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sensors Mode-S transponder

402C73

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BPAF · PIPER PA-28-140/150/160/180

Hex
402C73
Octal
20026163
Decimal
4,205,683
Country
GB
Tail
G-BPAF
Type
P28A
No current signal · last broadcast 3h ago
Flights observed
135
Distinct callsigns
1
Country
GB
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 402C73.

Country allocation

The ICAO 24-bit address 402C73 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
GBPAF - 135 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 GBPAF - Jul 16, 15:35 UTCJul 16, 16:09 UTC35m
2026-07-15 GBPAF - Jul 15, 18:10 UTCJul 15, 18:55 UTC45m
2026-07-15 GBPAF GBA → GBA Jul 15, 10:15 UTCJul 15, 14:00 UTC3h 45m
2026-07-14 GBPAF - Jul 14, 14:55 UTCJul 14, 15:35 UTC40m
2026-07-14 GBPAF - Jul 14, 11:45 UTCJul 14, 12:40 UTC55m
2026-07-14 GBPAF - Jul 14, 09:50 UTCJul 14, 09:55 UTC5m
2026-07-13 GBPAF - Jul 13, 16:10 UTCJul 13, 17:25 UTC1h 15m
2026-07-13 GBPAF - Jul 13, 10:15 UTCJul 13, 11:05 UTC50m
2026-07-13 GBPAF - Jul 13, 08:10 UTCJul 13, 08:50 UTC40m
2026-07-12 GBPAF - Jul 12, 09:20 UTCJul 12, 09:55 UTC35m
2026-07-11 GBPAF - Jul 11, 16:05 UTCJul 11, 17:05 UTC1h 0m
2026-07-11 GBPAF - Jul 11, 10:30 UTCJul 11, 11:20 UTC50m
2026-07-10 GBPAF - Jul 10, 10:40 UTCJul 10, 13:30 UTC2h 50m
2026-07-10 GBPAF - Jul 10, 08:25 UTCJul 10, 09:10 UTC45m
2026-07-09 GBPAF - Jul 9, 16:00 UTCJul 9, 16:50 UTC50m
2026-07-09 GBPAF - Jul 9, 12:05 UTCJul 9, 12:50 UTC45m
2026-07-09 GBPAF - Jul 9, 10:15 UTCJul 9, 10:55 UTC40m
2026-07-08 GBPAF GBA → GBA Jul 8, 18:00 UTCJul 8, 18:55 UTC55m
2026-07-08 GBPAF - Jul 8, 12:30 UTCJul 8, 13:15 UTC45m
2026-07-08 GBPAF - Jul 8, 08:45 UTCJul 8, 09:35 UTC50m
2026-07-07 GBPAF - Jul 7, 14:45 UTCJul 7, 15:50 UTC1h 5m
2026-07-07 GBPAF - Jul 7, 12:50 UTCJul 7, 13:40 UTC50m
2026-07-07 GBPAF - Jul 7, 09:30 UTCJul 7, 09:45 UTC15m
2026-07-05 GBPAF GBA → GBA Jul 5, 10:20 UTCJul 5, 11:25 UTC1h 5m
2026-07-04 GBPAF - Jul 4, 13:20 UTCJul 4, 14:40 UTC1h 20m
2026-07-04 GBPAF - Jul 4, 10:55 UTCJul 4, 12:00 UTC1h 5m
2026-07-03 GBPAF GBA → GBA Jul 3, 14:50 UTCJul 3, 15:10 UTC20m
2026-07-03 GBPAF - Jul 3, 13:05 UTCJul 3, 13:45 UTC40m
2026-07-03 GBPAF - Jul 3, 11:20 UTCJul 3, 11:50 UTC30m
2026-07-02 GBPAF - Jul 2, 15:40 UTCJul 2, 17:35 UTC1h 55m
2026-07-02 GBPAF - Jul 2, 14:00 UTCJul 2, 14:30 UTC30m
2026-07-02 GBPAF - Jul 2, 12:45 UTCJul 2, 13:20 UTC35m
2026-07-02 GBPAF - Jul 2, 10:00 UTCJul 2, 10:50 UTC50m
2026-07-01 GBPAF - Jul 1, 15:00 UTCJul 1, 15:40 UTC40m
2026-07-01 GBPAF - Jul 1, 13:10 UTCJul 1, 14:00 UTC50m
2026-07-01 GBPAF - Jul 1, 11:50 UTCJul 1, 12:30 UTC40m
2026-06-30 GBPAF - Jun 30, 13:40 UTCJun 30, 14:30 UTC50m
2026-06-30 GBPAF - Jun 30, 11:40 UTCJun 30, 12:30 UTC50m
2026-06-30 GBPAF - Jun 30, 10:10 UTCJun 30, 10:45 UTC35m
2026-06-29 GBPAF - Jun 29, 12:49 UTCJun 29, 16:04 UTC3h 15m
2026-06-29 GBPAF - Jun 29, 09:05 UTCJun 29, 10:44 UTC1h 40m
2026-06-28 GBPAF - Jun 28, 14:50 UTCJun 28, 15:14 UTC25m
2026-06-28 GBPAF - Jun 28, 12:09 UTCJun 28, 12:35 UTC25m
2026-06-28 GBPAF - Jun 28, 08:50 UTCJun 28, 09:45 UTC55m
2026-06-27 GBPAF - Jun 27, 11:04 UTCJun 27, 14:14 UTC3h 10m
2026-06-27 GBPAF GBA → BYF Jun 27, 07:24 UTCJun 27, 09:44 UTC2h 20m
2026-06-26 GBPAF - Jun 26, 10:44 UTCJun 26, 11:45 UTC1h 0m
2026-06-26 GBPAF - Jun 26, 08:54 UTCJun 26, 09:30 UTC35m
2026-06-25 GBPAF - Jun 25, 11:25 UTCJun 25, 11:50 UTC25m
2026-06-25 GBPAF - Jun 25, 09:10 UTCJun 25, 09:45 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-BPAF page for operator, model, and routing details .

Mode-S 402C73 frequently asked

What is Mode-S code 402C73?
402C73 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BPAF.
Where is Mode-S 402C73 registered?
Mode-S code 402C73 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 402C73 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 402C73, octal 20026163, decimal 4,205,683.
What flights does 402C73 operate?
Mode-S 402C73 has broadcast 1 distinct callsign, including GBPAF.