Apparatus

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sensors Mode-S transponder

C81CB1

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-LJF · PIPER PA-28-140/150/160/180

Hex
C81CB1
Octal
62016261
Decimal
13,114,545
Country
NZ
Tail
ZK-LJF
Type
P28A
Broadcasting now · callsign ZKLJF · 4,700 ft
Flights observed
12
Distinct callsigns
1
Country
NZ
Last broadcast
14h ago

Current position

C81CB1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C81CB1 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
ZKLJF - 12 2026-04-14

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 ZKLJF - Apr 14, 09:35 UTCApr 14, 10:15 UTC40m
2026-04-14 ZKLJF - Apr 14, 07:30 UTCApr 14, 08:30 UTC1h 0m
2026-04-13 ZKLJF - Apr 13, 22:30 UTCApr 13, 23:30 UTC1h 0m
2026-04-13 ZKLJF CHC → CHC Apr 13, 20:25 UTCApr 13, 21:35 UTC1h 10m
2026-04-13 ZKLJF - Apr 13, 09:05 UTCApr 13, 10:30 UTC1h 25m
2026-04-13 ZKLJF - Apr 13, 07:55 UTCApr 13, 08:25 UTC30m
2026-04-13 ZKLJF - Apr 13, 07:30 UTCApr 13, 08:15 UTC45m
2026-04-13 ZKLJF - Apr 13, 04:20 UTCApr 13, 05:00 UTC40m
2026-04-13 ZKLJF - Apr 13, 03:55 UTCApr 13, 05:00 UTC1h 5m
2026-04-13 ZKLJF - Apr 13, 03:40 UTCApr 13, 04:15 UTC35m
2026-04-13 ZKLJF CHC → CHC Apr 13, 01:35 UTCApr 13, 02:40 UTC1h 5m
2026-04-13 ZKLJF - Apr 13, 00:25 UTCApr 13, 01:05 UTC40m

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

Mode-S C81CB1 frequently asked

What is Mode-S code C81CB1?
C81CB1 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-LJF.
Where is Mode-S C81CB1 registered?
Mode-S code C81CB1 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 C81CB1 broadcasting right now?
Yes. Mode-S C81CB1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81CB1, octal 62016261, decimal 13,114,545.
What flights does C81CB1 operate?
Mode-S C81CB1 has broadcast 1 distinct callsign, including ZKLJF.