Apparatus

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sensors Mode-S transponder

C81C56

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-LJD · PIPER PA-28-140/150/160/180

Hex
C81C56
Octal
62016126
Decimal
13,114,454
Country
NZ
Tail
ZK-LJD
Type
P28A
No current signal · last broadcast 3h ago
Flights observed
240
Distinct callsigns
1
Country
NZ
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S C81C56.

Country allocation

The ICAO 24-bit address C81C56 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 1 distinct

Callsign Airline Flights Last seen
ZKLJD - 240 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ZKLJD - Jul 14, 06:40 UTCJul 14, 08:00 UTC1h 20m
2026-07-14 ZKLJD - Jul 14, 01:40 UTCJul 14, 02:40 UTC1h 0m
2026-07-13 ZKLJD - Jul 13, 22:35 UTCJul 13, 23:25 UTC50m
2026-07-13 ZKLJD - Jul 13, 20:50 UTCJul 13, 21:40 UTC50m
2026-07-13 ZKLJD CHC → CHC Jul 13, 03:40 UTCJul 13, 04:40 UTC1h 0m
2026-07-13 ZKLJD CHC → CHC Jul 13, 01:25 UTCJul 13, 02:15 UTC50m
2026-07-12 ZKLJD - Jul 12, 23:20 UTCJul 13, 00:01 UTC40m
2026-07-12 ZKLJD CHC → CHC Jul 12, 21:00 UTCJul 12, 22:25 UTC1h 25m
2026-07-12 ZKLJD - Jul 12, 04:15 UTCJul 12, 04:25 UTC10m
2026-07-12 ZKLJD - Jul 12, 00:50 UTCJul 12, 02:20 UTC1h 30m
2026-07-11 ZKLJD - Jul 11, 23:30 UTCJul 12, 00:05 UTC35m
2026-07-11 ZKLJD CHC → CHC Jul 11, 03:40 UTCJul 11, 04:40 UTC1h 0m
2026-07-11 ZKLJD CHC → CHC Jul 11, 01:25 UTCJul 11, 02:45 UTC1h 20m
2026-07-10 ZKLJD - Jul 10, 22:25 UTCJul 10, 23:35 UTC1h 10m
2026-07-10 ZKLJD - Jul 10, 20:35 UTCJul 10, 21:50 UTC1h 15m
2026-07-10 ZKLJD - Jul 10, 03:50 UTCJul 10, 04:50 UTC1h 0m
2026-07-09 ZKLJD - Jul 9, 22:15 UTCJul 9, 23:55 UTC1h 40m
2026-07-09 ZKLJD - Jul 9, 20:35 UTCJul 9, 21:45 UTC1h 10m
2026-07-09 ZKLJD - Jul 9, 03:20 UTCJul 9, 04:15 UTC55m
2026-07-09 ZKLJD CHC → CHC Jul 9, 01:15 UTCJul 9, 02:30 UTC1h 15m
2026-07-08 ZKLJD - Jul 8, 22:45 UTCJul 8, 23:30 UTC45m
2026-07-08 ZKLJD - Jul 8, 03:35 UTCJul 8, 04:25 UTC50m
2026-07-04 ZKLJD - Jul 4, 22:40 UTCJul 4, 23:25 UTC45m
2026-07-04 ZKLJD - Jul 4, 01:35 UTCJul 4, 02:30 UTC55m
2026-07-03 ZKLJD CHC → CHC Jul 3, 21:00 UTCJul 3, 21:55 UTC55m
2026-07-03 ZKLJD - Jul 3, 03:55 UTCJul 3, 04:45 UTC50m
2026-07-03 ZKLJD - Jul 3, 01:45 UTCJul 3, 03:10 UTC1h 25m
2026-07-03 ZKLJD - Jul 3, 00:25 UTCJul 3, 01:10 UTC45m
2026-07-02 ZKLJD - Jul 2, 22:35 UTCJul 2, 23:40 UTC1h 5m
2026-07-02 ZKLJD - Jul 2, 21:25 UTCJul 2, 22:00 UTC35m
2026-07-02 ZKLJD - Jul 2, 03:50 UTCJul 2, 04:40 UTC50m
2026-07-01 ZKLJD - Jul 1, 23:15 UTCJul 2, 00:30 UTC1h 15m
2026-07-01 ZKLJD CHC → CHC Jul 1, 03:55 UTCJul 1, 04:45 UTC50m
2026-07-01 ZKLJD - Jul 1, 01:50 UTCJul 1, 02:45 UTC55m
2026-07-01 ZKLJD CHC → CHC Jul 1, 00:35 UTCJul 1, 00:45 UTC10m
2026-06-30 ZKLJD - Jun 30, 22:40 UTCJun 30, 23:50 UTC1h 10m
2026-06-30 ZKLJD - Jun 30, 20:50 UTCJun 30, 21:50 UTC1h 0m
2026-06-29 ZKLJD CHC → CHC Jun 29, 06:24 UTCJun 29, 07:25 UTC1h 0m
2026-06-29 ZKLJD - Jun 29, 03:39 UTCJun 29, 04:39 UTC1h 0m
2026-06-29 ZKLJD CHC → CHC Jun 29, 01:34 UTCJun 29, 02:50 UTC1h 15m
2026-06-27 ZKLJD - Jun 27, 20:59 UTCJun 27, 22:35 UTC1h 35m
2026-06-27 ZKLJD - Jun 27, 03:34 UTCJun 27, 04:34 UTC1h 0m
2026-06-27 ZKLJD - Jun 27, 01:39 UTCJun 27, 02:39 UTC1h 0m
2026-06-26 ZKLJD - Jun 26, 20:44 UTCJun 26, 21:45 UTC1h 0m
2026-06-26 ZKLJD - Jun 26, 03:39 UTCJun 26, 04:50 UTC1h 10m
2026-06-26 ZKLJD - Jun 26, 01:29 UTCJun 26, 02:20 UTC50m
2026-06-25 ZKLJD CHC → CHC Jun 25, 22:29 UTCJun 25, 23:49 UTC1h 20m
2026-06-24 ZKLJD - Jun 24, 20:40 UTCJun 24, 21:34 UTC55m
2026-06-24 ZKLJD - Jun 24, 01:49 UTCJun 24, 03:00 UTC1h 10m
2026-06-23 ZKLJD - Jun 23, 22:44 UTCJun 23, 23:34 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-LJD page for operator, model, and routing details .

Mode-S C81C56 frequently asked

What is Mode-S code C81C56?
C81C56 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-LJD.
Where is Mode-S C81C56 registered?
Mode-S code C81C56 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 C81C56 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81C56, octal 62016126, decimal 13,114,454.
What flights does C81C56 operate?
Mode-S C81C56 has broadcast 1 distinct callsign, including ZKLJD.