Apparatus

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sensors Mode-S transponder

C81D8E

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-OAB · AIRBUS A-320

Hex
C81D8E
Octal
62016616
Decimal
13,114,766
Country
NZ
Tail
ZK-OAB
Type
A320
No current signal · last broadcast 3h ago
Flights observed
584
Distinct callsigns
20
Country
NZ
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S C81D8E.

Country allocation

The ICAO 24-bit address C81D8E 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
ANZ570 - 11 2026-07-17
ANZ534 - 11 2026-07-21
ANZ543 Air New Zealand 10 2026-07-21
ANZ406 - 10 2026-07-07
ANZ461 - 9 2026-07-17
ANZ410 - 9 2026-07-13
ANZ402 - 9 2026-07-16
ANZ555 Air New Zealand 8 2026-07-22
ANZ523 - 8 2026-07-16
ANZ515 Air New Zealand 8 2026-07-21
ANZ457 - 8 2026-07-09
ANZ456 - 8 2026-07-15
ANZ325 - 8 2026-07-17
ANZ324 - 8 2026-07-17
ANZ699 Air New Zealand 7 2026-06-04
ANZ698 Air New Zealand 7 2026-06-05
ANZ690 - 7 2026-07-09
ANZ689 - 7 2026-07-09
ANZ659 - 7 2026-07-17
ANZ644 - 7 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 ANZ445 AKL → WLG Jul 25, 05:15 UTCJul 25, 05:30 UTC15m
2026-07-25 ANZ436 WLG → AKL Jul 25, 03:05 UTCJul 25, 03:55 UTC50m
2026-07-25 ANZ425 AKL → WLG Jul 25, 00:30 UTCJul 25, 01:15 UTC45m
2026-07-24 ANZ676 DUD → AKL Jul 24, 21:30 UTCJul 24, 23:00 UTC1h 30m
2026-07-24 ANZ673 AKL → DUD Jul 24, 19:00 UTCJul 24, 20:35 UTC1h 35m
2026-07-24 ANZ458 WLG → AKL Jul 24, 10:15 UTCJul 24, 11:00 UTC45m
2026-07-24 ANZ455 WLG → CHC Jul 24, 08:25 UTCJul 24, 09:15 UTC50m
2026-07-24 ANZ578 CHC → AKL Jul 24, 06:10 UTCJul 24, 07:20 UTC1h 10m
2026-07-24 ANZ551 AKL → CHC Jul 24, 04:05 UTCJul 24, 05:05 UTC1h 0m
2026-07-24 ANZ428 WLG → AKL Jul 24, 01:45 UTCJul 24, 02:30 UTC45m
2026-07-23 ANZ686 DUD → WLG Jul 23, 23:10 UTCJul 24, 00:30 UTC1h 20m
2026-07-23 ANZ681 WLG → DUD Jul 23, 21:15 UTCJul 23, 22:15 UTC1h 0m
2026-07-23 ANZ332 CHC → WLG Jul 23, 19:20 UTCJul 23, 19:55 UTC35m
2026-07-23 ANZ569 AKL → CHC Jul 23, 08:45 UTCJul 23, 09:50 UTC1h 5m
2026-07-23 ANZ626 ZQN → AKL Jul 23, 06:00 UTCJul 23, 07:35 UTC1h 35m
2026-07-23 ANZ623 AKL → ZQN Jul 23, 03:20 UTCJul 23, 04:35 UTC1h 15m
2026-07-23 ANZ428 WLG → AKL Jul 23, 00:55 UTCJul 23, 01:45 UTC50m
2026-07-22 ANZ686 DUD → WLG Jul 22, 22:55 UTCJul 22, 23:50 UTC55m
2026-07-22 ANZ681 WLG → DUD Jul 22, 21:05 UTCJul 22, 22:05 UTC1h 0m
2026-07-22 ANZ332 CHC → WLG Jul 22, 19:05 UTCJul 22, 19:35 UTC30m
2026-07-22 ANZ555 AKL → CHC Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 ANZ550 CHC → AKL Jul 22, 02:40 UTCJul 22, 03:40 UTC1h 0m
2026-07-22 ANZ539 AKL → CHC Jul 22, 00:35 UTCJul 22, 01:45 UTC1h 10m
2026-07-21 ANZ534 - Jul 21, 20:25 UTCJul 21, 21:30 UTC1h 5m
2026-07-21 ANZ515 AKL → CHC Jul 21, 18:25 UTCJul 21, 19:35 UTC1h 10m
2026-07-21 ANZ558 CHC → AKL Jul 21, 04:35 UTCJul 21, 05:35 UTC1h 0m
2026-07-21 ANZ543 AKL → CHC Jul 21, 02:05 UTCJul 21, 03:15 UTC1h 10m
2026-07-20 ANZ538 CHC → AKL Jul 20, 23:45 UTCJul 21, 00:40 UTC55m
2026-07-20 ANZ527 - Jul 20, 21:30 UTCJul 20, 22:40 UTC1h 10m
2026-07-20 ANZ476 WLG → AKL Jul 20, 19:30 UTCJul 20, 20:10 UTC40m
2026-07-20 ANZ445 AKL → WLG Jul 20, 05:15 UTCJul 20, 06:00 UTC45m
2026-07-20 ANZ436 WLG → AKL Jul 20, 03:10 UTCJul 20, 03:50 UTC40m
2026-07-20 ANZ425 AKL → WLG Jul 20, 01:15 UTCJul 20, 02:00 UTC45m
2026-07-19 ANZ420 WLG → AKL Jul 19, 23:05 UTCJul 20, 00:05 UTC1h 0m
2026-07-19 ANZ584 CHC → AKL Jul 19, 19:15 UTCJul 19, 21:30 UTC2h 15m
2026-07-19 ANZ569 AKL → CHC Jul 19, 08:25 UTCJul 19, 09:30 UTC1h 5m
2026-07-19 ANZ578 CHC → AKL Jul 19, 05:10 UTCJul 19, 06:10 UTC1h 0m
2026-07-19 ANZ551 AKL → CHC Jul 19, 03:05 UTCJul 19, 04:10 UTC1h 5m
2026-07-19 ANZ616 - Jul 19, 00:20 UTCJul 19, 01:40 UTC1h 20m
2026-07-18 ANZ635 AKL → ZQN Jul 18, 21:50 UTCJul 18, 22:55 UTC1h 5m
2026-07-18 ANZ586 CHC → AKL Jul 18, 19:30 UTCJul 18, 20:30 UTC1h 0m
2026-07-18 ANZ567 - Jul 18, 07:10 UTCJul 18, 08:20 UTC1h 10m
2026-07-18 ANZ560 CHC → AKL Jul 18, 04:45 UTCJul 18, 05:40 UTC55m
2026-07-18 ANZ323 HLZ → CHC Jul 18, 02:45 UTCJul 18, 03:45 UTC1h 1m
2026-07-18 ANZ322 CHC → HLZ Jul 18, 00:39 UTCJul 18, 01:39 UTC1h 0m
2026-07-17 ANZ644 - Jul 17, 22:35 UTCJul 17, 23:05 UTC30m
2026-07-17 ANZ659 - Jul 17, 20:44 UTCJul 17, 21:10 UTC25m
2026-07-17 ANZ327 WLG → CHC Jul 17, 19:09 UTCJul 17, 19:45 UTC35m
2026-07-17 ANZ461 - Jul 17, 09:35 UTCJul 17, 10:20 UTC45m
2026-07-17 ANZ570 CHC → AKL Jul 17, 07:35 UTCJul 17, 08:35 UTC1h 0m

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

Mode-S C81D8E frequently asked

What is Mode-S code C81D8E?
C81D8E is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-OAB.
Where is Mode-S C81D8E registered?
Mode-S code C81D8E 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 C81D8E broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81D8E, octal 62016616, decimal 13,114,766.
What flights does C81D8E operate?
Mode-S C81D8E has broadcast 20 distinct callsigns, including ANZ570, ANZ534, ANZ543, ANZ406, ANZ461.