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sensors Mode-S transponder

C81CE7

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-MTJ · DIAMOND DA-40 Club Star

Hex
C81CE7
Octal
62016347
Decimal
13,114,599
Country
NZ
Tail
ZK-MTJ
Type
DA40
No current signal · last broadcast 7h ago
Flights observed
53
Distinct callsigns
20
Country
NZ
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S C81CE7.

Country allocation

The ICAO 24-bit address C81CE7 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
MSY647 - 3 2026-07-06
MSY642 - 3 2026-07-11
MSY633 - 3 2026-06-28
MSY632 - 3 2026-07-13
MSY652 - 2 2026-07-11
MSY643 - 2 2026-07-07
MSY641 - 2 2026-07-01
MSY518 - 2 2026-07-13
MSY492 - 2 2026-07-14
MSY488 - 2 2026-06-30
MSY485 - 2 2026-06-12
MSY469 - 2 2026-06-12
MSY27 - 2 2026-06-29
MSY207 - 2 2026-06-13
MSY89 - 1 2026-07-01
MSY69 - 1 2026-06-22
MSY653 - 1 2026-06-10
MSY648 - 1 2026-06-10
MSY645 - 1 2026-06-03
MSY640 - 1 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 MSY492 - Jul 14, 02:25 UTCJul 14, 02:50 UTC25m
2026-07-14 MSY492 - Jul 14, 01:35 UTCJul 14, 01:50 UTC15m
2026-07-13 MSY632 - Jul 13, 21:20 UTCJul 13, 21:35 UTC15m
2026-07-13 MSY518 - Jul 13, 01:25 UTCJul 13, 01:40 UTC15m
2026-07-12 MSY632 - Jul 12, 01:35 UTCJul 12, 02:30 UTC55m
2026-07-11 MSY652 - Jul 11, 23:00 UTCJul 12, 00:10 UTC1h 10m
2026-07-11 MSY517 - Jul 11, 03:40 UTCJul 11, 04:40 UTC1h 0m
2026-07-11 MSY642 - Jul 11, 00:35 UTCJul 11, 01:00 UTC25m
2026-07-10 MSY632 - Jul 10, 22:50 UTCJul 10, 23:35 UTC45m
2026-07-07 MSY642 PMR → PMR Jul 7, 20:55 UTCJul 7, 22:00 UTC1h 5m
2026-07-07 MSY643 - Jul 7, 02:15 UTCJul 7, 02:25 UTC10m
2026-07-06 MSY647 - Jul 6, 04:40 UTCJul 6, 05:00 UTC20m
2026-07-06 MSY647 - Jul 6, 03:25 UTCJul 6, 03:50 UTC25m
2026-07-04 MSY518 - Jul 4, 02:45 UTCJul 4, 03:55 UTC1h 10m
2026-07-04 MSY281 - Jul 4, 01:15 UTCJul 4, 01:35 UTC20m
2026-07-03 MSY647 - Jul 3, 22:05 UTCJul 3, 23:20 UTC1h 15m
2026-07-03 MSY637 - Jul 3, 01:05 UTCJul 3, 01:30 UTC25m
2026-07-02 MSY511 - Jul 2, 22:25 UTCJul 2, 23:05 UTC40m
2026-07-02 MSY484 - Jul 2, 02:55 UTCJul 2, 04:00 UTC1h 5m
2026-07-01 MSY640 - Jul 1, 23:10 UTCJul 2, 00:05 UTC55m
2026-07-01 MSY89 - Jul 1, 03:45 UTCJul 1, 05:20 UTC1h 35m
2026-07-01 MSY641 PMR → PMR Jul 1, 01:40 UTCJul 1, 02:45 UTC1h 5m
2026-06-30 MSY622 PMR → PMR Jun 30, 23:55 UTCJul 1, 00:35 UTC40m
2026-06-30 MSY488 - Jun 30, 03:35 UTCJun 30, 05:05 UTC1h 30m
2026-06-30 MSY488 - Jun 30, 01:00 UTCJun 30, 02:15 UTC1h 16m
2026-06-29 MSY27 - Jun 29, 03:49 UTCJun 29, 04:09 UTC20m
2026-06-29 MSY27 - Jun 29, 02:54 UTCJun 29, 03:05 UTC10m
2026-06-28 MSY633 - Jun 28, 03:29 UTCJun 28, 03:40 UTC10m
2026-06-28 MSY633 - Jun 28, 01:50 UTCJun 28, 02:54 UTC1h 5m
2026-06-27 MSY286 - Jun 27, 23:39 UTCJun 28, 00:55 UTC1h 15m
2026-06-23 MSY641 - Jun 23, 23:10 UTCJun 23, 23:19 UTC10m
2026-06-23 MSY620 - Jun 23, 21:45 UTCJun 23, 22:19 UTC35m
2026-06-23 MSY465 - Jun 23, 04:19 UTCJun 23, 04:29 UTC10m
2026-06-22 MSY69 - Jun 22, 00:40 UTCJun 22, 02:00 UTC1h 20m
2026-06-21 MSY124 - Jun 21, 21:34 UTCJun 21, 22:00 UTC25m
2026-06-19 MSY483 - Jun 19, 01:34 UTCJun 19, 01:50 UTC15m
2026-06-18 MSY630 - Jun 18, 22:55 UTCJun 18, 23:10 UTC15m
2026-06-18 MSY642 PMR → PMR Jun 18, 01:35 UTCJun 18, 02:20 UTC45m
2026-06-18 MSY462 PMR → PMR Jun 18, 00:00 UTCJun 18, 00:20 UTC20m
2026-06-16 MSY643 - Jun 16, 22:30 UTCJun 16, 22:40 UTC10m
2026-06-13 MSY207 - Jun 13, 02:35 UTCJun 13, 03:00 UTC25m
2026-06-13 MSY207 - Jun 13, 01:05 UTCJun 13, 01:25 UTC20m
2026-06-12 MSY635 PMR → PMR Jun 12, 21:40 UTCJun 12, 22:35 UTC55m
2026-06-12 MSY485 - Jun 12, 04:15 UTCJun 12, 04:30 UTC15m
2026-06-12 MSY485 - Jun 12, 02:55 UTCJun 12, 03:20 UTC25m
2026-06-12 MSY469 - Jun 12, 00:25 UTCJun 12, 00:35 UTC11m
2026-06-11 MSY469 - Jun 11, 21:40 UTCJun 11, 23:50 UTC2h 10m
2026-06-11 MSY652 - Jun 11, 03:00 UTCJun 11, 04:10 UTC1h 10m
2026-06-11 MSY633 - Jun 11, 01:10 UTCJun 11, 01:30 UTC20m
2026-06-10 MSY648 - Jun 10, 22:55 UTCJun 10, 23:35 UTC40m

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

Mode-S C81CE7 frequently asked

What is Mode-S code C81CE7?
C81CE7 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-MTJ.
Where is Mode-S C81CE7 registered?
Mode-S code C81CE7 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 C81CE7 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81CE7, octal 62016347, decimal 13,114,599.
What flights does C81CE7 operate?
Mode-S C81CE7 has broadcast 20 distinct callsigns, including MSY647, MSY642, MSY633, MSY632, MSY652.