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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
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
507
Distinct callsigns
20
Country
NZ
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S C81AC0.

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

Callsign Airline Flights Last seen
ANZ208L - 9 2026-07-23
ANZ854L - 8 2026-06-28
ANZ769L - 8 2026-07-19
ANZ848L - 7 2026-07-20
ANZ841L - 7 2026-06-24
ANZ763L - 7 2026-07-19
ANZ375L Air New Zealand 7 2026-07-24
ANZ087L Air New Zealand 7 2026-06-07
ANZ832L - 6 2026-06-24
ANZ793L - 6 2026-07-15
ANZ792L - 6 2026-07-15
ANZ768L - 6 2026-07-19
ANZ318L - 6 2026-06-18
ANZ205L - 6 2026-07-08
ANZ092L - 6 2026-06-26
ANZ064L - 6 2026-07-07
ANZ837L - 5 2026-06-24
ANZ730L Air New Zealand 5 2026-06-11
ANZ729L Air New Zealand 5 2026-06-11
ANZ726L - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ANZ884L WLG → NPE Jul 26, 21:15 UTCJul 26, 21:55 UTC40m
2026-07-26 ANZ334L CHC → WLG Jul 26, 19:55 UTCJul 26, 20:40 UTC45m
2026-07-24 ANZ375L WLG → CHC Jul 24, 06:05 UTCJul 24, 06:50 UTC45m
2026-07-24 ANZ795L NPL → WLG Jul 24, 04:30 UTCJul 24, 05:10 UTC40m
2026-07-24 ANZ796L WLG → NPL Jul 24, 02:55 UTCJul 24, 03:35 UTC40m
2026-07-23 ANZ306L NSN → WLG Jul 23, 22:50 UTCJul 23, 23:20 UTC30m
2026-07-23 ANZ061L AKL → NSN Jul 23, 20:20 UTCJul 23, 21:55 UTC1h 35m
2026-07-23 ANZ971L AKL → WLG Jul 23, 18:10 UTCJul 23, 18:35 UTC25m
2026-07-23 ANZ272L AKL → KKE Jul 23, 08:35 UTCJul 23, 09:00 UTC25m
2026-07-23 ANZ968L NSN → WLG Jul 23, 07:20 UTCJul 23, 07:45 UTC25m
2026-07-23 ANZ208L - Jul 23, 01:20 UTCJul 23, 02:25 UTC1h 5m
2026-07-22 ANZ208L - Jul 22, 18:45 UTCJul 22, 20:15 UTC1h 30m
2026-07-22 ANZ066L NSN → AKL Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-22 ANZ073L AKL → NSN Jul 22, 02:30 UTCJul 22, 03:55 UTC1h 25m
2026-07-21 ANZ166L GIS → AKL Jul 21, 23:35 UTCJul 22, 00:20 UTC45m
2026-07-21 ANZ282L WLG → GIS Jul 21, 21:10 UTCJul 21, 22:00 UTC50m
2026-07-21 ANZ302L - Jul 21, 19:50 UTCJul 21, 20:15 UTC25m
2026-07-21 ANZ321L - Jul 21, 06:50 UTCJul 21, 07:15 UTC25m
2026-07-21 ANZ524L - Jul 21, 04:30 UTCJul 21, 04:55 UTC25m
2026-07-20 ANZ061L - Jul 20, 20:10 UTCJul 20, 21:25 UTC1h 15m
2026-07-20 ANZ275L KKE → AKL Jul 20, 18:05 UTCJul 20, 18:35 UTC30m
2026-07-20 ANZ272L AKL → KKE Jul 20, 08:05 UTCJul 20, 08:30 UTC25m
2026-07-20 ANZ096L TUO → AKL Jul 20, 06:20 UTCJul 20, 07:00 UTC40m
2026-07-20 ANZ095L AKL → TUO Jul 20, 05:05 UTCJul 20, 05:30 UTC25m
2026-07-20 ANZ076L - Jul 20, 03:00 UTCJul 20, 04:05 UTC1h 5m
2026-07-20 ANZ848L - Jul 20, 01:15 UTCJul 20, 02:05 UTC50m
2026-07-19 ANZ769L NPL → CHC Jul 19, 22:45 UTCJul 20, 00:10 UTC1h 25m
2026-07-19 ANZ768L - Jul 19, 20:25 UTCJul 19, 21:35 UTC1h 10m
2026-07-19 ANZ331L WLG → CHC Jul 19, 18:35 UTCJul 19, 19:25 UTC50m
2026-07-19 ANZ382L CHC → WLG Jul 19, 07:25 UTCJul 19, 08:20 UTC55m
2026-07-19 ANZ763L - Jul 19, 05:05 UTCJul 19, 06:20 UTC1h 15m
2026-07-19 ANZ764L CHC → NPL Jul 19, 03:00 UTCJul 19, 04:20 UTC1h 20m
2026-07-19 ANZ859L NSN → CHC Jul 19, 01:15 UTCJul 19, 01:55 UTC40m
2026-07-18 ANZ844L CHC → NSN Jul 18, 23:45 UTCJul 19, 00:20 UTC35m
2026-07-16 ANZ375L WLG → CHC Jul 16, 06:00 UTCJul 16, 06:55 UTC55m
2026-07-16 ANZ795L - Jul 16, 04:20 UTCJul 16, 05:10 UTC50m
2026-07-16 ANZ796L WLG → NPL Jul 16, 03:00 UTCJul 16, 03:45 UTC45m
2026-07-16 ANZ308L - Jul 16, 01:25 UTCJul 16, 01:40 UTC15m
2026-07-16 ANZ323L - Jul 16, 00:05 UTCJul 16, 00:20 UTC15m
2026-07-15 ANZ793L - Jul 15, 22:30 UTCJul 15, 23:20 UTC50m
2026-07-15 ANZ792L WLG → NPL Jul 15, 21:10 UTCJul 15, 21:50 UTC40m
2026-07-15 ANZ251L - Jul 15, 18:40 UTCJul 15, 19:50 UTC1h 10m
2026-07-15 ANZ143L - Jul 15, 06:50 UTCJul 15, 07:15 UTC25m
2026-07-15 ANZ066L - Jul 15, 04:45 UTCJul 15, 05:35 UTC50m
2026-07-15 ANZ323L - Jul 15, 00:15 UTCJul 15, 00:35 UTC20m
2026-07-14 ANZ793L NPL → WLG Jul 14, 22:40 UTCJul 14, 23:25 UTC44m
2026-07-14 ANZ792L WLG → NPL Jul 14, 21:10 UTCJul 14, 21:55 UTC45m
2026-07-14 ANZ251L - Jul 14, 18:35 UTCJul 14, 19:45 UTC1h 10m
2026-07-14 ANZ262L - Jul 14, 07:20 UTCJul 14, 08:25 UTC1h 5m
2026-07-14 ANZ895L - Jul 14, 05:00 UTCJul 14, 05:50 UTC50m

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?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
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 ANZ208L, ANZ854L, ANZ769L, ANZ848L, ANZ841L.