Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

C81A5B

ICAO 24-bit transponder address · allocated to New Zealand

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

Hex
C81A5B
Octal
62015133
Decimal
13,113,947
Country
NZ
Tail
ZK-NER
Type
DH8C
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
518
Distinct callsigns
20
Country
NZ
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S C81A5B.

Country allocation

The ICAO 24-bit address C81A5B 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
ANZ763L - 10 2026-07-02
ANZ238L - 9 2026-06-28
ANZ231L - 9 2026-06-28
ANZ331L Air New Zealand 8 2026-07-20
ANZ305L Air New Zealand 8 2026-07-24
ANZ275L Air New Zealand 8 2026-07-21
ANZ272L Air New Zealand 8 2026-07-21
ANZ235L - 8 2026-07-17
ANZ793L - 7 2026-07-12
ANZ730L Air New Zealand 7 2026-07-25
ANZ729L Air New Zealand 7 2026-07-25
ANZ264L - 7 2026-07-19
ANZ258L Air New Zealand 7 2026-07-20
ANZ257L Air New Zealand 7 2026-07-20
ANZ255L - 7 2026-07-19
ANZ230L - 7 2026-07-17
ANZ192L - 7 2026-07-11
ANZ831L - 6 2026-07-20
ANZ830L - 6 2026-07-20
ANZ798L - 6 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ANZ221L - Jul 26, 21:35 UTCJul 26, 22:00 UTC25m
2026-07-26 ANZ220L - Jul 26, 20:30 UTCJul 26, 20:55 UTC25m
2026-07-26 ANZ160L GIS → AKL Jul 26, 18:25 UTCJul 26, 19:10 UTC45m
2026-07-26 ANZ286L WLG → GIS Jul 26, 06:05 UTCJul 26, 07:00 UTC56m
2026-07-26 ANZ289L GIS → WLG Jul 26, 03:30 UTCJul 26, 04:25 UTC55m
2026-07-26 ANZ167L AKL → GIS Jul 26, 02:05 UTCJul 26, 02:50 UTC45m
2026-07-25 ANZ088L NSN → AKL Jul 25, 22:10 UTCJul 25, 23:30 UTC1h 20m
2026-07-25 ANZ321L WLG → NSN Jul 25, 06:35 UTCJul 25, 07:10 UTC35m
2026-07-25 ANZ895L NPE → WLG Jul 25, 04:50 UTCJul 25, 05:40 UTC50m
2026-07-25 ANZ886L WLG → NPE Jul 25, 03:35 UTCJul 25, 04:15 UTC40m
2026-07-25 ANZ730L BHE → WLG Jul 25, 01:40 UTCJul 25, 02:00 UTC20m
2026-07-25 ANZ729L WLG → BHE Jul 25, 00:40 UTCJul 25, 00:55 UTC15m
2026-07-24 ANZ306L NSN → WLG Jul 24, 22:55 UTCJul 24, 23:20 UTC25m
2026-07-24 ANZ305L WLG → NSN Jul 24, 21:35 UTCJul 24, 22:05 UTC30m
2026-07-24 ANZ190L - Jul 24, 19:10 UTCJul 24, 20:10 UTC1h 0m
2026-07-24 ANZ199L - Jul 24, 05:55 UTCJul 24, 06:50 UTC55m
2026-07-24 ANZ289L GIS → WLG Jul 24, 03:40 UTCJul 24, 04:40 UTC1h 0m
2026-07-24 ANZ167L AKL → GIS Jul 24, 02:05 UTCJul 24, 02:45 UTC40m
2026-07-23 ANZ164L GIS → AKL Jul 23, 22:25 UTCJul 23, 23:20 UTC55m
2026-07-23 ANZ163L AKL → GIS Jul 23, 20:55 UTCJul 23, 21:35 UTC40m
2026-07-23 ANZ208L BHE → AKL Jul 23, 18:05 UTCJul 23, 19:20 UTC1h 15m
2026-07-23 ANZ205L AKL → BHE Jul 23, 06:50 UTCJul 23, 08:05 UTC1h 15m
2026-07-23 ANZ212L BHE → AKL Jul 23, 04:00 UTCJul 23, 05:20 UTC1h 20m
2026-07-23 ANZ509L AKL → BHE Jul 23, 01:15 UTCJul 23, 02:30 UTC1h 15m
2026-07-22 ANZ060L NSN → AKL Jul 22, 22:55 UTCJul 23, 00:25 UTC1h 30m
2026-07-22 ANZ063L - Jul 22, 19:05 UTCJul 22, 20:20 UTC1h 15m
2026-07-22 ANZ038L NPL → AKL Jul 22, 00:15 UTCJul 22, 00:40 UTC25m
2026-07-21 ANZ043L AKL → NPL Jul 21, 22:45 UTCJul 21, 23:05 UTC20m
2026-07-21 ANZ146L - Jul 21, 21:05 UTCJul 21, 21:25 UTC20m
2026-07-21 ANZ127L - Jul 21, 20:00 UTCJul 21, 20:25 UTC25m
2026-07-21 ANZ275L KKE → AKL Jul 21, 18:10 UTCJul 21, 18:40 UTC30m
2026-07-21 ANZ272L AKL → KKE Jul 21, 07:45 UTCJul 21, 08:10 UTC25m
2026-07-21 ANZ096L TUO → AKL Jul 21, 06:15 UTCJul 21, 06:50 UTC35m
2026-07-21 ANZ095L AKL → TUO Jul 21, 04:55 UTCJul 21, 05:30 UTC35m
2026-07-21 ANZ076L NSN → AKL Jul 21, 03:00 UTCJul 21, 04:05 UTC1h 5m
2026-07-21 ANZ848L - Jul 21, 01:15 UTCJul 21, 01:50 UTC35m
2026-07-20 ANZ831L - Jul 20, 22:20 UTCJul 20, 22:35 UTC15m
2026-07-20 ANZ830L - Jul 20, 20:45 UTCJul 20, 21:05 UTC20m
2026-07-20 ANZ331L WLG → CHC Jul 20, 18:40 UTCJul 20, 19:35 UTC55m
2026-07-20 ANZ257L TRG → WLG Jul 20, 06:10 UTCJul 20, 07:10 UTC1h 0m
2026-07-20 ANZ258L WLG → TRG Jul 20, 04:30 UTCJul 20, 05:35 UTC1h 5m
2026-07-19 ANZ255L - Jul 19, 23:15 UTCJul 20, 00:15 UTC1h 0m
2026-07-19 ANZ264L WLG → TRG Jul 19, 21:00 UTCJul 19, 22:05 UTC1h 5m
2026-07-19 ANZ251L - Jul 19, 19:00 UTCJul 19, 20:00 UTC1h 0m
2026-07-19 ANZ262L - Jul 19, 07:20 UTCJul 19, 08:20 UTC1h 0m
2026-07-19 ANZ895L NPE → WLG Jul 19, 05:00 UTCJul 19, 05:45 UTC45m
2026-07-19 ANZ886L WLG → NPE Jul 19, 03:30 UTCJul 19, 04:20 UTC50m
2026-07-19 ANZ730L - Jul 19, 01:40 UTCJul 19, 02:00 UTC20m
2026-07-19 ANZ729L WLG → BHE Jul 19, 00:40 UTCJul 19, 00:50 UTC10m
2026-07-18 ANZ306L NSN → WLG Jul 18, 22:45 UTCJul 18, 23:10 UTC25m

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

Mode-S C81A5B frequently asked

What is Mode-S code C81A5B?
C81A5B is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NER.
Where is Mode-S C81A5B registered?
Mode-S code C81A5B 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 C81A5B 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 C81A5B, octal 62015133, decimal 13,113,947.
What flights does C81A5B operate?
Mode-S C81A5B has broadcast 20 distinct callsigns, including ANZ763L, ANZ238L, ANZ231L, ANZ331L, ANZ305L.