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 2d ago
Flights observed
85
Distinct callsigns
20
Country
NZ
Last broadcast
2d 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 ANZ104 SYD → AKL May 27, 02:29 UTCMay 27, 04:49 UTC2h 20m
2026-05-26 ANZ103 AKL → SYD May 26, 21:20 UTCMay 27, 00:49 UTC3h 30m
2026-05-25 ANZ953 NAN → AKL May 25, 04:25 UTCMay 25, 05:00 UTC35m
2026-05-24 ANZ146 BNE → AKL May 24, 03:50 UTCMay 24, 06:35 UTC2h 45m
2026-05-23 ANZ145 AKL → BNE May 23, 22:25 UTCMay 24, 01:10 UTC2h 45m
2026-05-23 ANZ281 SIN → AKL May 23, 09:50 UTCMay 23, 10:15 UTC25m
2026-05-23 ANZ281 SIN → AKL May 23, 07:15 UTCMay 23, 08:05 UTC50m
2026-05-22 ANZ282 AKL → SIN May 22, 22:30 UTCMay 22, 22:40 UTC10m
2026-05-22 ANZ282 AKL → SIN May 22, 12:30 UTCMay 22, 15:25 UTC2h 55m
2026-05-22 ANZ281 SIN → AKL May 22, 07:15 UTCMay 22, 10:10 UTC2h 54m
2026-05-21 ANZ282 AKL → SIN May 21, 12:25 UTCMay 21, 15:30 UTC3h 5m
2026-05-21 ANZ281 SIN → AKL May 21, 07:00 UTCMay 21, 09:50 UTC2h 50m
2026-05-21 ANZ281 SIN → AKL May 21, 00:50 UTCMay 21, 01:00 UTC10m
2026-05-20 ANZ282 AKL → SIN May 20, 12:15 UTCMay 20, 15:30 UTC3h 15m
2026-05-20 ANZ281 SIN → AKL May 20, 07:00 UTCMay 20, 09:45 UTC2h 45m
2026-05-19 ANZ282 AKL → SIN May 19, 12:15 UTCMay 19, 22:40 UTC10h 25m
2026-05-19 ANZ122 MEL → AKL May 19, 03:00 UTCMay 19, 06:10 UTC3h 10m
2026-05-18 ANZ121 AKL → MEL May 18, 21:45 UTCMay 19, 01:15 UTC3h 30m
2026-05-17 ANZ291 DPS → AKL May 17, 23:45 UTCMay 18, 17:25 UTC17h 40m
2026-05-17 ANZ90 NRT → AKL May 17, 11:25 UTCMay 17, 21:35 UTC10h 10m
2026-05-16 ANZ99 AKL → NRT May 16, 22:35 UTCMay 17, 08:50 UTC10h 15m
2026-05-16 ANZ291 DPS → AKL May 16, 00:30 UTCMay 16, 19:25 UTC18h 56m
2026-05-15 ANZ90 NRT → AKL May 15, 12:00 UTCMay 15, 22:15 UTC10h 14m
2026-05-14 ANZ99 AKL → NRT May 14, 23:15 UTCMay 15, 09:50 UTC10h 35m
2026-05-14 ANZ283 SIN → AKL May 14, 17:50 UTCMay 14, 20:45 UTC2h 55m
2026-05-13 ANZ284 AKL → SIN May 13, 23:20 UTCMay 14, 02:15 UTC2h 55m
2026-05-13 ANZ284 AKL → SIN May 13, 01:40 UTCMay 13, 21:00 UTC19h 20m
2026-05-12 ANZ284 AKL → SIN May 12, 23:45 UTCMay 13, 21:00 UTC21h 15m
2026-05-12 ANZ283 SIN → AKL May 12, 17:20 UTCMay 12, 20:30 UTC3h 10m
2026-05-11 ANZ283 SIN → AKL May 11, 01:34 UTCMay 11, 20:35 UTC19h 1m
2026-05-11 ANZ283 SIN → AKL May 11, 00:40 UTCMay 11, 20:35 UTC19h 56m
2026-05-10 ANZ283 SIN → AKL May 10, 22:35 UTCMay 11, 20:35 UTC22h 1m
2026-05-10 ANZ283 SIN → AKL May 10, 01:34 UTCMay 10, 19:54 UTC18h 20m
2026-05-10 ANZ283 SIN → AKL May 10, 00:55 UTCMay 10, 19:54 UTC19h 0m
2026-05-09 ANZ283 SIN → AKL May 9, 22:49 UTCMay 10, 19:54 UTC21h 5m
2026-05-08 ANZ290 AKL → DPS May 8, 23:50 UTCMay 9, 17:05 UTC17h 15m
2026-05-08 ANZ90 NRT → AKL May 8, 11:19 UTCMay 8, 21:10 UTC9h 50m
2026-05-07 ANZ99 AKL → NRT May 7, 22:30 UTCMay 8, 08:59 UTC10h 30m
2026-05-06 ANZ281 SIN → AKL May 6, 15:35 UTCMay 7, 10:20 UTC18h 45m
2026-05-06 ANZ282 AKL → SIN May 6, 14:55 UTCMay 7, 10:20 UTC19h 25m
2026-05-06 ANZ282 AKL → SIN May 6, 12:35 UTCMay 7, 10:20 UTC21h 45m
2026-05-06 ANZ281 SIN → AKL May 6, 07:05 UTCMay 6, 09:55 UTC2h 50m
2026-05-05 ANZ281 SIN → AKL May 5, 14:20 UTCMay 6, 09:55 UTC19h 35m
2026-05-05 ANZ282 AKL → SIN May 5, 12:05 UTCMay 6, 09:55 UTC21h 50m
2026-05-04 ANZ281 SIN → AKL May 4, 15:35 UTCMay 5, 09:45 UTC18h 11m
2026-05-04 ANZ281 SIN → AKL May 4, 15:05 UTCMay 5, 09:45 UTC18h 41m
2026-05-04 ANZ282 AKL → SIN May 4, 12:15 UTCMay 5, 09:45 UTC21h 31m
2026-05-04 ANZ281 SIN → AKL May 4, 01:05 UTCMay 4, 10:00 UTC8h 55m
2026-05-03 ANZ282 AKL → SIN May 3, 22:15 UTCMay 3, 22:30 UTC15m
2026-05-03 ANZ282 AKL → SIN May 3, 12:15 UTCMay 3, 14:55 UTC2h 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 2d 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 ANZ281, ANZ283, ANZ282, ANZ284, ANZ90.