Apparatus

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sensors Mode-S transponder

C81BB3

ICAO 24-bit transponder address · allocated to New Zealand

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

Hex
C81BB3
Octal
62015663
Decimal
13,114,291
Country
NZ
Tail
ZK-NFA
Type
DH8C
No current signal · last broadcast 13h ago
Flights observed
488
Distinct callsigns
20
Country
NZ
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S C81BB3.

Country allocation

The ICAO 24-bit address C81BB3 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
ANZ321L - 9 2026-07-12
ANZ289L - 8 2026-07-01
ANZ167L - 8 2026-07-01
ANZ129L - 8 2026-06-19
ANZ128L - 8 2026-06-19
ANZ895L - 7 2026-07-12
ANZ886L - 7 2026-07-12
ANZ739L - 7 2026-06-30
ANZ736L - 7 2026-06-30
ANZ729L - 7 2026-07-02
ANZ302L - 7 2026-07-12
ANZ193L - 7 2026-06-13
ANZ171L - 7 2026-07-13
ANZ841L - 6 2026-06-23
ANZ769L - 6 2026-06-23
ANZ730L - 6 2026-07-02
ANZ726L - 6 2026-07-09
ANZ325L - 6 2026-06-29
ANZ323L - 6 2026-07-12
ANZ208L Air New Zealand 6 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ANZ146L - Jul 13, 21:10 UTCJul 13, 21:40 UTC30m
2026-07-13 ANZ127L - Jul 13, 20:00 UTCJul 13, 20:30 UTC30m
2026-07-13 ANZ229L - Jul 13, 18:00 UTCJul 13, 18:25 UTC25m
2026-07-13 ANZ226L - Jul 13, 08:25 UTCJul 13, 08:50 UTC25m
2026-07-13 ANZ172L - Jul 13, 06:20 UTCJul 13, 07:10 UTC50m
2026-07-13 ANZ171L - Jul 13, 04:45 UTCJul 13, 05:31 UTC45m
2026-07-12 ANZ166L - Jul 12, 23:35 UTCJul 13, 00:25 UTC50m
2026-07-12 ANZ282L - Jul 12, 21:15 UTCJul 12, 22:10 UTC55m
2026-07-12 ANZ302L - Jul 12, 19:50 UTCJul 12, 20:10 UTC20m
2026-07-12 ANZ321L - Jul 12, 06:50 UTCJul 12, 06:55 UTC5m
2026-07-12 ANZ895L NPE → WLG Jul 12, 04:50 UTCJul 12, 05:35 UTC45m
2026-07-12 ANZ886L WLG → NPE Jul 12, 03:25 UTCJul 12, 04:05 UTC40m
2026-07-12 ANZ314L - Jul 12, 01:50 UTCJul 12, 02:10 UTC20m
2026-07-12 ANZ323L - Jul 12, 00:05 UTCJul 12, 00:10 UTC5m
2026-07-11 ANZ793L NPL → WLG Jul 11, 22:30 UTCJul 11, 23:15 UTC45m
2026-07-11 ANZ792L WLG → NPL Jul 11, 21:00 UTCJul 11, 21:40 UTC40m
2026-07-11 ANZ895L NPE → WLG Jul 11, 04:55 UTCJul 11, 05:45 UTC50m
2026-07-11 ANZ886L WLG → NPE Jul 11, 03:30 UTCJul 11, 04:15 UTC45m
2026-07-11 ANZ314L - Jul 11, 02:00 UTCJul 11, 02:20 UTC20m
2026-07-11 ANZ323L - Jul 11, 00:05 UTCJul 11, 00:25 UTC20m
2026-07-10 ANZ793L NPL → WLG Jul 10, 22:35 UTCJul 10, 23:15 UTC40m
2026-07-10 ANZ792L WLG → NPL Jul 10, 21:10 UTCJul 10, 21:55 UTC45m
2026-07-10 ANZ302L - Jul 10, 19:55 UTCJul 10, 20:10 UTC15m
2026-07-10 ANZ321L - Jul 10, 06:45 UTCJul 10, 07:00 UTC15m
2026-07-10 ANZ524L - Jul 10, 04:35 UTCJul 10, 04:55 UTC20m
2026-07-10 ANZ323L - Jul 10, 00:20 UTCJul 10, 00:35 UTC15m
2026-07-09 ANZ726L - Jul 9, 21:10 UTCJul 9, 21:35 UTC25m
2026-07-09 ANZ725L WLG → BHE Jul 9, 20:10 UTCJul 9, 20:25 UTC15m
2026-07-09 ANZ300L - Jul 9, 18:55 UTCJul 9, 19:15 UTC20m
2026-07-09 ANZ321L WLG → NSN Jul 9, 07:15 UTCJul 9, 07:35 UTC20m
2026-07-09 ANZ259L - Jul 9, 01:05 UTCJul 9, 02:15 UTC1h 10m
2026-07-08 ANZ260L WLG → TRG Jul 8, 23:10 UTCJul 9, 00:15 UTC1h 5m
2026-07-08 ANZ231L - Jul 8, 20:45 UTCJul 8, 21:45 UTC1h 0m
2026-07-08 ANZ238L - Jul 8, 19:00 UTCJul 8, 20:05 UTC1h 5m
2026-07-08 ANZ235L - Jul 8, 06:05 UTCJul 8, 07:05 UTC1h 0m
2026-07-08 ANZ230L - Jul 8, 04:25 UTCJul 8, 05:25 UTC1h 0m
2026-07-08 ANZ308L - Jul 8, 01:25 UTCJul 8, 01:45 UTC20m
2026-07-07 ANZ517L WLG → NSN Jul 7, 23:15 UTCJul 7, 23:35 UTC20m
2026-07-07 ANZ231L - Jul 7, 20:45 UTCJul 7, 21:45 UTC1h 0m
2026-07-07 ANZ238L - Jul 7, 19:00 UTCJul 7, 20:00 UTC1h 0m
2026-07-06 ANZ507L GIS → WLG Jul 6, 21:05 UTCJul 6, 21:50 UTC45m
2026-07-06 ANZ286L - Jul 6, 05:40 UTCJul 6, 06:45 UTC1h 5m
2026-07-06 ANZ987L - Jul 6, 02:35 UTCJul 6, 03:45 UTC1h 10m
2026-07-05 ANZ146L - Jul 5, 21:15 UTCJul 5, 21:40 UTC25m
2026-07-05 ANZ127L - Jul 5, 20:15 UTCJul 5, 20:35 UTC20m
2026-07-05 ANZ080L - Jul 5, 07:35 UTCJul 5, 08:30 UTC55m
2026-07-05 ANZ583L - Jul 5, 05:15 UTCJul 5, 05:55 UTC40m
2026-07-05 ANZ212L - Jul 5, 02:25 UTCJul 5, 03:45 UTC1h 20m
2026-07-05 ANZ509L - Jul 5, 00:25 UTCJul 5, 01:30 UTC1h 5m
2026-07-04 ANZ088L - Jul 4, 22:40 UTCJul 4, 23:35 UTC55m

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

Mode-S C81BB3 frequently asked

What is Mode-S code C81BB3?
C81BB3 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NFA.
Where is Mode-S C81BB3 registered?
Mode-S code C81BB3 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 C81BB3 broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81BB3, octal 62015663, decimal 13,114,291.
What flights does C81BB3 operate?
Mode-S C81BB3 has broadcast 20 distinct callsigns, including ANZ321L, ANZ289L, ANZ167L, ANZ129L, ANZ128L.