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 Jul 25, 00:50 UTC
Flights observed
143
Distinct callsigns
20
Country
GB
Last broadcast
Jul 25, 00:50 UTC

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 20 distinct

Callsign Airline Flights Last seen
NPT2R - 23 2026-07-23
NPT1B - 20 2026-07-25
NPT1A - 19 2026-07-24
NPT2L - 17 2026-07-23
NPT5D - 10 2026-06-01
NPT5U - 9 2026-05-29
NPT4N - 9 2026-05-30
NPT4S - 8 2026-05-29
NPT3W - 5 2026-06-30
NPT722F - 3 2026-05-30
NPT3E - 3 2026-06-29
MOG76 - 2 2026-05-21
NPT738E - 1 2026-04-23
NPT7224 - 1 2026-05-02
NPT322F - 1 2026-07-05
NPT321F - 1 2026-07-04
NPT321 - 1 2026-07-05
NPT009P - 1 2026-07-23
NPT003P - 1 2026-04-27
MOG77P - 1 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 NPT1B EMA → BFS Jul 25, 00:05 UTCJul 25, 00:50 UTC45m
2026-07-24 NPT1A - Jul 24, 20:35 UTCJul 24, 21:15 UTC40m
2026-07-23 NPT1B EMA → BFS Jul 23, 23:50 UTCJul 24, 00:30 UTC40m
2026-07-23 - - Jul 23, 10:35 UTCJul 23, 11:15 UTC40m
2026-07-23 - - Jul 23, 10:05 UTCJul 23, 10:30 UTC25m
2026-07-23 - EMA → EMA Jul 23, 08:50 UTCJul 23, 09:30 UTC40m
2026-07-23 - EMA → EMA Jul 23, 08:20 UTCJul 23, 08:35 UTC15m
2026-07-23 NPT009P - Jul 23, 03:15 UTCJul 23, 03:55 UTC40m
2026-07-23 NPT2L EMA → BFS Jul 23, 01:40 UTCJul 23, 02:20 UTC40m
2026-07-23 NPT2R - Jul 23, 00:10 UTCJul 23, 00:50 UTC40m
2026-07-22 NPT1B EMA → BFS Jul 22, 22:25 UTCJul 22, 23:05 UTC40m
2026-07-22 NPT1A - Jul 22, 20:25 UTCJul 22, 21:10 UTC45m
2026-07-22 NPT1B EMA → BFS Jul 22, 00:00 UTCJul 22, 00:40 UTC40m
2026-07-21 NPT1A - Jul 21, 20:30 UTCJul 21, 21:10 UTC40m
2026-07-21 NPT1B EMA → BFS Jul 21, 00:00 UTCJul 21, 00:45 UTC45m
2026-07-20 NPT1A BFS → EMA Jul 20, 20:30 UTCJul 20, 21:10 UTC40m
2026-07-17 NPT1B EMA → BFS Jul 17, 23:50 UTCJul 18, 00:29 UTC40m
2026-07-17 NPT1A - Jul 17, 20:35 UTCJul 17, 21:15 UTC40m
2026-07-17 NPT2L EMA → BFS Jul 17, 01:35 UTCJul 17, 02:15 UTC40m
2026-07-16 NPT2R - Jul 16, 22:05 UTCJul 16, 22:45 UTC40m
2026-07-15 NPT1B EMA → BFS Jul 15, 23:50 UTCJul 16, 00:30 UTC40m
2026-07-15 NPT1A - Jul 15, 20:40 UTCJul 15, 21:20 UTC40m
2026-07-15 NPT1B EMA → BFS Jul 15, 00:05 UTCJul 15, 00:45 UTC40m
2026-07-14 NPT1A - Jul 14, 20:45 UTCJul 14, 21:25 UTC40m
2026-07-14 NPT1B EMA → BFS Jul 14, 00:10 UTCJul 14, 00:50 UTC40m
2026-07-13 NPT1A - Jul 13, 20:50 UTCJul 13, 21:30 UTC40m
2026-07-11 NPT2L EMA → BFS Jul 11, 01:30 UTCJul 11, 02:10 UTC40m
2026-07-10 NPT2R - Jul 10, 23:05 UTCJul 10, 23:45 UTC40m
2026-07-09 NPT2R EMA → BFS Jul 9, 01:35 UTCJul 9, 02:15 UTC40m
2026-07-08 NPT2R BFS → EMA Jul 8, 22:35 UTCJul 8, 23:20 UTC45m
2026-07-07 NPT2R - Jul 7, 22:15 UTCJul 7, 22:40 UTC25m
2026-07-07 NPT2L EMA → BFS Jul 7, 00:20 UTCJul 7, 01:10 UTC50m
2026-07-06 NPT2R - Jul 6, 22:15 UTCJul 6, 22:55 UTC40m
2026-07-05 NPT322F MLA → BFS Jul 5, 17:50 UTCJul 5, 21:35 UTC3h 45m
2026-07-05 NPT321 - Jul 5, 13:50 UTCJul 5, 16:40 UTC2h 50m
2026-07-04 NPT321F - Jul 4, 01:45 UTCJul 4, 02:20 UTC35m
2026-07-03 NPT1B EMA → BFS Jul 3, 23:55 UTCJul 4, 00:35 UTC40m
2026-07-03 NPT1A BFS → EMA Jul 3, 20:50 UTCJul 3, 21:30 UTC40m
2026-07-03 NPT2L EMA → BFS Jul 3, 01:30 UTCJul 3, 02:10 UTC40m
2026-07-02 NPT2R - Jul 2, 22:10 UTCJul 2, 22:50 UTC40m
2026-07-02 NPT2R EMA → BFS Jul 2, 01:40 UTCJul 2, 02:20 UTC40m
2026-07-01 NPT2R - Jul 1, 22:10 UTCJul 1, 22:45 UTC35m
2026-07-01 NPT2R EMA → BFS Jul 1, 01:35 UTCJul 1, 02:15 UTC40m
2026-06-30 NPT2R - Jun 30, 22:05 UTCJun 30, 22:45 UTC40m
2026-06-30 NPT3W EMA → BFS Jun 30, 01:35 UTCJun 30, 02:15 UTC40m
2026-06-29 NPT3E - Jun 29, 23:19 UTCJun 30, 00:00 UTC40m
2026-06-27 NPT2L EMA → BFS Jun 27, 00:25 UTCJun 27, 01:04 UTC40m
2026-06-26 NPT2R - Jun 26, 22:10 UTCJun 26, 22:55 UTC45m
2026-06-26 NPT3W EMA → BFS Jun 26, 01:29 UTCJun 26, 02:09 UTC40m
2026-06-24 1A - Jun 24, 20:40 UTCJun 24, 21:19 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-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 Jul 25, 00:50 UTC.
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 20 distinct callsigns, including NPT2R, NPT1B, NPT1A, NPT2L, NPT5D.