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sensors Mode-S transponder

C819DD

ICAO 24-bit transponder address · allocated to New Zealand

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

Hex
C819DD
Octal
62014735
Decimal
13,113,821
Country
NZ
Tail
ZK-NEK
Type
DH8C
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
559
Distinct callsigns
20
Country
NZ
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S C819DD.

Country allocation

The ICAO 24-bit address C819DD 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 - 12 2026-06-22
ANZ323L Air New Zealand 10 2026-07-23
ANZ171L Air New Zealand 10 2026-07-19
ANZ172L Air New Zealand 9 2026-07-19
ANZ764L - 8 2026-06-22
ANZ229L - 8 2026-07-14
ANZ226L - 8 2026-07-14
ANZ193L - 8 2026-06-19
ANZ164L - 8 2026-07-13
ANZ163L - 8 2026-07-13
ANZ509L - 7 2026-07-19
ANZ318L - 7 2026-07-08
ANZ212L - 7 2026-07-19
ANZ208L - 7 2026-07-13
ANZ205L - 7 2026-07-13
ANZ192L - 7 2026-06-20
ANZ885L - 6 2026-06-22
ANZ854L - 6 2026-06-16
ANZ315L Air New Zealand 6 2026-07-22
ANZ314L Air New Zealand 6 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ANZ830L - Jul 26, 21:05 UTCJul 26, 21:15 UTC10m
2026-07-26 ANZ841L NSN → CHC Jul 26, 19:05 UTCJul 26, 19:50 UTC45m
2026-07-26 ANZ317L WLG → NSN Jul 26, 04:55 UTCJul 26, 05:20 UTC25m
2026-07-26 ANZ314L NSN → WLG Jul 26, 01:50 UTCJul 26, 02:15 UTC25m
2026-07-25 ANZ844L CHC → NSN Jul 25, 23:50 UTCJul 26, 00:30 UTC40m
2026-07-24 ANZ831L - Jul 24, 22:10 UTCJul 24, 22:30 UTC20m
2026-07-24 ANZ830L - Jul 24, 20:55 UTCJul 24, 21:10 UTC15m
2026-07-24 ANZ841L NSN → CHC Jul 24, 18:45 UTCJul 24, 19:25 UTC40m
2026-07-24 ANZ325L WLG → NSN Jul 24, 08:05 UTCJul 24, 08:35 UTC30m
2026-07-24 ANZ235L ROT → WLG Jul 24, 06:05 UTCJul 24, 07:05 UTC1h 0m
2026-07-24 ANZ230L WLG → ROT Jul 24, 04:30 UTCJul 24, 05:25 UTC55m
2026-07-23 ANZ350L CHC → WLG Jul 23, 23:50 UTCJul 24, 00:40 UTC50m
2026-07-23 ANZ831L - Jul 23, 22:25 UTCJul 23, 22:40 UTC15m
2026-07-23 ANZ830L - Jul 23, 21:10 UTCJul 23, 21:25 UTC15m
2026-07-23 ANZ331L WLG → CHC Jul 23, 19:10 UTCJul 23, 20:05 UTC55m
2026-07-23 ANZ257L TRG → WLG Jul 23, 05:55 UTCJul 23, 07:05 UTC1h 10m
2026-07-23 ANZ258L WLG → TRG Jul 23, 04:10 UTCJul 23, 05:10 UTC1h 0m
2026-07-23 ANZ314L NSN → WLG Jul 23, 01:55 UTCJul 23, 02:25 UTC30m
2026-07-23 ANZ323L WLG → NSN Jul 23, 00:15 UTCJul 23, 00:45 UTC30m
2026-07-22 ANZ306L NSN → WLG Jul 22, 23:05 UTCJul 22, 23:30 UTC25m
2026-07-22 ANZ315L WLG → NSN Jul 22, 20:40 UTCJul 22, 21:05 UTC25m
2026-07-22 ANZ251L TRG → WLG Jul 22, 18:35 UTCJul 22, 19:50 UTC1h 15m
2026-07-22 ANZ223L - Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-22 ANZ222L - Jul 22, 04:05 UTCJul 22, 04:30 UTC25m
2026-07-21 ANZ128L TRG → AKL Jul 21, 22:00 UTCJul 21, 22:25 UTC25m
2026-07-21 ANZ129L AKL → TRG Jul 21, 20:50 UTCJul 21, 21:15 UTC25m
2026-07-20 ANZ092L - Jul 20, 22:40 UTCJul 20, 23:10 UTC30m
2026-07-20 ANZ091L - Jul 20, 21:25 UTCJul 20, 21:55 UTC30m
2026-07-19 ANZ172L GIS → AKL Jul 19, 06:20 UTCJul 19, 07:10 UTC50m
2026-07-19 ANZ171L AKL → GIS Jul 19, 04:55 UTCJul 19, 05:35 UTC40m
2026-07-19 ANZ212L - Jul 19, 02:35 UTCJul 19, 03:45 UTC1h 10m
2026-07-19 ANZ509L - Jul 19, 00:10 UTCJul 19, 01:25 UTC1h 15m
2026-07-18 ANZ204L BHE → AKL Jul 18, 21:35 UTCJul 18, 22:50 UTC1h 15m
2026-07-18 ANZ209L AKL → BHE Jul 18, 03:50 UTCJul 18, 05:05 UTC1h 15m
2026-07-18 ANZ273L - Jul 18, 01:00 UTCJul 18, 01:30 UTC30m
2026-07-17 ANZ276L - Jul 17, 23:35 UTCJul 17, 23:55 UTC20m
2026-07-17 ANZ080L - Jul 17, 07:14 UTCJul 17, 08:30 UTC1h 15m
2026-07-17 ANZ583L AKL → NSN Jul 17, 05:15 UTCJul 17, 06:35 UTC1h 20m
2026-07-17 ANZ212L - Jul 17, 02:39 UTCJul 17, 03:50 UTC1h 10m
2026-07-17 ANZ509L - Jul 17, 00:40 UTCJul 17, 01:55 UTC1h 15m
2026-07-16 ANZ172L - Jul 16, 06:30 UTCJul 16, 07:15 UTC45m
2026-07-16 ANZ171L - Jul 16, 04:55 UTCJul 16, 05:40 UTC45m
2026-07-16 ANZ128L - Jul 16, 00:55 UTCJul 16, 01:25 UTC30m
2026-07-15 ANZ129L - Jul 15, 23:50 UTCJul 16, 00:15 UTC25m
2026-07-15 ANZ160L - Jul 15, 21:50 UTCJul 15, 22:50 UTC1h 0m
2026-07-15 ANZ161L - Jul 15, 07:25 UTCJul 15, 08:05 UTC40m
2026-07-15 ANZ138L - Jul 15, 04:40 UTCJul 15, 05:05 UTC25m
2026-07-15 ANZ137L - Jul 15, 03:30 UTCJul 15, 03:55 UTC25m
2026-07-14 ANZ229L - Jul 14, 21:20 UTCJul 14, 21:45 UTC25m
2026-07-14 ANZ226L AKL → WRE Jul 14, 08:20 UTCJul 14, 08:50 UTC30m

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

Mode-S C819DD frequently asked

What is Mode-S code C819DD?
C819DD is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NEK.
Where is Mode-S C819DD registered?
Mode-S code C819DD 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 C819DD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C819DD, octal 62014735, decimal 13,113,821.
What flights does C819DD operate?
Mode-S C819DD has broadcast 20 distinct callsigns, including ANZ763L, ANZ323L, ANZ171L, ANZ172L, ANZ764L.