC40m
2026-05-30 NPT4N EMA → EDI May 30, 00:30 UTCMay 30, 01:15 UTC45m
2026-05-29 NPT4S EDI → EMA May 29, 22:10 UTCMay 29, 22:55 UTC45m
2026-05-29 NPT5U EMA → EDI May 29, 01:35 UTCMay 29, 02:15 UTC40m
2026-05-28 NPT5D EDI → EMA May 28, 22:45 UTCMay 28, 23:30 UTC45m
2026-05-28 NPT5U EMA → EDI May 28, 01:40 UTCMay 28, 02:20 UTC40m
2026-05-27 NPT5D EDI → EMA May 27, 23:00 UTCMay 27, 23:40 UTC40m
2026-05-27 NPT5U EMA → EDI May 27, 01:49 UTCMay 27, 02:29 UTC40m
2026-05-26 NPT5D EDI → EMA May 26, 23:05 UTCMay 26, 23:45 UTC40m
2026-05-23 NPT5U EMA → EDI May 23, 01:25 UTCMay 23, 02:10 UTC45m
2026-05-22 MOG77P WRT → EMA May 22, 12:05 UTCMay 22, 12:30 UTC25m
2026-05-22 MOG77 AKT → WRT May 22, 06:15 UTCMay 22, 11:10 UTC4h 55m
2026-05-21 MOG76 AKT → AKT May 21, 02:55 UTCMay 21, 10:10 UTC7h 15m
2026-05-20 MOG76 WRT → AKT May 20, 09:10 UTCMay 20, 13:45 UTC4h 35m
2026-05-20 MOG76P EMA → WRT May 20, 06:45 UTCMay 20, 07:15 UTC30m
2026-05-20 NPT3E BFS → EMA May 20, 02:55 UTCMay 20, 03:40 UTC45m
2026-05-20 NPT3W EMA → BFS May 20, 01:20 UTCMay 20, 02:05 UTC45m
2026-05-19 NPT5D - May 19, 22:55 UTCMay 19, 23:40 UTC45m
2026-05-19 NPT4N EMA → EDI May 19, 00:30 UTCMay 19, 01:05 UTC35m
2026-05-18 NPT4S EDI → EMA May 18, 22:15 UTCMay 18, 23:05 UTC50m
2026-05-16 NPT5U EMA → EDI May 16, 00:50 UTCMay 16, 01:40 UTC50m
2026-05-15 NPT5D EDI → EMA May 15, 22:45 UTCMay 15, 23:25 UTC40m
2026-05-15 NPT5U EMA → EDI May 15, 01:05 UTCMay 15, 01:50 UTC45m
2026-05-14 NPT5D EDI → EMA May 14, 22:55 UTCMay 14, 23:35 UTC40m
2026-05-14 NPT5U EMA → EDI May 14, 01:20 UTCMay 14, 02:00 UTC40m
2026-05-13 NPT5D EDI → EMA May 13, 22:55 UTCMay 13, 23:35 UTC40m
2026-05-13 NPT5U EMA → EDI May 13, 01:15 UTCMay 13, 02:00 UTC45m
2026-05-12 NPT5D EDI → EMA May 12, 22:55 UTCMay 12, 23:40 UTC45m
2026-05-09 NPT5U EMA → EDI May 9, 01:20 UTCMay 9, 02:00 UTC40m
2026-05-08 NPT5D EDI → EMA May 8, 22:45 UTCMay 8, 23:30 UTC45m
2026-05-08 NPT4N EMA → EDI May 8, 00:34 UTCMay 8, 01:19 UTC45m
2026-05-07 NPT4S EDI → EMA May 7, 22:05 UTCMay 7, 22:45 UTC40m
2026-05-07 NPT4N EMA → EDI May 7, 00:35 UTCMay 7, 01:20 UTC45m
2026-05-06 NPT4S EDI → EMA May 6, 22:10 UTCMay 6, 22:50 UTC40m
2026-05-06 NPT4N EMA → EDI May 6, 00:40 UTCMay 6, 01:20 UTC40m
2026-05-05 NPT4S EDI → EMA May 5, 22:15 UTCMay 5, 23:05 UTC50m
2026-05-02 NPT7224 EMA → EDI May 2, 04:25 UTCMay 2, 05:10 UTC45m
2026-05-02 NPT722F EDI → EMA May 2, 02:25 UTCMay 2, 03:10 UTC45m
2026-05-02 NPT4N EMA → EDI May 2, 00:30 UTCMay 2, 01:10 UTC40m
2026-05-01 NPT4S EDI → EMA May 1, 22:10 UTCMay 1, 23:00 UTC50m
2026-05-01 NPT4N EMA → EDI May 1, 00:50 UTCMay 1, 01:25 UTC35m
2026-04-30 NPT4S EDI → EMA Apr 30, 22:10 UTCApr 30, 23:00 UTC50m
2026-04-30 NPT4N EMA → EDI Apr 30, 00:35 UTCApr 30, 01:15 UTC40m
2026-04-29 NPT4S EDI → EMA Apr 29, 22:20 UTCApr 29, 23:05 UTC44m
2026-04-29 NPT4N EMA → EDI Apr 29, 00:40 UTCApr 29, 01:20 UTC40m
2026-04-28 NPT2R - Apr 28, 22:30 UTCApr 28, 23:14 UTC45m
2026-04-28 NPT3W EMA → BFS Apr 28, 01:35 UTCApr 28, 02:55 UTC1h 20m
2026-04-27 NPT003P - Apr 27, 18:35 UTCApr 27, 20:35 UTC2h 0m
2026-04-23 NPT738E - Apr 23, 03:30 UTCApr 23, 05:35 UTC2h 5m

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

Mode-S 408315 frequently asked

What is Mode-S code 408315?
408315 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-NPTI.
Where is Mode-S 408315 registered?
Mode-S code 408315 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 408315 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408315, octal 20101425, decimal 4,227,861.
What flights does 408315 operate?
Mode-S 408315 has broadcast 17 distinct callsigns, including NPT5U, NPT5D, NPT4N, NPT4S, NPT1A.