sensors Mode-S transponder

C81CE3

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-MTY · PIPER PA-23-250 Aztec

Hex
C81CE3
Octal
62016343
Decimal
13,114,595
Country
NZ
Tail
ZK-MTY
Type
PA27
No current signal · last broadcast 6h ago
Flights observed
47
Distinct callsigns
4
Country
NZ
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S C81CE3.

Country allocation

The ICAO 24-bit address C81CE3 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 4 distinct

Callsign Airline Flights Last seen
SAV12Y - 22 2026-07-14
SAV11Y - 12 2026-06-04
SAV13Y - 7 2026-06-08
SAV19Y - 6 2026-05-04

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-07-14 SAV12Y - Jul 14, 04:20 UTCJul 14, 04:45 UTC25m
2026-07-14 SAV12Y - Jul 14, 02:50 UTCJul 14, 03:25 UTC35m
2026-07-14 SAV12Y - Jul 14, 01:45 UTCJul 14, 02:15 UTC30m
2026-07-14 SAV12Y - Jul 14, 00:10 UTCJul 14, 01:10 UTC1h 0m
2026-06-16 SAV12Y - Jun 16, 03:39 UTCJun 16, 04:55 UTC1h 15m
2026-06-16 SAV12Y - Jun 16, 02:54 UTCJun 16, 03:05 UTC10m
2026-06-15 SAV12Y - Jun 15, 20:50 UTCJun 15, 22:10 UTC1h 20m
2026-06-15 SAV12Y - Jun 15, 00:24 UTCJun 15, 01:15 UTC50m
2026-06-08 SAV13Y - Jun 8, 21:45 UTCJun 8, 22:35 UTC50m
2026-06-08 SAV13Y - Jun 8, 20:40 UTCJun 8, 20:55 UTC15m
2026-06-08 SAV13Y - Jun 8, 20:10 UTCJun 8, 20:30 UTC20m
2026-06-07 SAV13Y - Jun 7, 20:30 UTCJun 7, 20:45 UTC15m
2026-06-07 SAV13Y - Jun 7, 19:40 UTCJun 7, 19:55 UTC15m
2026-06-04 SAV11Y - Jun 4, 05:05 UTCJun 4, 05:20 UTC15m
2026-06-04 SAV11Y - Jun 4, 03:35 UTCJun 4, 03:55 UTC20m
2026-05-13 SAV11Y - May 13, 01:50 UTCMay 13, 02:20 UTC30m
2026-05-12 SAV11Y - May 12, 19:45 UTCMay 12, 22:01 UTC2h 15m
2026-05-10 SAV11Y - May 10, 20:35 UTCMay 10, 21:10 UTC35m
2026-05-10 SAV11Y - May 10, 19:30 UTCMay 10, 19:54 UTC25m
2026-05-08 SAV11Y - May 8, 02:09 UTCMay 8, 02:49 UTC40m
2026-05-08 SAV11Y - May 8, 00:34 UTCMay 8, 00:54 UTC20m
2026-05-07 SAV11Y - May 7, 21:30 UTCMay 7, 22:20 UTC50m
2026-05-07 SAV13Y - May 7, 04:10 UTCMay 7, 04:30 UTC20m
2026-05-07 SAV13Y - May 7, 03:35 UTCMay 7, 04:00 UTC25m
2026-05-06 SAV12Y - May 6, 20:30 UTCMay 6, 20:50 UTC20m
2026-05-06 SAV12Y - May 6, 03:30 UTCMay 6, 03:45 UTC15m
2026-05-05 SAV12Y - May 5, 20:30 UTCMay 5, 20:50 UTC20m
2026-05-04 SAV19Y - May 4, 03:45 UTCMay 4, 04:05 UTC20m
2026-05-03 SAV19Y - May 3, 20:45 UTCMay 3, 21:05 UTC20m
2026-05-03 SAV19Y - May 3, 19:34 UTCMay 3, 20:25 UTC50m
2026-04-28 SAV19Y - Apr 28, 22:45 UTCApr 28, 22:55 UTC10m
2026-04-28 SAV19Y - Apr 28, 20:50 UTCApr 28, 21:15 UTC25m
2026-04-24 SAV12Y - Apr 24, 21:55 UTCApr 24, 22:25 UTC30m
2026-04-24 SAV12Y - Apr 24, 05:05 UTCApr 24, 07:15 UTC2h 10m
2026-04-23 SAV12Y - Apr 23, 22:20 UTCApr 23, 23:05 UTC45m
2026-04-23 SAV12Y - Apr 23, 20:35 UTCApr 23, 21:20 UTC45m
2026-04-22 SAV12Y - Apr 22, 01:20 UTCApr 22, 02:15 UTC55m
2026-04-22 SAV12Y - Apr 22, 00:00 UTCApr 22, 00:45 UTC45m
2026-04-21 SAV12Y - Apr 21, 22:35 UTCApr 21, 22:55 UTC20m
2026-04-20 SAV12Y - Apr 20, 03:45 UTCApr 20, 04:00 UTC15m
2026-04-20 SAV11Y - Apr 20, 02:00 UTCApr 20, 02:45 UTC45m
2026-04-19 SAV11Y - Apr 19, 22:30 UTCApr 19, 23:20 UTC50m
2026-04-15 SAV19Y - Apr 15, 03:30 UTCApr 15, 04:05 UTC35m
2026-04-13 SAV12Y - Apr 13, 21:55 UTCApr 13, 23:00 UTC1h 5m
2026-04-13 SAV12Y - Apr 13, 20:35 UTCApr 13, 20:45 UTC10m
2026-04-13 SAV12Y - Apr 13, 04:00 UTCApr 13, 04:15 UTC15m
2026-04-12 SAV11Y - Apr 12, 19:25 UTCApr 12, 19:40 UTC15m

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

Mode-S C81CE3 frequently asked

What is Mode-S code C81CE3?
C81CE3 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-MTY.
Where is Mode-S C81CE3 registered?
Mode-S code C81CE3 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 C81CE3 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81CE3, octal 62016343, decimal 13,114,595.
What flights does C81CE3 operate?
Mode-S C81CE3 has broadcast 4 distinct callsigns, including SAV12Y, SAV11Y, SAV13Y, SAV19Y.