Apparatus

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sensors Mode-S transponder

4082F4

ICAO 24-bit transponder address · allocated to United Kingdom

Hex
4082F4
Octal
20101364
Decimal
4,227,828
Country
GB
No current signal · last broadcast 2h ago
Flights observed
71
Distinct callsigns
13
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4082F4.

Country allocation

The ICAO 24-bit address 4082F4 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 13 distinct

Callsign Airline Flights Last seen
NPT4S - 23 2026-06-22
NPT4N - 19 2026-06-23
NPT722F - 5 2026-06-20
NPT7224 - 5 2026-06-20
NPT1B - 5 2026-06-09
NPT1A - 5 2026-06-09
NPT5U - 2 2026-05-19
NPT5D - 1 2026-05-18
NPT315F - 1 2026-06-07
NPT315 - 1 2026-06-07
NPT04S - 1 2026-06-16
GNPTG - 1 2026-04-26
BOE1234 - 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-23 NPT4N EMA → EDI Jun 23, 01:15 UTCJun 23, 01:54 UTC40m
2026-06-22 NPT4S EDI → EMA Jun 22, 23:29 UTCJun 23, 00:09 UTC40m
2026-06-20 NPT7224 EMA → EDI Jun 20, 04:34 UTCJun 20, 05:19 UTC45m
2026-06-20 NPT722F EDI → EMA Jun 20, 02:19 UTCJun 20, 03:04 UTC45m
2026-06-20 NPT4N EMA → EDI Jun 20, 00:19 UTCJun 20, 01:05 UTC45m
2026-06-19 NPT4S EDI → EMA Jun 19, 22:34 UTCJun 19, 23:19 UTC45m
2026-06-19 NPT4N EMA → EDI Jun 19, 00:29 UTCJun 19, 01:15 UTC45m
2026-06-18 NPT4S EDI → EMA Jun 18, 22:10 UTCJun 18, 22:55 UTC45m
2026-06-18 NPT4N EMA → EDI Jun 18, 00:40 UTCJun 18, 01:25 UTC45m
2026-06-17 NPT4S EDI → EMA Jun 17, 22:15 UTCJun 17, 23:00 UTC45m
2026-06-17 NPT4N EMA → EDI Jun 17, 00:35 UTCJun 17, 01:15 UTC40m
2026-06-16 NPT04S EDI → EMA Jun 16, 22:05 UTCJun 16, 22:45 UTC40m
2026-06-16 NPT4N EMA → EDI Jun 16, 00:40 UTCJun 16, 01:19 UTC40m
2026-06-15 NPT4S EDI → EMA Jun 15, 22:15 UTCJun 15, 22:59 UTC45m
2026-06-13 NPT7224 - Jun 13, 04:40 UTCJun 13, 05:25 UTC45m
2026-06-13 NPT722F EDI → EMA Jun 13, 03:25 UTCJun 13, 04:00 UTC34m
2026-06-13 NPT4S EMA → EDI Jun 13, 00:20 UTCJun 13, 01:10 UTC50m
2026-06-12 NPT4S EDI → EMA Jun 12, 22:15 UTCJun 12, 22:55 UTC40m
2026-06-12 NPT4N EMA → EDI Jun 12, 00:30 UTCJun 12, 01:10 UTC40m
2026-06-11 NPT4S EDI → EMA Jun 11, 22:10 UTCJun 11, 22:55 UTC45m
2026-06-11 NPT4N EMA → EDI Jun 11, 00:30 UTCJun 11, 01:15 UTC45m
2026-06-10 NPT4S EDI → EMA Jun 10, 22:15 UTCJun 10, 22:50 UTC35m
2026-06-10 NPT4N EMA → EDI Jun 10, 00:45 UTCJun 10, 01:25 UTC40m
2026-06-09 NPT1A - Jun 9, 20:20 UTCJun 9, 21:05 UTC45m
2026-06-09 NPT1B EMA → BFS Jun 9, 00:00 UTCJun 9, 00:45 UTC45m
2026-06-08 NPT1A - Jun 8, 21:55 UTCJun 8, 23:00 UTC1h 5m
2026-06-07 NPT315 - Jun 7, 12:05 UTCJun 7, 15:55 UTC3h 50m
2026-06-07 NPT315F - Jun 7, 06:20 UTCJun 7, 10:00 UTC3h 40m
2026-06-06 NPT1B EMA → BFS Jun 6, 00:00 UTCJun 6, 00:35 UTC35m
2026-06-05 NPT1A - Jun 5, 20:45 UTCJun 5, 21:25 UTC40m
2026-06-05 NPT1B EMA → BFS Jun 5, 00:15 UTCJun 5, 00:55 UTC40m
2026-06-04 NPT4S EDI → EMA Jun 4, 22:05 UTCJun 4, 22:45 UTC40m
2026-06-04 NPT4N EMA → EDI Jun 4, 00:30 UTCJun 4, 01:10 UTC40m
2026-06-03 NPT4S EDI → EMA Jun 3, 22:00 UTCJun 3, 22:45 UTC45m
2026-06-03 NPT4S EMA → EDI Jun 3, 00:50 UTCJun 3, 01:35 UTC45m
2026-06-02 NPT4S EDI → EMA Jun 2, 22:00 UTCJun 2, 22:40 UTC40m
2026-06-02 NPT4N EMA → EDI Jun 2, 00:30 UTCJun 2, 01:10 UTC40m
2026-05-28 NPT4S EDI → EMA May 28, 22:10 UTCMay 28, 23:00 UTC50m
2026-05-28 NPT4N EMA → EDI May 28, 00:40 UTCMay 28, 01:25 UTC45m
2026-05-27 NPT4S - May 27, 22:15 UTCMay 27, 23:00 UTC45m
2026-05-27 NPT4N EMA → EDI May 27, 00:55 UTCMay 27, 01:34 UTC40m
2026-05-26 NPT4S - May 26, 22:20 UTCMay 26, 22:59 UTC40m
2026-05-23 NPT7224 EMA → EDI May 23, 04:40 UTCMay 23, 05:25 UTC45m
2026-05-23 NPT722F EDI → EMA May 23, 02:35 UTCMay 23, 03:15 UTC40m
2026-05-23 NPT4N EMA → EDI May 23, 00:40 UTCMay 23, 01:20 UTC40m
2026-05-22 NPT1A BFS → EMA May 22, 20:40 UTCMay 22, 21:25 UTC45m
2026-05-21 NPT1B EMA → BFS May 21, 23:55 UTCMay 22, 00:35 UTC40m
2026-05-21 NPT1A - May 21, 20:30 UTCMay 21, 21:10 UTC40m
2026-05-21 NPT1B EMA → BFS May 21, 00:05 UTCMay 21, 00:50 UTC45m
2026-05-20 NPT4S EDI → EMA May 20, 22:15 UTCMay 20, 23:00 UTC45m

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.

Mode-S 4082F4 frequently asked

What is Mode-S code 4082F4?
4082F4 is an ICAO 24-bit transponder address. Allocated to United Kingdom.
Where is Mode-S 4082F4 registered?
Mode-S code 4082F4 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 4082F4 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4082F4, octal 20101364, decimal 4,227,828.
What flights does 4082F4 operate?
Mode-S 4082F4 has broadcast 13 distinct callsigns, including NPT4S, NPT4N, NPT722F, NPT7224, NPT1B.