Apparatus

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sensors Mode-S transponder

C821EE

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-OXH · AIRBUS A-320

Hex
C821EE
Octal
62020756
Decimal
13,115,886
Country
NZ
Tail
ZK-OXH
Type
A320
No current signal · last broadcast 7d ago
Flights observed
239
Distinct callsigns
20
Country
NZ
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S C821EE.

Country allocation

The ICAO 24-bit address C821EE 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
ANZ584 Air New Zealand 10 2026-05-12
ANZ616 Air New Zealand 8 2026-05-18
ANZ635 Air New Zealand 7 2026-05-17
ANZ578 Air New Zealand 7 2026-05-11
ANZ551 Air New Zealand 7 2026-05-11
ANZ638 Air New Zealand 6 2026-05-08
ANZ550 Air New Zealand 6 2026-05-23
ANZ332 Air New Zealand 6 2026-05-10
ANZ686 Air New Zealand 5 2026-05-10
ANZ681 Air New Zealand 5 2026-05-10
ANZ627 Air New Zealand 5 2026-05-08
ANZ573 Air New Zealand 5 2026-05-19
ANZ538 Air New Zealand 5 2026-05-12
ANZ527 Air New Zealand 5 2026-05-12
ANZ468 Air New Zealand 5 2026-05-18
ANZ428 Air New Zealand 5 2026-05-11
ANZ410 Air New Zealand 5 2026-05-17
ANZ559 Air New Zealand 4 2026-05-23
ANZ481 Air New Zealand 4 2026-05-18
ANZ417 Air New Zealand 4 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-23 ANZ559 AKL → CHC May 23, 04:50 UTCMay 23, 06:00 UTC1h 10m
2026-05-23 ANZ550 CHC → AKL May 23, 02:15 UTCMay 23, 03:20 UTC1h 4m
2026-05-22 ANZ644 ZQN → AKL May 22, 22:35 UTCMay 22, 23:05 UTC30m
2026-05-22 ANZ659 CHC → ZQN May 22, 20:55 UTCMay 22, 21:35 UTC40m
2026-05-22 ANZ327 WLG → CHC May 22, 19:10 UTCMay 22, 19:45 UTC35m
2026-05-22 ANZ461 AKL → WLG May 22, 09:20 UTCMay 22, 10:05 UTC45m
2026-05-22 ANZ450 WLG → AKL May 22, 06:35 UTCMay 22, 07:30 UTC55m
2026-05-22 ANZ690 DUD → WLG May 22, 04:40 UTCMay 22, 05:35 UTC55m
2026-05-22 ANZ689 WLG → DUD May 22, 02:50 UTCMay 22, 03:50 UTC1h 0m
2026-05-22 ANZ425 AKL → WLG May 22, 00:35 UTCMay 22, 01:25 UTC50m
2026-05-21 ANZ676 DUD → AKL May 21, 21:45 UTCMay 21, 23:15 UTC1h 30m
2026-05-21 ANZ673 AKL → DUD May 21, 19:10 UTCMay 21, 20:40 UTC1h 30m
2026-05-21 ANZ628 ZQN → AKL May 21, 08:40 UTCMay 21, 10:00 UTC1h 20m
2026-05-21 ANZ625 AKL → ZQN May 21, 05:55 UTCMay 21, 07:05 UTC1h 10m
2026-05-21 ANZ550 CHC → AKL May 21, 02:15 UTCMay 21, 03:20 UTC1h 5m
2026-05-21 ANZ539 AKL → CHC May 21, 00:10 UTCMay 21, 01:15 UTC1h 5m
2026-05-20 ANZ412 WLG → AKL May 20, 20:55 UTCMay 20, 21:40 UTC45m
2026-05-20 ANZ405 AKL → WLG May 20, 19:10 UTCMay 20, 20:00 UTC50m
2026-05-20 ANZ550 CHC → AKL May 20, 02:10 UTCMay 20, 03:15 UTC1h 5m
2026-05-19 ANZ573 AKL → CHC May 19, 08:45 UTCMay 19, 10:00 UTC1h 15m
2026-05-19 ANZ626 ZQN → AKL May 19, 05:30 UTCMay 19, 06:45 UTC1h 15m
2026-05-19 ANZ623 AKL → ZQN May 19, 02:50 UTCMay 19, 04:20 UTC1h 30m
2026-05-19 ANZ542 CHC → AKL May 19, 00:10 UTCMay 19, 01:10 UTC1h 0m
2026-05-18 ANZ644 ZQN → AKL May 18, 22:35 UTCMay 18, 23:05 UTC30m
2026-05-18 ANZ659 CHC → ZQN May 18, 20:45 UTCMay 18, 21:25 UTC40m
2026-05-18 ANZ327 WLG → CHC May 18, 19:05 UTCMay 18, 19:45 UTC40m
2026-05-18 ANZ461 AKL → WLG May 18, 09:10 UTCMay 18, 10:00 UTC50m
2026-05-18 ANZ468 WLG → AKL May 18, 05:10 UTCMay 18, 06:01 UTC50m
2026-05-18 ANZ481 AKL → WLG May 18, 03:25 UTCMay 18, 04:11 UTC45m
2026-05-18 ANZ616 ZQN → AKL May 18, 00:30 UTCMay 18, 01:50 UTC1h 20m
2026-05-17 ANZ635 AKL → ZQN May 17, 21:35 UTCMay 17, 23:10 UTC1h 35m
2026-05-17 ANZ410 WLG → AKL May 17, 19:50 UTCMay 17, 20:35 UTC45m
2026-05-17 ANZ401 AKL → WLG May 17, 18:05 UTCMay 17, 18:55 UTC50m
2026-05-17 ANZ456 WLG → AKL May 17, 08:05 UTCMay 17, 08:55 UTC50m
2026-05-17 ANZ449 AKL → WLG May 17, 06:20 UTCMay 17, 07:10 UTC50m
2026-05-17 ANZ440 WLG → AKL May 17, 04:05 UTCMay 17, 04:50 UTC45m
2026-05-17 ANZ433 AKL → WLG May 17, 02:20 UTCMay 17, 03:10 UTC50m
2026-05-17 ANZ542 CHC → AKL May 17, 00:15 UTCMay 17, 01:15 UTC1h 0m
2026-05-16 ANZ531 AKL → CHC May 16, 22:10 UTCMay 16, 23:20 UTC1h 10m
2026-05-16 ANZ586 CHC → AKL May 16, 19:50 UTCMay 16, 20:55 UTC1h 5m
2026-05-16 ANZ573 AKL → CHC May 16, 08:51 UTCMay 16, 09:56 UTC1h 5m
2026-05-16 ANZ626 ZQN → AKL May 16, 05:30 UTCMay 16, 06:55 UTC1h 26m
2026-05-16 ANZ623 AKL → ZQN May 16, 02:55 UTCMay 16, 04:05 UTC1h 10m
2026-05-16 ANZ616 ZQN → AKL May 16, 00:20 UTCMay 16, 01:45 UTC1h 25m
2026-05-15 ANZ635 AKL → ZQN May 15, 21:35 UTCMay 15, 23:05 UTC1h 30m
2026-05-15 ANZ410 WLG → AKL May 15, 19:55 UTCMay 15, 20:40 UTC45m
2026-05-15 ANZ455 WLG → CHC May 15, 07:50 UTCMay 15, 08:35 UTC45m
2026-05-15 ANZ448 WLG → AKL May 15, 06:05 UTCMay 15, 06:45 UTC40m
2026-05-15 ANZ441 AKL → WLG May 15, 04:10 UTCMay 15, 05:05 UTC55m
2026-05-15 ANZ698 IVC → AKL May 15, 00:40 UTCMay 15, 02:15 UTC1h 35m

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

Mode-S C821EE frequently asked

What is Mode-S code C821EE?
C821EE is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-OXH.
Where is Mode-S C821EE registered?
Mode-S code C821EE 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 C821EE broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C821EE, octal 62020756, decimal 13,115,886.
What flights does C821EE operate?
Mode-S C821EE has broadcast 20 distinct callsigns, including ANZ584, ANZ616, ANZ635, ANZ578, ANZ551.