Apparatus

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sensors Mode-S transponder

C81D80

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-OKN · BOEING 777-300ER

Hex
C81D80
Octal
62016600
Decimal
13,114,752
Country
NZ
Tail
ZK-OKN
Type
B77W
No current signal · last broadcast 5h ago
Flights observed
58
Distinct callsigns
20
Country
NZ
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S C81D80.

Country allocation

The ICAO 24-bit address C81D80 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 20 distinct

Callsign Airline Flights Last seen
ANZ284 Air New Zealand 8 2026-05-28
ANZ283 Air New Zealand 6 2026-05-29
ANZ176 Air New Zealand 5 2026-04-23
ANZ99 Air New Zealand 4 2026-04-25
ANZ90 Air New Zealand 4 2026-04-26
ANZ5 Air New Zealand 4 2026-05-28
ANZ945 Air New Zealand 3 2026-04-18
ANZ6 Air New Zealand 3 2026-05-27
ANZ175 Air New Zealand 3 2026-04-23
ANZ95 Air New Zealand 2 2026-04-27
ANZ946 Air New Zealand 2 2026-04-17
ANZ94 Air New Zealand 2 2026-04-28
ANZ146 Air New Zealand 2 2026-04-16
ANZ145 Air New Zealand 2 2026-04-16
ANZ128 Air New Zealand 2 2026-04-27
ANZ104 Air New Zealand 2 2026-04-29
ANZ903 Air New Zealand 1 2026-04-15
ANZ902 Air New Zealand 1 2026-04-15
ANZ127 Air New Zealand 1 2026-04-27
ANZ103 Air New Zealand 1 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ANZ283 SIN → AKL May 29, 17:30 UTCMay 29, 20:20 UTC2h 50m
2026-05-28 ANZ284 AKL → SIN May 28, 22:35 UTCMay 29, 05:10 UTC6h 35m
2026-05-28 ANZ5 LAX → AKL May 28, 05:35 UTCMay 28, 17:55 UTC12h 20m
2026-05-27 ANZ6 AKL → LAX May 27, 09:00 UTCMay 27, 20:15 UTC11h 15m
2026-04-29 ANZ104 SYD → AKL Apr 29, 04:49 UTCApr 29, 05:09 UTC20m
2026-04-29 ANZ104 SYD → AKL Apr 29, 02:30 UTCApr 29, 03:04 UTC35m
2026-04-28 ANZ103 AKL → SYD Apr 28, 21:40 UTCApr 29, 00:20 UTC2h 40m
2026-04-28 ANZ94 NRT → AKL Apr 28, 07:00 UTCApr 28, 16:40 UTC9h 40m
2026-04-27 ANZ95 AKL → NRT Apr 27, 12:10 UTCApr 27, 22:50 UTC10h 40m
2026-04-27 ANZ128 MEL → AKL Apr 27, 08:05 UTCApr 27, 08:25 UTC20m
2026-04-27 ANZ128 MEL → AKL Apr 27, 05:10 UTCApr 27, 05:40 UTC30m
2026-04-27 ANZ127 AKL → MEL Apr 27, 00:15 UTCApr 27, 03:30 UTC3h 15m
2026-04-26 ANZ90 NRT → AKL Apr 26, 12:15 UTCApr 26, 22:10 UTC9h 55m
2026-04-25 ANZ99 AKL → NRT Apr 25, 23:15 UTCApr 26, 09:55 UTC10h 40m
2026-04-25 ANZ283 SIN → AKL Apr 25, 17:50 UTCApr 25, 20:55 UTC3h 5m
2026-04-25 ANZ284 AKL → SIN Apr 25, 08:55 UTCApr 25, 09:05 UTC10m
2026-04-24 ANZ284 AKL → SIN Apr 24, 23:15 UTCApr 25, 05:10 UTC5h 55m
2026-04-24 ANZ283 SIN → AKL Apr 24, 17:30 UTCApr 24, 20:40 UTC3h 10m
2026-04-24 ANZ284 AKL → SIN Apr 24, 08:10 UTCApr 24, 08:20 UTC10m
2026-04-23 ANZ284 AKL → SIN Apr 23, 22:30 UTCApr 24, 01:20 UTC2h 50m
2026-04-23 ANZ176 PER → AKL Apr 23, 12:01 UTCApr 23, 18:00 UTC5h 59m
2026-04-23 ANZ175 AKL → PER Apr 23, 00:50 UTCApr 23, 07:25 UTC6h 35m
2026-04-22 ANZ90 NRT → AKL Apr 22, 11:25 UTCApr 22, 21:05 UTC9h 40m
2026-04-21 ANZ99 AKL → NRT Apr 21, 22:30 UTCApr 22, 09:15 UTC10h 45m
2026-04-21 ANZ283 SIN → AKL Apr 21, 17:35 UTCApr 21, 20:30 UTC2h 55m
2026-04-21 ANZ284 AKL → SIN Apr 21, 09:00 UTCApr 21, 09:10 UTC10m
2026-04-20 ANZ284 AKL → SIN Apr 20, 23:25 UTCApr 21, 02:20 UTC2h 55m
2026-04-20 ANZ283 SIN → AKL Apr 20, 20:05 UTCApr 20, 20:35 UTC30m
2026-04-19 ANZ284 AKL → SIN Apr 19, 23:05 UTCApr 20, 02:00 UTC2h 55m
2026-04-19 ANZ94 - Apr 19, 06:55 UTCApr 19, 16:35 UTC9h 40m
2026-04-18 ANZ95 AKL → NRT Apr 18, 12:30 UTCApr 18, 23:05 UTC10h 35m
2026-04-18 ANZ945 RAR → AKL Apr 18, 05:25 UTCApr 18, 05:40 UTC15m
2026-04-18 ANZ945 RAR → AKL Apr 18, 04:50 UTCApr 18, 05:20 UTC30m
2026-04-17 ANZ946 AKL → RAR Apr 17, 20:55 UTCApr 17, 21:20 UTC25m
2026-04-17 ANZ5 LAX → AKL Apr 17, 17:25 UTCApr 17, 17:40 UTC15m
2026-04-17 ANZ5 LAX → AKL Apr 17, 16:55 UTCApr 17, 17:15 UTC20m
2026-04-17 ANZ5 LAX → AKL Apr 17, 05:30 UTCApr 17, 05:55 UTC25m
2026-04-16 ANZ6 AKL → LAX Apr 16, 20:05 UTCApr 16, 20:45 UTC40m
2026-04-16 ANZ6 AKL → LAX Apr 16, 09:10 UTCApr 16, 09:24 UTC15m
2026-04-16 ANZ146 BNE → AKL Apr 16, 05:54 UTCApr 16, 06:25 UTC30m
2026-04-16 ANZ146 BNE → AKL Apr 16, 03:49 UTCApr 16, 04:29 UTC40m
2026-04-16 ANZ145 AKL → BNE Apr 16, 01:10 UTCApr 16, 02:09 UTC1h 0m
2026-04-15 ANZ145 AKL → BNE Apr 15, 23:10 UTCApr 15, 23:25 UTC15m
2026-04-15 ANZ903 PPT → AKL Apr 15, 20:05 UTCApr 15, 20:50 UTC45m
2026-04-15 ANZ902 AKL → PPT Apr 15, 09:10 UTCApr 15, 09:45 UTC35m
2026-04-15 ANZ945 RAR → AKL Apr 15, 06:05 UTCApr 15, 06:50 UTC45m
2026-04-14 ANZ946 AKL → RAR Apr 14, 22:00 UTCApr 14, 22:30 UTC30m
2026-04-14 ANZ176 PER → AKL Apr 14, 17:20 UTCApr 14, 17:40 UTC20m
2026-04-14 ANZ176 PER → AKL Apr 14, 14:50 UTCApr 14, 15:20 UTC30m
2026-04-14 ANZ176 PER → AKL Apr 14, 14:00 UTCApr 14, 14:45 UTC45m

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

Mode-S C81D80 frequently asked

What is Mode-S code C81D80?
C81D80 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-OKN.
Where is Mode-S C81D80 registered?
Mode-S code C81D80 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 C81D80 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81D80, octal 62016600, decimal 13,114,752.
What flights does C81D80 operate?
Mode-S C81D80 has broadcast 20 distinct callsigns, including ANZ284, ANZ283, ANZ176, ANZ99, ANZ90.