Apparatus

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sensors Mode-S transponder

4077FC

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
4077FC
Octal
20073774
Decimal
4,225,020
Country
GB
Tail
G-POLZ
Type
P68
No current signal · last broadcast 3d ago
Flights observed
39
Distinct callsigns
1
Country
GB
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 4077FC.

Country allocation

The ICAO 24-bit address 4077FC 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
UKP152 - 39 2026-06-12

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-06-12 UKP152 EMA → EMA Jun 12, 13:25 UTCJun 12, 18:10 UTC4h 45m
2026-06-11 UKP152 EMA → EMA Jun 11, 17:50 UTCJun 11, 20:50 UTC3h 0m
2026-06-11 UKP152 EMA → EMA Jun 11, 16:10 UTCJun 11, 16:55 UTC45m
2026-06-10 UKP152 EMA → EMA Jun 10, 19:30 UTCJun 10, 20:25 UTC55m
2026-06-10 UKP152 EMA → EMA Jun 10, 13:35 UTCJun 10, 17:45 UTC4h 10m
2026-06-09 UKP152 EMA → EMA Jun 9, 19:25 UTCJun 9, 21:20 UTC1h 55m
2026-06-09 UKP152 - Jun 9, 16:45 UTCJun 9, 17:00 UTC15m
2026-06-09 UKP152 - Jun 9, 14:00 UTCJun 9, 15:50 UTC1h 50m
2026-06-08 UKP152 EMA → EMA Jun 8, 14:40 UTCJun 8, 17:00 UTC2h 20m
2026-06-04 UKP152 EMA → EMA Jun 4, 18:20 UTCJun 4, 19:55 UTC1h 35m
2026-06-04 UKP152 EMA → EMA Jun 4, 14:00 UTCJun 4, 15:35 UTC1h 35m
2026-06-03 UKP152 EMA → EMA Jun 3, 20:20 UTCJun 3, 22:15 UTC1h 55m
2026-06-02 UKP152 EMA → EMA Jun 2, 22:15 UTCJun 2, 23:05 UTC50m
2026-06-02 UKP152 - Jun 2, 17:45 UTCJun 2, 20:20 UTC2h 35m
2026-05-29 UKP152 CEG → EMA May 29, 17:20 UTCMay 29, 20:10 UTC2h 50m
2026-05-29 UKP152 EMA → CEG May 29, 14:30 UTCMay 29, 16:25 UTC1h 55m
2026-05-13 UKP152 EMA → EMA May 13, 19:40 UTCMay 13, 22:35 UTC2h 55m
2026-05-13 UKP152 EMA → EMA May 13, 12:55 UTCMay 13, 15:40 UTC2h 45m
2026-05-12 UKP152 - May 12, 19:05 UTCMay 12, 21:20 UTC2h 15m
2026-05-11 UKP152 - May 11, 20:10 UTCMay 11, 22:15 UTC2h 5m
2026-05-11 UKP152 EMA → NCL May 11, 16:45 UTCMay 11, 18:40 UTC1h 56m
2026-05-10 UKP152 EMA → EMA May 10, 20:40 UTCMay 10, 23:39 UTC3h 0m
2026-05-10 UKP152 EMA → EMA May 10, 17:05 UTCMay 10, 19:00 UTC1h 55m
2026-05-09 UKP152 EMA → EMA May 9, 17:20 UTCMay 9, 19:10 UTC1h 50m
2026-05-09 UKP152 - May 9, 14:00 UTCMay 9, 15:20 UTC1h 20m
2026-05-07 UKP152 EMA → EMA May 7, 16:55 UTCMay 7, 18:55 UTC2h 0m
2026-05-06 UKP152 NCL → EMA May 6, 20:05 UTCMay 6, 21:55 UTC1h 50m
2026-05-06 UKP152 EMA → NCL May 6, 16:30 UTCMay 6, 18:05 UTC1h 34m
2026-05-05 UKP152 EMA → EMA May 5, 20:45 UTCMay 5, 22:25 UTC1h 40m
2026-05-05 UKP152 EMA → EMA May 5, 14:20 UTCMay 5, 15:45 UTC1h 25m
2026-05-04 UKP152 - May 4, 17:55 UTCMay 4, 20:10 UTC2h 16m
2026-05-04 UKP152 EMA → EMA May 4, 12:40 UTCMay 4, 13:55 UTC1h 15m
2026-05-03 UKP152 EMA → EMA May 3, 12:50 UTCMay 3, 14:40 UTC1h 50m
2026-05-02 UKP152 EMA → EMA May 2, 15:30 UTCMay 2, 17:45 UTC2h 15m
2026-05-01 UKP152 CEG → EMA May 1, 19:45 UTCMay 1, 21:50 UTC2h 5m
2026-05-01 UKP152 EMA → CEG May 1, 14:10 UTCMay 1, 16:30 UTC2h 20m
2026-04-30 UKP152 CEG → EMA Apr 30, 14:30 UTCApr 30, 15:35 UTC1h 5m
2026-04-30 UKP152 EMA → CEG Apr 30, 11:35 UTCApr 30, 12:05 UTC30m
2026-04-24 UKP152 EMA → EMA Apr 24, 16:35 UTCApr 24, 19:20 UTC2h 45m

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

Mode-S 4077FC frequently asked

What is Mode-S code 4077FC?
4077FC is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-POLZ.
Where is Mode-S 4077FC registered?
Mode-S code 4077FC 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 4077FC broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4077FC, octal 20073774, decimal 4,225,020.
What flights does 4077FC operate?
Mode-S 4077FC has broadcast 1 distinct callsign, including UKP152.