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sensors Mode-S transponder

C81D9D

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-OJQ · AIRBUS A-320

Hex
C81D9D
Octal
62016635
Decimal
13,114,781
Country
NZ
Tail
ZK-OJQ
Type
A320
Broadcasting now · callsign ANZ466 · 525 ft
Flights observed
601
Distinct callsigns
20
Country
NZ
Last broadcast
Jul 26, 20:15 UTC

Current position

C81D9D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C81D9D 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
ANZ573 - 15 2026-07-14
ANZ676 - 12 2026-07-21
ANZ673 Air New Zealand 12 2026-07-21
ANZ558 Air New Zealand 12 2026-07-25
ANZ466 - 12 2026-07-19
ANZ584 Air New Zealand 11 2026-07-26
ANZ547 Air New Zealand 11 2026-07-23
ANZ538 Air New Zealand 11 2026-07-24
ANZ613 - 10 2026-07-08
ANZ425 Air New Zealand 10 2026-07-22
ANZ612 - 9 2026-07-08
ANZ582 - 9 2026-07-12
ANZ527 Air New Zealand 9 2026-07-24
ANZ445 - 9 2026-07-14
ANZ429 - 9 2026-07-15
ANZ384 - 9 2026-06-29
ANZ377 - 9 2026-06-29
ANZ332 - 9 2026-07-17
ANZ542 Air New Zealand 8 2026-07-26
ANZ402 - 8 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ANZ584 CHC → AKL Jul 26, 19:10 UTCJul 26, 20:15 UTC1h 5m
2026-07-26 ANZ569 AKL → CHC Jul 26, 08:50 UTCJul 26, 10:00 UTC1h 10m
2026-07-26 ANZ440 WLG → AKL Jul 26, 04:20 UTCJul 26, 05:15 UTC55m
2026-07-26 ANZ433 AKL → WLG Jul 26, 02:45 UTCJul 26, 03:25 UTC40m
2026-07-26 ANZ542 CHC → AKL Jul 26, 00:25 UTCJul 26, 01:30 UTC1h 5m
2026-07-25 ANZ531 AKL → CHC Jul 25, 22:20 UTCJul 25, 23:25 UTC1h 5m
2026-07-25 ANZ586 CHC → AKL Jul 25, 20:10 UTCJul 25, 21:15 UTC1h 5m
2026-07-25 ANZ567 AKL → CHC Jul 25, 07:10 UTCJul 25, 08:20 UTC1h 10m
2026-07-25 ANZ558 CHC → AKL Jul 25, 04:20 UTCJul 25, 05:30 UTC1h 10m
2026-07-25 ANZ543 AKL → CHC Jul 25, 01:40 UTCJul 25, 02:50 UTC1h 10m
2026-07-24 ANZ538 CHC → AKL Jul 24, 23:35 UTCJul 25, 00:40 UTC1h 5m
2026-07-24 ANZ527 AKL → CHC Jul 24, 21:15 UTCJul 24, 22:25 UTC1h 10m
2026-07-24 ANZ584 CHC → AKL Jul 24, 19:00 UTCJul 24, 20:05 UTC1h 5m
2026-07-24 ANZ571 AKL → CHC Jul 24, 08:15 UTCJul 24, 09:20 UTC1h 5m
2026-07-24 ANZ448 WLG → AKL Jul 24, 06:15 UTCJul 24, 07:10 UTC55m
2026-07-24 ANZ441 AKL → WLG Jul 24, 04:15 UTCJul 24, 05:05 UTC50m
2026-07-24 ANZ620 ZQN → AKL Jul 24, 01:15 UTCJul 24, 02:50 UTC1h 35m
2026-07-23 ANZ617 AKL → ZQN Jul 23, 23:25 UTCJul 24, 00:00 UTC35m
2026-07-23 ANZ617 AKL → ZQN Jul 23, 22:40 UTCJul 23, 23:20 UTC40m
2026-07-23 ANZ534 CHC → AKL Jul 23, 20:20 UTCJul 23, 21:25 UTC1h 5m
2026-07-23 ANZ515 AKL → CHC Jul 23, 18:15 UTCJul 23, 19:25 UTC1h 10m
2026-07-23 ANZ588 CHC → AKL Jul 23, 09:15 UTCJul 23, 10:20 UTC1h 5m
2026-07-23 ANZ567 AKL → CHC Jul 23, 07:10 UTCJul 23, 08:20 UTC1h 10m
2026-07-23 ANZ558 CHC → AKL Jul 23, 05:05 UTCJul 23, 06:15 UTC1h 10m
2026-07-23 ANZ547 AKL → CHC Jul 23, 03:10 UTCJul 23, 04:15 UTC1h 5m
2026-07-22 ANZ538 CHC → AKL Jul 22, 23:10 UTCJul 23, 00:15 UTC1h 5m
2026-07-22 ANZ521 AKL → CHC Jul 22, 20:50 UTCJul 22, 22:00 UTC1h 10m
2026-07-22 ANZ406 WLG → AKL Jul 22, 18:35 UTCJul 22, 19:30 UTC55m
2026-07-22 ANZ441 AKL → WLG Jul 22, 04:10 UTCJul 22, 04:55 UTC45m
2026-07-22 ANZ432 WLG → AKL Jul 22, 02:15 UTCJul 22, 03:00 UTC45m
2026-07-22 ANZ425 AKL → WLG Jul 22, 00:25 UTCJul 22, 01:15 UTC50m
2026-07-21 ANZ676 - Jul 21, 21:40 UTCJul 21, 23:05 UTC1h 25m
2026-07-21 ANZ673 AKL → DUD Jul 21, 19:15 UTCJul 21, 20:50 UTC1h 35m
2026-07-21 ANZ456 WLG → AKL Jul 21, 08:05 UTCJul 21, 08:50 UTC45m
2026-07-21 ANZ449 AKL → WLG Jul 21, 06:15 UTCJul 21, 07:10 UTC55m
2026-07-21 ANZ660 DUD → AKL Jul 21, 03:15 UTCJul 21, 04:40 UTC1h 25m
2026-07-21 ANZ675 AKL → DUD Jul 21, 00:40 UTCJul 21, 02:20 UTC1h 40m
2026-07-20 ANZ676 - Jul 20, 21:50 UTCJul 20, 23:15 UTC1h 25m
2026-07-20 ANZ673 AKL → DUD Jul 20, 19:10 UTCJul 20, 21:00 UTC1h 50m
2026-07-20 ANZ574 - Jul 20, 08:40 UTCJul 20, 09:30 UTC50m
2026-07-20 ANZ563 AKL → CHC Jul 20, 06:45 UTCJul 20, 07:50 UTC1h 5m
2026-07-20 ANZ558 CHC → AKL Jul 20, 04:30 UTCJul 20, 05:20 UTC50m
2026-07-20 ANZ547 - Jul 20, 02:20 UTCJul 20, 03:30 UTC1h 10m
2026-07-20 ANZ542 - Jul 20, 00:15 UTCJul 20, 01:10 UTC55m
2026-07-19 ANZ644 - Jul 19, 22:45 UTCJul 19, 23:15 UTC30m
2026-07-19 ANZ659 CHC → ZQN Jul 19, 21:00 UTCJul 19, 21:45 UTC45m
2026-07-19 ANZ327 WLG → CHC Jul 19, 19:05 UTCJul 19, 19:40 UTC35m
2026-07-19 ANZ459 AKL → WLG Jul 19, 08:40 UTCJul 19, 09:25 UTC45m
2026-07-19 ANZ466 - Jul 19, 07:00 UTCJul 19, 07:40 UTC40m
2026-07-19 ANZ690 DUD → WLG Jul 19, 04:35 UTCJul 19, 05:35 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-OJQ page for operator, model, and routing details .

Mode-S C81D9D frequently asked

What is Mode-S code C81D9D?
C81D9D is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-OJQ.
Where is Mode-S C81D9D registered?
Mode-S code C81D9D 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 C81D9D broadcasting right now?
Yes. Mode-S C81D9D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81D9D, octal 62016635, decimal 13,114,781.
What flights does C81D9D operate?
Mode-S C81D9D has broadcast 20 distinct callsigns, including ANZ573, ANZ676, ANZ673, ANZ558, ANZ466.