Apparatus

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sensors Mode-S transponder

4078A3

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-POLV · PARTENAVIA P-68 Observer

Hex
4078A3
Octal
20074243
Decimal
4,225,187
Country
GB
Tail
G-POLV
Type
P68
No current signal · last broadcast 23d ago
Flights observed
79
Distinct callsigns
1
Country
GB
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S 4078A3.

Country allocation

The ICAO 24-bit address 4078A3 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
UKP155 - 79 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UKP155 EMA → EMA Jul 26, 18:50 UTCJul 26, 20:50 UTC2h 0m
2026-07-25 UKP155 EMA → EMA Jul 25, 19:00 UTCJul 25, 20:30 UTC1h 30m
2026-07-23 UKP155 EMA → EMA Jul 23, 13:45 UTCJul 23, 17:35 UTC3h 50m
2026-07-22 UKP155 - Jul 22, 18:55 UTCJul 22, 23:00 UTC4h 5m
2026-07-22 UKP155 - Jul 22, 16:55 UTCJul 22, 17:40 UTC45m
2026-07-22 UKP155 - Jul 22, 13:25 UTCJul 22, 14:20 UTC55m
2026-07-21 UKP155 EMA → EMA Jul 21, 14:00 UTCJul 21, 18:35 UTC4h 35m
2026-07-19 UKP155 EMA → EMA Jul 19, 12:10 UTCJul 19, 13:20 UTC1h 10m
2026-07-18 UKP155 EMA → EMA Jul 18, 17:45 UTCJul 18, 19:35 UTC1h 50m
2026-07-18 UKP155 EMA → EMA Jul 18, 13:05 UTCJul 18, 14:25 UTC1h 20m
2026-07-17 UKP155 EMA → EMA Jul 17, 18:15 UTCJul 17, 20:35 UTC2h 20m
2026-07-17 UKP155 EMA → EMA Jul 17, 14:15 UTCJul 17, 17:30 UTC3h 15m
2026-07-16 UKP155 EMA → EMA Jul 16, 19:55 UTCJul 16, 22:05 UTC2h 10m
2026-07-15 UKP155 CEG → EMA Jul 15, 12:45 UTCJul 15, 16:55 UTC4h 10m
2026-07-15 UKP155 EMA → CEG Jul 15, 06:40 UTCJul 15, 09:30 UTC2h 50m
2026-07-14 UKP155 - Jul 14, 19:00 UTCJul 14, 22:25 UTC3h 25m
2026-07-14 UKP155 - Jul 14, 17:05 UTCJul 14, 17:25 UTC20m
2026-07-14 UKP155 BBS → BBS Jul 14, 14:20 UTCJul 14, 15:50 UTC1h 30m
2026-07-14 UKP155 EMA → BBS Jul 14, 12:55 UTCJul 14, 13:40 UTC45m
2026-07-13 UKP155 EMA → EMA Jul 13, 21:20 UTCJul 13, 22:10 UTC50m
2026-07-13 UKP155 EMA → EMA Jul 13, 18:30 UTCJul 13, 19:15 UTC45m
2026-07-13 UKP155 EMA → EMA Jul 13, 15:00 UTCJul 13, 17:35 UTC2h 35m
2026-07-11 UKP155 EMA → EMA Jul 11, 18:00 UTCJul 11, 19:15 UTC1h 15m
2026-07-10 UKP155 EMA → EMA Jul 10, 14:15 UTCJul 10, 15:25 UTC1h 10m
2026-07-09 UKP155 - Jul 9, 18:50 UTCJul 9, 22:00 UTC3h 10m
2026-07-09 UKP155 - Jul 9, 15:25 UTCJul 9, 18:10 UTC2h 45m
2026-07-09 UKP155 - Jul 9, 13:35 UTCJul 9, 14:40 UTC1h 5m
2026-07-07 UKP155 - Jul 7, 21:10 UTCJul 8, 01:00 UTC3h 50m
2026-07-07 UKP155 EMA → OXF Jul 7, 15:00 UTCJul 7, 20:40 UTC5h 40m
2026-07-06 UKP155 EMA → EMA Jul 6, 22:00 UTCJul 6, 22:35 UTC35m
2026-07-05 UKP155 EMA → EMA Jul 5, 21:40 UTCJul 5, 22:45 UTC1h 5m
2026-06-10 UKP155 EMA → EMA Jun 10, 15:00 UTCJun 10, 17:10 UTC2h 10m
2026-06-09 UKP155 - Jun 9, 12:15 UTCJun 9, 15:50 UTC3h 35m
2026-06-08 UKP155 EMA → EMA Jun 8, 20:30 UTCJun 8, 22:05 UTC1h 35m
2026-06-08 UKP155 CEG → EMA Jun 8, 15:55 UTCJun 8, 17:25 UTC1h 30m
2026-06-08 UKP155 EMA → CEG Jun 8, 08:50 UTCJun 8, 12:20 UTC3h 30m
2026-06-07 UKP155 EMA → EMA Jun 7, 20:15 UTCJun 7, 21:35 UTC1h 20m
2026-06-07 UKP155 EMA → EMA Jun 7, 13:35 UTCJun 7, 15:55 UTC2h 20m
2026-06-06 UKP155 EMA → EMA Jun 6, 18:09 UTCJun 6, 19:44 UTC1h 35m
2026-06-06 UKP155 EMA → EMA Jun 6, 12:04 UTCJun 6, 16:34 UTC4h 30m
2026-06-05 UKP155 EMA → EMA Jun 5, 20:20 UTCJun 5, 22:25 UTC2h 5m
2026-06-05 UKP155 EMA → EMA Jun 5, 18:00 UTCJun 5, 19:00 UTC1h 0m
2026-06-05 UKP155 EMA → EMA Jun 5, 13:05 UTCJun 5, 14:55 UTC1h 50m
2026-06-04 UKP155 EMA → EMA Jun 4, 21:20 UTCJun 4, 22:40 UTC1h 20m
2026-06-04 UKP155 EMA → EMA Jun 4, 15:45 UTCJun 4, 18:45 UTC3h 0m
2026-06-03 UKP155 EMA → EMA Jun 3, 19:25 UTCJun 3, 21:05 UTC1h 40m
2026-06-03 UKP155 EMA → EMA Jun 3, 15:55 UTCJun 3, 17:00 UTC1h 5m
2026-06-03 UKP155 EMA → EMA Jun 3, 13:50 UTCJun 3, 15:05 UTC1h 15m
2026-06-02 UKP155 - Jun 2, 16:50 UTCJun 2, 18:50 UTC2h 0m
2026-06-02 UKP155 EMA → EMA Jun 2, 15:00 UTCJun 2, 16:25 UTC1h 25m

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

Mode-S 4078A3 frequently asked

What is Mode-S code 4078A3?
4078A3 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-POLV.
Where is Mode-S 4078A3 registered?
Mode-S code 4078A3 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 4078A3 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4078A3, octal 20074243, decimal 4,225,187.
What flights does 4078A3 operate?
Mode-S 4078A3 has broadcast 1 distinct callsign, including UKP155.