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sensors Mode-S transponder

402142

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-LFSA · PIPER PA-38 Tomahawk

Hex
402142
Octal
20020502
Decimal
4,202,818
Country
GB
Tail
G-LFSA
Type
PA38
No current signal · last broadcast 6d ago
Flights observed
63
Distinct callsigns
1
Country
GB
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S 402142.

Country allocation

The ICAO 24-bit address 402142 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 1 distinct

Callsign Airline Flights Last seen
GLFSA - 63 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 GLFSA - Jul 25, 12:25 UTCJul 25, 12:55 UTC30m
2026-07-25 GLFSA - Jul 25, 08:50 UTCJul 25, 09:10 UTC20m
2026-07-25 GLFSA - Jul 25, 08:15 UTCJul 25, 08:45 UTC30m
2026-07-24 GLFSA - Jul 24, 11:55 UTCJul 24, 12:55 UTC1h 0m
2026-07-24 GLFSA - Jul 24, 09:00 UTCJul 24, 10:05 UTC1h 5m
2026-07-23 GLFSA - Jul 23, 14:25 UTCJul 23, 15:05 UTC40m
2026-07-20 GLFSA - Jul 20, 08:50 UTCJul 20, 09:30 UTC40m
2026-07-17 GLFSA - Jul 17, 13:20 UTCJul 17, 14:20 UTC1h 0m
2026-07-09 GLFSA - Jul 9, 14:40 UTCJul 9, 14:55 UTC15m
2026-07-02 GLFSA - Jul 2, 15:20 UTCJul 2, 16:10 UTC50m
2026-07-02 GLFSA - Jul 2, 13:50 UTCJul 2, 14:25 UTC35m
2026-07-02 GLFSA - Jul 2, 10:55 UTCJul 2, 11:55 UTC1h 0m
2026-07-02 GLFSA - Jul 2, 08:25 UTCJul 2, 09:25 UTC1h 0m
2026-07-01 GLFSA - Jul 1, 14:25 UTCJul 1, 16:05 UTC1h 40m
2026-07-01 GLFSA - Jul 1, 10:30 UTCJul 1, 12:00 UTC1h 30m
2026-06-30 GLFSA LPL → LPL Jun 30, 14:35 UTCJun 30, 15:10 UTC35m
2026-06-30 GLFSA - Jun 30, 12:35 UTCJun 30, 13:25 UTC50m
2026-06-30 GLFSA LPL → LPL Jun 30, 10:20 UTCJun 30, 11:15 UTC55m
2026-06-30 GLFSA - Jun 30, 08:55 UTCJun 30, 09:15 UTC20m
2026-06-30 GLFSA - Jun 30, 08:30 UTCJun 30, 08:50 UTC20m
2026-06-29 GLFSA - Jun 29, 16:44 UTCJun 29, 16:55 UTC10m
2026-06-29 GLFSA - Jun 29, 16:29 UTCJun 29, 16:39 UTC10m
2026-06-29 GLFSA - Jun 29, 10:55 UTCJun 29, 11:20 UTC25m
2026-06-29 GLFSA - Jun 29, 08:50 UTCJun 29, 10:10 UTC1h 20m
2026-06-28 GLFSA - Jun 28, 15:09 UTCJun 28, 15:34 UTC25m
2026-06-28 GLFSA LPL → LPL Jun 28, 14:34 UTCJun 28, 14:50 UTC15m
2026-06-28 GLFSA - Jun 28, 13:34 UTCJun 28, 13:55 UTC20m
2026-06-28 GLFSA - Jun 28, 13:19 UTCJun 28, 13:29 UTC10m
2026-06-28 GLFSA - Jun 28, 13:00 UTCJun 28, 13:14 UTC15m
2026-06-28 GLFSA LPL → LPL Jun 28, 10:24 UTCJun 28, 11:04 UTC40m
2026-06-28 GLFSA - Jun 28, 08:09 UTCJun 28, 08:59 UTC50m
2026-06-27 GLFSA - Jun 27, 11:20 UTCJun 27, 11:44 UTC25m
2026-06-27 GLFSA - Jun 27, 10:40 UTCJun 27, 11:14 UTC35m
2026-06-27 GLFSA CEG → LPL Jun 27, 08:44 UTCJun 27, 09:00 UTC15m
2026-06-27 GLFSA - Jun 27, 08:05 UTCJun 27, 08:39 UTC35m
2026-06-26 GLFSA - Jun 26, 13:45 UTCJun 26, 14:44 UTC1h 0m
2026-06-26 GLFSA - Jun 26, 11:30 UTCJun 26, 11:55 UTC25m
2026-06-26 GLFSA - Jun 26, 10:39 UTCJun 26, 11:24 UTC45m
2026-06-25 GLFSA LPL → LPL Jun 25, 10:39 UTCJun 25, 11:10 UTC30m
2026-06-25 GLFSA - Jun 25, 08:40 UTCJun 25, 08:55 UTC15m
2026-06-25 GLFSA - Jun 25, 08:24 UTCJun 25, 08:34 UTC10m
2026-06-25 GLFSA - Jun 25, 07:59 UTCJun 25, 08:14 UTC15m
2026-06-24 GLFSA LPL → LPL Jun 24, 13:50 UTCJun 24, 14:29 UTC40m
2026-06-24 GLFSA - Jun 24, 10:49 UTCJun 24, 11:54 UTC1h 5m
2026-06-23 GLFSA - Jun 23, 14:25 UTCJun 23, 15:19 UTC55m
2026-06-23 GLFSA - Jun 23, 10:24 UTCJun 23, 11:59 UTC1h 35m
2026-06-23 GLFSA - Jun 23, 08:20 UTCJun 23, 09:24 UTC1h 5m
2026-06-22 GLFSA BLK → LPL Jun 22, 13:59 UTCJun 22, 14:29 UTC30m
2026-06-22 GLFSA - Jun 22, 12:44 UTCJun 22, 13:05 UTC20m
2026-06-21 GLFSA - Jun 21, 14:44 UTCJun 21, 15:44 UTC1h 0m

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

Mode-S 402142 frequently asked

What is Mode-S code 402142?
402142 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-LFSA.
Where is Mode-S 402142 registered?
Mode-S code 402142 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 402142 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 402142, octal 20020502, decimal 4,202,818.
What flights does 402142 operate?
Mode-S 402142 has broadcast 1 distinct callsign, including GLFSA.