Apparatus

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sensors Mode-S transponder

478055

ICAO 24-bit transponder address · allocated to Norway

Currently assigned to LN-OQO · SIKORSKY S-92 Helibus

Hex
478055
Octal
21700125
Decimal
4,685,909
Country
NO
Tail
LN-OQO
Type
S92
No current signal · last broadcast 7h ago
Flights observed
193
Distinct callsigns
17
Country
NO
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 478055.

Country allocation

The ICAO 24-bit address 478055 falls within the block assigned to Norway (NO) by ICAO Annex 10, Volume III. Every aircraft registered in Norway 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 17 distinct

Callsign Airline Flights Last seen
HKS371 - 55 2026-07-22
HKS322 - 54 2026-07-21
HKS667 - 35 2026-06-25
HKS372 - 20 2026-07-10
HKS328 - 6 2026-07-11
HKS668 - 4 2026-06-23
HKS55T - 4 2026-04-26
HKS40T - 3 2026-05-28
HKS373 - 2 2026-07-01
HKS354 - 2 2026-05-28
HKS170 - 2 2026-05-21
HKS56T - 1 2026-04-26
HKS502 - 1 2026-05-21
HKS41T - 1 2026-05-10
HKS380 - 1 2026-05-01
HKS35F - 1 2026-07-05
HKS350 - 1 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 HKS371 - Jul 22, 13:20 UTCJul 22, 13:45 UTC25m
2026-07-22 HKS371 - Jul 22, 11:50 UTCJul 22, 12:20 UTC30m
2026-07-21 HKS371 - Jul 21, 13:20 UTCJul 21, 13:50 UTC30m
2026-07-21 HKS371 - Jul 21, 11:50 UTCJul 21, 12:20 UTC30m
2026-07-21 HKS322 - Jul 21, 10:20 UTCJul 21, 10:50 UTC30m
2026-07-21 HKS322 - Jul 21, 08:35 UTCJul 21, 09:10 UTC35m
2026-07-20 HKS371 - Jul 20, 13:05 UTCJul 20, 13:40 UTC35m
2026-07-20 HKS371 - Jul 20, 11:45 UTCJul 20, 12:15 UTC30m
2026-07-20 HKS322 - Jul 20, 09:50 UTCJul 20, 10:25 UTC35m
2026-07-20 HKS322 - Jul 20, 08:30 UTCJul 20, 09:00 UTC30m
2026-07-17 HKS322 - Jul 17, 10:05 UTCJul 17, 10:40 UTC35m
2026-07-17 HKS322 - Jul 17, 08:40 UTCJul 17, 09:10 UTC30m
2026-07-16 HKS371 - Jul 16, 09:55 UTCJul 16, 10:29 UTC35m
2026-07-16 HKS371 - Jul 16, 08:35 UTCJul 16, 09:05 UTC30m
2026-07-15 HKS371 - Jul 15, 13:20 UTCJul 15, 13:55 UTC35m
2026-07-15 HKS371 - Jul 15, 11:55 UTCJul 15, 12:20 UTC25m
2026-07-15 HKS322 - Jul 15, 10:15 UTCJul 15, 10:45 UTC30m
2026-07-15 HKS322 - Jul 15, 08:40 UTCJul 15, 09:05 UTC25m
2026-07-14 HKS371 - Jul 14, 13:10 UTCJul 14, 13:40 UTC30m
2026-07-14 HKS371 - Jul 14, 11:40 UTCJul 14, 12:20 UTC40m
2026-07-14 HKS322 - Jul 14, 10:15 UTCJul 14, 10:45 UTC30m
2026-07-14 HKS322 - Jul 14, 08:40 UTCJul 14, 09:05 UTC25m
2026-07-13 HKS371 - Jul 13, 13:20 UTCJul 13, 13:50 UTC30m
2026-07-13 HKS371 - Jul 13, 11:55 UTCJul 13, 12:20 UTC25m
2026-07-13 HKS322 - Jul 13, 10:05 UTCJul 13, 10:35 UTC30m
2026-07-13 HKS322 - Jul 13, 08:30 UTCJul 13, 09:00 UTC30m
2026-07-11 HKS328 - Jul 11, 10:30 UTCJul 11, 11:05 UTC35m
2026-07-11 HKS328 - Jul 11, 09:05 UTCJul 11, 09:45 UTC40m
2026-07-10 HKS372 - Jul 10, 16:20 UTCJul 10, 17:00 UTC40m
2026-07-10 HKS372 - Jul 10, 14:50 UTCJul 10, 15:20 UTC30m
2026-07-09 HKS371 - Jul 9, 10:10 UTCJul 9, 10:40 UTC30m
2026-07-09 HKS371 - Jul 9, 08:40 UTCJul 9, 09:05 UTC25m
2026-07-08 HKS371 - Jul 8, 13:15 UTCJul 8, 13:50 UTC35m
2026-07-08 HKS371 - Jul 8, 11:55 UTCJul 8, 12:25 UTC30m
2026-07-08 HKS322 - Jul 8, 10:25 UTCJul 8, 11:00 UTC35m
2026-07-08 HKS322 - Jul 8, 08:50 UTCJul 8, 09:25 UTC35m
2026-07-07 HKS371 - Jul 7, 13:20 UTCJul 7, 13:50 UTC30m
2026-07-07 HKS371 - Jul 7, 11:55 UTCJul 7, 12:25 UTC30m
2026-07-07 HKS322 - Jul 7, 10:20 UTCJul 7, 10:55 UTC35m
2026-07-07 HKS322 - Jul 7, 08:35 UTCJul 7, 09:10 UTC35m
2026-07-06 HKS371 - Jul 6, 15:35 UTCJul 6, 17:00 UTC1h 25m
2026-07-06 HKS371 - Jul 6, 13:25 UTCJul 6, 13:50 UTC25m
2026-07-06 HKS371 - Jul 6, 11:45 UTCJul 6, 12:15 UTC30m
2026-07-06 HKS322 - Jul 6, 10:05 UTCJul 6, 10:35 UTC30m
2026-07-06 HKS322 - Jul 6, 08:35 UTCJul 6, 09:00 UTC25m
2026-07-05 HKS35F - Jul 5, 16:45 UTCJul 5, 18:05 UTC1h 20m
2026-07-03 HKS322 - Jul 3, 10:10 UTCJul 3, 10:40 UTC30m
2026-07-03 HKS322 - Jul 3, 08:45 UTCJul 3, 09:15 UTC30m
2026-07-03 HKS372 - Jul 3, 06:35 UTCJul 3, 07:05 UTC30m
2026-07-03 HKS372 - Jul 3, 05:15 UTCJul 3, 05:45 UTC30m

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 LN-OQO page for operator, model, and routing details .

Mode-S 478055 frequently asked

What is Mode-S code 478055?
478055 is an ICAO 24-bit transponder address. Allocated to Norway. Assigned to LN-OQO.
Where is Mode-S 478055 registered?
Mode-S code 478055 is allocated to Norway (NO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 478055 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 478055, octal 21700125, decimal 4,685,909.
What flights does 478055 operate?
Mode-S 478055 has broadcast 17 distinct callsigns, including HKS371, HKS322, HKS667, HKS372, HKS328.