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sensors Mode-S transponder

C81D02

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-NSZ · CESSNA 152

Hex
C81D02
Octal
62016402
Decimal
13,114,626
Country
NZ
Tail
ZK-NSZ
Type
C152
No current signal · last broadcast 14h ago
Flights observed
261
Distinct callsigns
1
Country
NZ
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S C81D02.

Country allocation

The ICAO 24-bit address C81D02 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
ZKNSZ - 261 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ZKNSZ - Jul 13, 23:10 UTCJul 13, 23:45 UTC35m
2026-07-13 ZKNSZ DUD → DUD Jul 13, 20:55 UTCJul 13, 22:20 UTC1h 25m
2026-07-13 ZKNSZ - Jul 13, 03:25 UTCJul 13, 04:00 UTC35m
2026-07-13 ZKNSZ DUD → DUD Jul 13, 01:30 UTCJul 13, 02:45 UTC1h 15m
2026-07-12 ZKNSZ - Jul 12, 23:05 UTCJul 13, 00:10 UTC1h 5m
2026-07-12 ZKNSZ - Jul 12, 20:20 UTCJul 12, 21:15 UTC55m
2026-07-12 ZKNSZ - Jul 12, 03:25 UTCJul 12, 04:01 UTC35m
2026-07-12 ZKNSZ - Jul 12, 01:15 UTCJul 12, 02:15 UTC1h 0m
2026-07-11 ZKNSZ - Jul 11, 23:45 UTCJul 12, 00:30 UTC45m
2026-07-11 ZKNSZ DUD → DUD Jul 11, 22:25 UTCJul 11, 22:55 UTC30m
2026-07-11 ZKNSZ - Jul 11, 03:35 UTCJul 11, 03:55 UTC20m
2026-07-11 ZKNSZ - Jul 11, 00:45 UTCJul 11, 01:05 UTC20m
2026-07-10 ZKNSZ - Jul 10, 23:50 UTCJul 11, 00:05 UTC15m
2026-07-10 ZKNSZ - Jul 10, 21:10 UTCJul 10, 21:25 UTC15m
2026-07-10 ZKNSZ - Jul 10, 01:40 UTCJul 10, 02:35 UTC55m
2026-07-09 ZKNSZ - Jul 9, 22:45 UTCJul 9, 23:00 UTC15m
2026-07-09 ZKNSZ DUD → DUD Jul 9, 02:45 UTCJul 9, 04:20 UTC1h 35m
2026-07-09 ZKNSZ - Jul 9, 01:10 UTCJul 9, 01:55 UTC45m
2026-07-08 ZKNSZ - Jul 8, 23:40 UTCJul 9, 00:40 UTC1h 0m
2026-07-08 ZKNSZ - Jul 8, 22:20 UTCJul 8, 22:50 UTC30m
2026-07-08 ZKNSZ - Jul 8, 20:35 UTCJul 8, 21:30 UTC55m
2026-07-07 ZKNSZ - Jul 7, 04:25 UTCJul 7, 04:55 UTC30m
2026-07-07 ZKNSZ DUD → DUD Jul 7, 02:05 UTCJul 7, 02:35 UTC30m
2026-07-06 ZKNSZ DUD → DUD Jul 6, 03:50 UTCJul 6, 04:05 UTC15m
2026-07-06 ZKNSZ - Jul 6, 01:35 UTCJul 6, 02:30 UTC55m
2026-07-05 ZKNSZ - Jul 5, 23:00 UTCJul 5, 23:55 UTC55m
2026-07-02 ZKNSZ - Jul 2, 03:15 UTCJul 2, 04:50 UTC1h 35m
2026-07-02 ZKNSZ - Jul 2, 00:25 UTCJul 2, 00:45 UTC20m
2026-07-01 ZKNSZ - Jul 1, 22:45 UTCJul 1, 23:20 UTC35m
2026-06-30 ZKNSZ - Jun 30, 22:35 UTCJun 30, 22:45 UTC10m
2026-06-29 ZKNSZ - Jun 29, 01:05 UTCJun 29, 01:39 UTC35m
2026-06-28 ZKNSZ - Jun 28, 00:59 UTCJun 28, 01:59 UTC1h 0m
2026-06-26 ZKNSZ - Jun 26, 23:55 UTCJun 27, 00:14 UTC20m
2026-06-26 ZKNSZ - Jun 26, 22:29 UTCJun 26, 23:19 UTC50m
2026-06-26 ZKNSZ DUD → DUD Jun 26, 21:04 UTCJun 26, 21:35 UTC30m
2026-06-26 ZKNSZ - Jun 26, 04:10 UTCJun 26, 04:45 UTC35m
2026-06-26 ZKNSZ - Jun 26, 02:34 UTCJun 26, 03:10 UTC35m
2026-06-25 ZKNSZ - Jun 25, 23:59 UTCJun 26, 00:55 UTC55m
2026-06-25 ZKNSZ - Jun 25, 22:10 UTCJun 25, 23:05 UTC55m
2026-06-25 ZKNSZ - Jun 25, 20:25 UTCJun 25, 21:20 UTC55m
2026-06-25 ZKNSZ - Jun 25, 01:59 UTCJun 25, 02:14 UTC15m
2026-06-24 ZKNSZ DUD → DUD Jun 24, 04:15 UTCJun 24, 04:39 UTC25m
2026-06-24 ZKNSZ - Jun 24, 02:20 UTCJun 24, 03:04 UTC45m
2026-06-23 ZKNSZ - Jun 23, 22:15 UTCJun 23, 22:55 UTC40m
2026-06-23 ZKNSZ - Jun 23, 20:59 UTCJun 23, 21:34 UTC35m
2026-06-23 ZKNSZ - Jun 23, 03:15 UTCJun 23, 04:25 UTC1h 10m
2026-06-23 ZKNSZ - Jun 23, 01:25 UTCJun 23, 02:29 UTC1h 5m
2026-06-23 ZKNSZ - Jun 23, 00:00 UTCJun 23, 00:35 UTC35m
2026-06-22 ZKNSZ DUD → DUD Jun 22, 22:34 UTCJun 22, 23:10 UTC35m
2026-06-22 ZKNSZ DUD → DUD Jun 22, 20:55 UTCJun 22, 21:49 UTC55m

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

Mode-S C81D02 frequently asked

What is Mode-S code C81D02?
C81D02 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NSZ.
Where is Mode-S C81D02 registered?
Mode-S code C81D02 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 C81D02 broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81D02, octal 62016402, decimal 13,114,626.
What flights does C81D02 operate?
Mode-S C81D02 has broadcast 1 distinct callsign, including ZKNSZ.