Apparatus

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sensors Mode-S transponder

C83311

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-IRB · AGUSTA AW-169 · operated by Northern Rescue Helicopter Ltd

Hex
C83311
Octal
62031421
Decimal
13,120,273
Country
NZ
Tail
ZK-IRB
Type
A169
No current signal · last broadcast 15h ago
Flights observed
11
Distinct callsigns
1
Country
NZ
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S C83311.

Country allocation

The ICAO 24-bit address C83311 falls within the block assigned to New Zealand (NZ) by ICAO Annex 10, Volume III. Every aircraft registered in New Zealand 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
NOR4 - 11 2026-04-14

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 NOR4 - Apr 14, 09:20 UTCApr 14, 09:30 UTC10m
2026-04-14 NOR4 - Apr 14, 08:30 UTCApr 14, 08:45 UTC15m
2026-04-14 NOR4 - Apr 14, 06:10 UTCApr 14, 06:35 UTC25m
2026-04-13 NOR4 - Apr 13, 17:30 UTCApr 13, 18:35 UTC1h 5m
2026-04-13 NOR4 - Apr 13, 13:30 UTCApr 13, 14:20 UTC50m
2026-04-13 NOR4 - Apr 13, 10:25 UTCApr 13, 11:35 UTC1h 10m
2026-04-13 NOR4 - Apr 13, 06:40 UTCApr 13, 07:10 UTC30m
2026-04-13 NOR4 - Apr 13, 05:45 UTCApr 13, 05:55 UTC10m
2026-04-13 NOR4 - Apr 13, 00:20 UTCApr 13, 00:55 UTC35m
2026-04-13 NOR4 - Apr 13, 00:10 UTCApr 13, 00:55 UTC45m
2026-04-12 NOR4 - Apr 12, 19:50 UTCApr 12, 20:05 UTC15m

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 ZK-IRB page for operator, model, and routing details .

Mode-S C83311 frequently asked

What is Mode-S code C83311?
C83311 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-IRB.
Where is Mode-S C83311 registered?
Mode-S code C83311 is allocated to New Zealand (NZ). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C83311 broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C83311, octal 62031421, decimal 13,120,273.
What flights does C83311 operate?
Mode-S C83311 has broadcast 1 distinct callsign, including NOR4.