Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

C81C28

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-NPL · CESSNA 152

Hex
C81C28
Octal
62016050
Decimal
13,114,408
Country
NZ
Tail
ZK-NPL
Type
C152
No current signal · last broadcast 9h ago
Flights observed
192
Distinct callsigns
1
Country
NZ
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S C81C28.

Country allocation

The ICAO 24-bit address C81C28 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
ZKTAY - 192 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ZKTAY - Jul 14, 03:00 UTCJul 14, 03:40 UTC40m
2026-07-14 ZKTAY - Jul 14, 01:15 UTCJul 14, 01:55 UTC40m
2026-07-13 ZKTAY - Jul 13, 21:55 UTCJul 13, 22:40 UTC45m
2026-07-13 ZKTAY - Jul 13, 00:05 UTCJul 13, 00:45 UTC40m
2026-07-12 ZKTAY TRG → TRG Jul 12, 04:35 UTCJul 12, 05:05 UTC30m
2026-07-11 ZKTAY - Jul 11, 23:55 UTCJul 12, 01:10 UTC1h 15m
2026-07-11 ZKTAY - Jul 11, 04:20 UTCJul 11, 04:40 UTC20m
2026-07-11 ZKTAY - Jul 11, 02:20 UTCJul 11, 03:01 UTC40m
2026-07-11 ZKTAY - Jul 11, 00:10 UTCJul 11, 00:40 UTC30m
2026-07-08 ZKTAY - Jul 8, 01:35 UTCJul 8, 02:30 UTC55m
2026-07-07 ZKTAY - Jul 7, 23:50 UTCJul 8, 00:20 UTC30m
2026-07-07 ZKTAY - Jul 7, 21:45 UTCJul 7, 22:20 UTC35m
2026-07-03 ZKTAY TRG → TRG Jul 3, 21:55 UTCJul 3, 22:45 UTC50m
2026-07-03 ZKTAY - Jul 3, 04:40 UTCJul 3, 05:20 UTC40m
2026-07-03 ZKTAY TRG → TRG Jul 3, 03:10 UTCJul 3, 03:35 UTC25m
2026-07-03 ZKTAY - Jul 3, 01:05 UTCJul 3, 01:55 UTC50m
2026-07-02 ZKTAY - Jul 2, 23:25 UTCJul 3, 00:00 UTC35m
2026-07-02 ZKTAY - Jul 2, 21:50 UTCJul 2, 22:30 UTC40m
2026-07-02 ZKTAY - Jul 2, 01:10 UTCJul 2, 01:55 UTC45m
2026-07-02 ZKTAY - Jul 2, 00:05 UTCJul 2, 00:30 UTC25m
2026-07-01 ZKTAY - Jul 1, 20:45 UTCJul 1, 21:15 UTC30m
2026-07-01 ZKTAY TRG → TRG Jul 1, 01:55 UTCJul 1, 02:35 UTC40m
2026-06-30 ZKTAY - Jun 30, 22:10 UTCJun 30, 22:50 UTC40m
2026-06-30 ZKTAY - Jun 30, 04:45 UTCJun 30, 05:15 UTC30m
2026-06-30 ZKTAY - Jun 30, 00:35 UTCJun 30, 01:14 UTC40m
2026-06-29 ZKTAY - Jun 29, 22:10 UTCJun 29, 23:05 UTC55m
2026-06-29 ZKTAY - Jun 29, 03:44 UTCJun 29, 04:09 UTC25m
2026-06-29 ZKTAY - Jun 29, 01:29 UTCJun 29, 02:30 UTC1h 0m
2026-06-28 ZKTAY - Jun 28, 22:34 UTCJun 28, 23:20 UTC45m
2026-06-28 ZKTAY - Jun 28, 02:44 UTCJun 28, 03:14 UTC30m
2026-06-28 ZKTAY - Jun 28, 01:04 UTCJun 28, 01:29 UTC25m
2026-06-27 ZKTAY TRG → TRG Jun 27, 22:49 UTCJun 27, 23:19 UTC30m
2026-06-27 ZKTAY - Jun 27, 02:04 UTCJun 27, 02:35 UTC30m
2026-06-22 ZKTAY - Jun 22, 21:59 UTCJun 22, 22:54 UTC55m
2026-06-22 ZKTAY - Jun 22, 03:35 UTCJun 22, 04:15 UTC40m
2026-06-22 ZKTAY - Jun 22, 00:40 UTCJun 22, 01:29 UTC50m
2026-06-21 ZKTAY - Jun 21, 21:39 UTCJun 21, 22:24 UTC45m
2026-06-20 ZKTAY - Jun 20, 05:54 UTCJun 20, 06:54 UTC1h 0m
2026-06-20 ZKTAY - Jun 20, 02:24 UTCJun 20, 03:29 UTC1h 5m
2026-06-20 ZKTAY - Jun 20, 00:49 UTCJun 20, 01:29 UTC40m
2026-06-19 ZKTAY - Jun 19, 21:14 UTCJun 19, 22:24 UTC1h 10m
2026-06-14 ZKTAY - Jun 14, 02:50 UTCJun 14, 03:50 UTC1h 0m
2026-06-14 ZKTAY - Jun 14, 01:00 UTCJun 14, 01:45 UTC45m
2026-06-13 ZKTAY - Jun 13, 23:50 UTCJun 14, 00:15 UTC25m
2026-06-12 ZKTAY - Jun 12, 21:50 UTCJun 12, 22:35 UTC45m
2026-06-11 ZKTAY TRG → TRG Jun 11, 04:15 UTCJun 11, 04:45 UTC30m
2026-06-10 ZKTAY - Jun 10, 03:15 UTCJun 10, 04:00 UTC45m
2026-06-10 ZKTAY TRG → TRG Jun 10, 00:25 UTCJun 10, 01:05 UTC40m
2026-06-09 ZKTAY TRG → TRG Jun 9, 01:20 UTCJun 9, 02:15 UTC55m
2026-06-08 ZKTAY TRG → TRG Jun 8, 21:10 UTCJun 8, 21:55 UTC45m

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

Mode-S C81C28 frequently asked

What is Mode-S code C81C28?
C81C28 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-NPL.
Where is Mode-S C81C28 registered?
Mode-S code C81C28 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 C81C28 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81C28, octal 62016050, decimal 13,114,408.
What flights does C81C28 operate?
Mode-S C81C28 has broadcast 1 distinct callsign, including ZKTAY.