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sensors Mode-S transponder

C81D7E

ICAO 24-bit transponder address · allocated to New Zealand

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

Hex
C81D7E
Octal
62016576
Decimal
13,114,750
Country
NZ
Tail
ZK-OKM
Type
B77W
No current signal · last broadcast 34m ago
Flights observed
146
Distinct callsigns
20
Country
NZ
Last broadcast
34m ago

Last known position

Most recent position reported by Mode-S C81D7E.

Country allocation

The ICAO 24-bit address C81D7E 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
ANZ283 Air New Zealand 17 2026-07-02
ANZ284 - 16 2026-07-02
ANZ281 Air New Zealand 13 2026-05-23
ANZ282 Air New Zealand 12 2026-05-22
ANZ24 - 8 2026-07-12
ANZ23 - 8 2026-07-13
ANZ6 - 7 2026-07-14
ANZ90 Air New Zealand 5 2026-05-17
ANZ5 Air New Zealand 5 2026-06-24
ANZ122 - 5 2026-07-14
ANZ121 - 5 2026-07-13
ANZ99 Air New Zealand 4 2026-05-16
ANZ953 - 4 2026-07-06
ANZ903 Air New Zealand 4 2026-05-01
ANZ104 - 4 2026-06-27
ANZ103 - 4 2026-06-26
ANZ291 Air New Zealand 3 2026-05-17
ANZ146 - 3 2026-07-05
ANZ145 - 3 2026-07-04
ANZ952 - 2 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ANZ6 - Jul 14, 08:30 UTCJul 14, 09:00 UTC30m
2026-07-14 ANZ122 MEL → AKL Jul 14, 02:45 UTCJul 14, 05:40 UTC2h 55m
2026-07-13 ANZ121 - Jul 13, 21:15 UTCJul 14, 00:55 UTC3h 40m
2026-07-13 ANZ23 YVR → AKL Jul 13, 04:15 UTCJul 13, 17:20 UTC13h 5m
2026-07-12 ANZ24 - Jul 12, 09:15 UTCJul 12, 21:30 UTC12h 15m
2026-07-12 ANZ293 - Jul 12, 06:20 UTCJul 12, 06:40 UTC20m
2026-07-11 ANZ292 - Jul 11, 10:15 UTCJul 12, 04:45 UTC18h 30m
2026-07-11 ANZ292 - Jul 11, 08:10 UTCJul 12, 04:45 UTC20h 35m
2026-07-10 ANZ945 - Jul 10, 20:55 UTCJul 11, 05:45 UTC8h 50m
2026-07-10 ANZ23 YVR → AKL Jul 10, 04:15 UTCJul 10, 17:20 UTC13h 5m
2026-07-09 ANZ24 - Jul 9, 08:45 UTCJul 9, 21:10 UTC12h 25m
2026-07-09 ANZ122 MEL → AKL Jul 9, 02:35 UTCJul 9, 05:45 UTC3h 10m
2026-07-08 ANZ121 - Jul 8, 21:25 UTCJul 9, 00:40 UTC3h 15m
2026-07-08 ANZ23 - Jul 8, 04:15 UTCJul 8, 17:05 UTC12h 50m
2026-07-07 ANZ24 - Jul 7, 08:40 UTCJul 7, 21:20 UTC12h 40m
2026-07-06 ANZ953 - Jul 6, 22:10 UTCJul 7, 06:05 UTC7h 55m
2026-07-06 ANZ23 - Jul 6, 04:20 UTCJul 6, 17:05 UTC12h 45m
2026-07-05 ANZ24 - Jul 5, 09:10 UTCJul 5, 21:45 UTC12h 35m
2026-07-05 ANZ146 BNE → AKL Jul 5, 03:25 UTCJul 5, 05:55 UTC2h 30m
2026-07-04 ANZ145 - Jul 4, 22:20 UTCJul 5, 01:35 UTC3h 15m
2026-07-04 ANZ23 YVR → AKL Jul 4, 04:15 UTCJul 4, 17:30 UTC13h 15m
2026-07-03 ANZ24 - Jul 3, 08:35 UTCJul 3, 20:55 UTC12h 20m
2026-07-02 ANZ953 - Jul 2, 22:40 UTCJul 3, 05:40 UTC7h 0m
2026-07-02 ANZ283 SIN → AKL Jul 2, 11:25 UTCJul 2, 20:05 UTC8h 40m
2026-07-02 ANZ284 - Jul 2, 08:40 UTCJul 2, 08:50 UTC10m
2026-07-01 ANZ284 - Jul 1, 22:35 UTCJul 2, 02:35 UTC4h 0m
2026-07-01 ANZ283 SIN → AKL Jul 1, 11:15 UTCJul 1, 19:50 UTC8h 35m
2026-07-01 ANZ284 - Jul 1, 08:50 UTCJul 1, 09:05 UTC15m
2026-06-30 ANZ284 - Jun 30, 22:45 UTCJul 1, 05:05 UTC6h 20m
2026-06-30 ANZ283 SIN → AKL Jun 30, 11:05 UTCJun 30, 20:00 UTC8h 55m
2026-06-30 ANZ284 - Jun 30, 08:30 UTCJun 30, 08:45 UTC15m
2026-06-29 ANZ284 - Jun 29, 22:24 UTCJun 30, 01:30 UTC3h 6m
2026-06-29 ANZ283 SIN → AKL Jun 29, 17:14 UTCJun 29, 19:49 UTC2h 35m
2026-06-28 ANZ284 - Jun 28, 22:15 UTCJun 29, 02:20 UTC4h 5m
2026-06-28 ANZ23 - Jun 28, 04:55 UTCJun 28, 17:34 UTC12h 40m
2026-06-27 ANZ24 - Jun 27, 08:35 UTCJun 27, 21:15 UTC12h 40m
2026-06-27 ANZ104 SYD → AKL Jun 27, 02:25 UTCJun 27, 04:59 UTC2h 35m
2026-06-26 ANZ103 - Jun 26, 21:39 UTCJun 27, 00:25 UTC2h 45m
2026-06-26 ANZ23 - Jun 26, 04:24 UTCJun 26, 17:19 UTC12h 55m
2026-06-25 ANZ24 - Jun 25, 09:10 UTCJun 25, 21:25 UTC12h 15m
2026-06-25 ANZ122 MEL → AKL Jun 25, 03:20 UTCJun 25, 06:35 UTC3h 15m
2026-06-24 ANZ121 - Jun 24, 21:50 UTCJun 25, 01:14 UTC3h 25m
2026-06-24 ANZ5 LAX → AKL Jun 24, 05:40 UTCJun 24, 17:50 UTC12h 10m
2026-06-23 ANZ6 - Jun 23, 08:50 UTCJun 23, 20:15 UTC11h 25m
2026-06-22 ANZ6022 BNE → AKL Jun 22, 21:59 UTCJun 23, 00:30 UTC2h 30m
2026-06-22 ANZ1945 - Jun 22, 06:00 UTCJun 22, 19:24 UTC13h 25m
2026-06-21 ANZ6 - Jun 21, 08:40 UTCJun 21, 20:00 UTC11h 20m
2026-06-20 ANZ952 - Jun 20, 22:20 UTCJun 21, 05:04 UTC6h 45m
2026-06-20 ANZ5 LAX → AKL Jun 20, 05:34 UTCJun 20, 18:04 UTC12h 30m
2026-06-19 ANZ6 - Jun 19, 08:40 UTCJun 19, 20:19 UTC11h 40m

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

Mode-S C81D7E frequently asked

What is Mode-S code C81D7E?
C81D7E is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-OKM.
Where is Mode-S C81D7E registered?
Mode-S code C81D7E 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 C81D7E broadcasting right now?
No active broadcast right now. Last signal was 34m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81D7E, octal 62016576, decimal 13,114,750.
What flights does C81D7E operate?
Mode-S C81D7E has broadcast 20 distinct callsigns, including ANZ283, ANZ284, ANZ281, ANZ282, ANZ24.