sensors Mode-S transponder

C81AC0

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-NEW · DE HAVILLAND DHC-8-300 Dash 8

Hex
C81AC0
Octal
62015300
Decimal
13,114,048
Country
NZ
Tail
ZK-NEW
Type
DH8C
Broadcasting now · callsign ANZ192L · 23,000 ft
Flights observed
248
Distinct callsigns
20
Country
NZ
Last broadcast
1h ago

Current position

C81AC0 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C81AC0 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
2026-05-29 ANZ193L - May 29, 21:50 UTCMay 29, 22:55 UTC1h 5m
2026-05-29 ANZ336L CHC → WLG May 29, 20:10 UTCMay 29, 20:55 UTC45m
2026-05-29 ANZ763L NPL → CHC May 29, 06:00 UTCMay 29, 06:30 UTC30m
2026-05-29 ANZ763L NPL → CHC May 29, 05:10 UTCMay 29, 05:20 UTC10m
2026-05-29 ANZ764L CHC → NPL May 29, 03:15 UTCMay 29, 04:25 UTC1h 10m
2026-05-29 ANZ357L WLG → CHC May 29, 01:20 UTCMay 29, 02:05 UTC45m
2026-05-28 ANZ726L BHE → WLG May 28, 20:55 UTCMay 28, 21:00 UTC5m
2026-05-28 ANZ725L WLG → BHE May 28, 19:45 UTCMay 28, 19:50 UTC5m
2026-05-28 ANZ300L NSN → WLG May 28, 18:45 UTCMay 28, 18:55 UTC10m
2026-05-27 ANZ966L NSN → WLG May 27, 23:20 UTCMay 28, 00:05 UTC45m
2026-05-27 ANZ837L - May 27, 05:55 UTCMay 27, 06:15 UTC20m
2026-05-27 ANZ832L - May 27, 04:30 UTCMay 27, 04:55 UTC25m
2026-05-27 ANZ843L NSN → CHC May 27, 02:59 UTCMay 27, 03:29 UTC30m
2026-05-27 ANZ848L CHC → NSN May 27, 01:19 UTCMay 27, 01:44 UTC25m
2026-05-26 ANZ769L NPL → CHC May 26, 22:39 UTCMay 27, 00:10 UTC1h 30m
2026-05-26 ANZ768L CHC → NPL May 26, 20:20 UTCMay 26, 21:34 UTC1h 15m
2026-05-26 ANZ841L NSN → CHC May 26, 19:10 UTCMay 26, 19:34 UTC25m
2026-05-26 ANZ087L AKL → NSN May 26, 08:24 UTCMay 26, 09:15 UTC50m
2026-05-26 ANZ096L TUO → AKL May 26, 06:29 UTCMay 26, 07:10 UTC40m
2026-05-26 ANZ095L AKL → TUO May 26, 05:15 UTCMay 26, 05:45 UTC30m
2026-05-26 ANZ052L NPL → AKL May 26, 03:19 UTCMay 26, 04:00 UTC40m
2026-05-26 ANZ041L AKL → NPL May 26, 02:04 UTCMay 26, 02:44 UTC40m
2026-05-25 ANZ038L NPL → AKL May 25, 23:54 UTCMay 26, 00:29 UTC35m
2026-05-25 ANZ043L AKL → NPL May 25, 22:40 UTCMay 25, 23:14 UTC35m
2026-05-25 ANZ146L TRG → AKL May 25, 21:09 UTCMay 25, 21:30 UTC20m
2026-05-25 ANZ127L AKL → TRG May 25, 19:59 UTCMay 25, 20:24 UTC25m
2026-05-25 ANZ275L KKE → AKL May 25, 18:15 UTCMay 25, 18:45 UTC30m
2026-05-25 ANZ272L AKL → KKE May 25, 07:55 UTCMay 25, 08:20 UTC25m
2026-05-25 ANZ096L TUO → AKL May 25, 06:15 UTCMay 25, 06:45 UTC30m
2026-05-25 ANZ095L AKL → TUO May 25, 04:55 UTCMay 25, 05:30 UTC35m
2026-05-24 ANZ267L KKE → AKL May 24, 23:00 UTCMay 24, 23:20 UTC20m
2026-05-24 ANZ266L AKL → KKE May 24, 21:10 UTCMay 24, 21:35 UTC25m
2026-05-24 ANZ126L TRG → AKL May 24, 19:15 UTCMay 24, 19:40 UTC25m
2026-05-24 ANZ262L WLG → TRG May 24, 07:10 UTCMay 24, 08:05 UTC55m
2026-05-24 ANZ524L NSN → WLG May 24, 06:00 UTCMay 24, 06:10 UTC10m
2026-05-22 ANZ087L AKL → NSN May 22, 08:30 UTCMay 22, 09:15 UTC45m
2026-05-22 ANZ096L TUO → AKL May 22, 06:30 UTCMay 22, 07:10 UTC40m
2026-05-22 ANZ095L AKL → TUO May 22, 05:10 UTCMay 22, 05:40 UTC30m
2026-05-22 ANZ076L NSN → AKL May 22, 03:20 UTCMay 22, 04:10 UTC50m
2026-05-22 ANZ089L AKL → NSN May 22, 00:25 UTCMay 22, 01:20 UTC55m
2026-05-21 ANZ164L GIS → AKL May 21, 22:30 UTCMay 21, 23:20 UTC50m
2026-05-21 ANZ163L AKL → GIS May 21, 20:55 UTCMay 21, 21:40 UTC45m
2026-05-21 ANZ064L NSN → AKL May 21, 18:25 UTCMay 21, 19:20 UTC55m
2026-05-21 ANZ087L AKL → NSN May 21, 08:20 UTCMay 21, 09:00 UTC40m
2026-05-20 ANZ060L NSN → AKL May 20, 21:30 UTCMay 20, 22:15 UTC45m
2026-05-20 ANZ063L AKL → NSN May 20, 19:05 UTCMay 20, 19:50 UTC45m
2026-05-20 ANZ076L NSN → AKL May 20, 03:15 UTCMay 20, 04:05 UTC50m
2026-05-20 ANZ848L CHC → NSN May 20, 01:10 UTCMay 20, 01:35 UTC25m
2026-05-19 ANZ769L NPL → CHC May 19, 22:45 UTCMay 20, 00:00 UTC1h 15m
2026-05-19 ANZ768L CHC → NPL May 19, 20:35 UTCMay 19, 21:50 UTC1h 15m

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

Mode-S C81AC0 frequently asked

What is Mode-S code C81AC0?
C81AC0 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NEW.
Where is Mode-S C81AC0 registered?
Mode-S code C81AC0 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 C81AC0 broadcasting right now?
Yes. Mode-S C81AC0 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81AC0, octal 62015300, decimal 13,114,048.
What flights does C81AC0 operate?
Mode-S C81AC0 has broadcast 20 distinct callsigns, including ANZ841L, ANZ087L, ANZ848L, ANZ832L, ANZ769L.