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sensors Mode-S transponder

C81975

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-XAT · CESSNA 172 Skyhawk

Hex
C81975
Octal
62014565
Decimal
13,113,717
Country
NZ
Tail
ZK-XAT
Type
C172
No current signal · last broadcast 5d ago
Flights observed
136
Distinct callsigns
1
Country
NZ
Last broadcast
5d ago

Last known position

Most recent position reported by Mode-S C81975.

Country allocation

The ICAO 24-bit address C81975 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
ZKXAT - 136 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 ZKXAT AMZ → AMZ Jul 9, 03:35 UTCJul 9, 03:45 UTC10m
2026-06-22 ZKXAT - Jun 22, 05:15 UTCJun 22, 08:15 UTC3h 0m
2026-06-22 ZKXAT - Jun 22, 03:30 UTCJun 22, 04:30 UTC1h 0m
2026-06-22 ZKXAT - Jun 22, 01:55 UTCJun 22, 02:54 UTC1h 0m
2026-06-21 ZKXAT - Jun 21, 23:30 UTCJun 22, 00:40 UTC1h 10m
2026-06-21 ZKXAT - Jun 21, 21:29 UTCJun 21, 22:40 UTC1h 10m
2026-06-20 ZKXAT - Jun 20, 03:34 UTCJun 20, 03:54 UTC20m
2026-06-20 ZKXAT - Jun 20, 01:09 UTCJun 20, 01:44 UTC35m
2026-06-19 ZKXAT - Jun 19, 22:34 UTCJun 19, 23:49 UTC1h 15m
2026-06-19 ZKXAT AMZ → AMZ Jun 19, 06:14 UTCJun 19, 07:59 UTC1h 45m
2026-06-19 ZKXAT - Jun 19, 03:44 UTCJun 19, 04:19 UTC35m
2026-06-19 ZKXAT - Jun 19, 02:04 UTCJun 19, 03:05 UTC1h 0m
2026-06-19 ZKXAT - Jun 19, 01:04 UTCJun 19, 01:24 UTC20m
2026-06-18 ZKXAT - Jun 18, 23:00 UTCJun 19, 00:14 UTC1h 14m
2026-06-18 ZKXAT - Jun 18, 01:40 UTCJun 18, 02:55 UTC1h 15m
2026-06-17 ZKXAT - Jun 17, 23:05 UTCJun 18, 00:20 UTC1h 15m
2026-06-17 ZKXAT - Jun 17, 06:30 UTCJun 17, 08:45 UTC2h 15m
2026-06-17 ZKXAT - Jun 17, 01:35 UTCJun 17, 02:55 UTC1h 20m
2026-06-16 ZKXAT - Jun 16, 23:20 UTCJun 17, 00:30 UTC1h 10m
2026-06-16 ZKXAT - Jun 16, 04:10 UTCJun 16, 05:30 UTC1h 20m
2026-06-15 ZKXAT AMZ → AMZ Jun 15, 01:15 UTCJun 15, 02:35 UTC1h 20m
2026-06-14 ZKXAT AMZ → AMZ Jun 14, 22:00 UTCJun 14, 22:55 UTC55m
2026-06-14 ZKXAT - Jun 14, 20:20 UTCJun 14, 20:30 UTC10m
2026-06-14 ZKXAT - Jun 14, 02:55 UTCJun 14, 03:45 UTC50m
2026-06-14 ZKXAT - Jun 14, 00:15 UTCJun 14, 00:50 UTC35m
2026-06-13 ZKXAT AMZ → AMZ Jun 13, 21:45 UTCJun 13, 23:10 UTC1h 25m
2026-06-13 ZKXAT - Jun 13, 00:05 UTCJun 13, 00:45 UTC40m
2026-06-12 ZKXAT - Jun 12, 22:00 UTCJun 12, 22:45 UTC45m
2026-06-12 ZKXAT - Jun 12, 03:25 UTCJun 12, 04:45 UTC1h 20m
2026-06-12 ZKXAT - Jun 12, 01:05 UTCJun 12, 02:20 UTC1h 15m
2026-06-11 ZKXAT - Jun 11, 22:10 UTCJun 11, 23:25 UTC1h 15m
2026-06-11 ZKXAT - Jun 11, 19:55 UTCJun 11, 20:40 UTC45m
2026-06-10 ZKXAT - Jun 10, 23:35 UTCJun 11, 00:55 UTC1h 20m
2026-06-09 ZKXAT - Jun 9, 20:35 UTCJun 9, 20:45 UTC10m
2026-06-08 ZKXAT - Jun 8, 21:45 UTCJun 8, 22:55 UTC1h 10m
2026-06-07 ZKXAT - Jun 7, 22:05 UTCJun 7, 23:40 UTC1h 35m
2026-06-07 ZKXAT - Jun 7, 19:45 UTCJun 7, 21:00 UTC1h 15m
2026-06-07 ZKXAT NPL → AMZ Jun 7, 03:55 UTCJun 7, 05:10 UTC1h 15m
2026-06-07 ZKXAT - Jun 7, 01:50 UTCJun 7, 03:20 UTC1h 30m
2026-06-07 ZKXAT - Jun 7, 00:25 UTCJun 7, 01:04 UTC40m
2026-06-06 ZKXAT - Jun 6, 21:30 UTCJun 6, 22:50 UTC1h 20m
2026-05-30 ZKXAT - May 30, 00:20 UTCMay 30, 02:06 UTC1h 46m
2026-05-29 ZKXAT AMZ → AMZ May 29, 21:50 UTCMay 29, 22:50 UTC1h 0m
2026-05-29 ZKXAT - May 29, 03:55 UTCMay 29, 04:50 UTC55m
2026-05-29 ZKXAT - May 29, 01:55 UTCMay 29, 02:55 UTC1h 0m
2026-05-28 ZKXAT - May 28, 23:30 UTCMay 29, 00:50 UTC1h 20m
2026-05-28 ZKXAT AMZ → AMZ May 28, 06:45 UTCMay 28, 07:45 UTC1h 0m
2026-05-28 ZKXAT - May 28, 03:05 UTCMay 28, 04:05 UTC1h 0m
2026-05-28 ZKXAT - May 28, 01:20 UTCMay 28, 02:30 UTC1h 10m
2026-05-27 ZKXAT - May 27, 04:39 UTCMay 27, 04:59 UTC20m

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

Mode-S C81975 frequently asked

What is Mode-S code C81975?
C81975 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-XAT.
Where is Mode-S C81975 registered?
Mode-S code C81975 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 C81975 broadcasting right now?
No active broadcast right now. Last signal was 5d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81975, octal 62014565, decimal 13,113,717.
What flights does C81975 operate?
Mode-S C81975 has broadcast 1 distinct callsign, including ZKXAT.