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sensors Mode-S transponder

C81766

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-WKF · CESSNA 172 Skyhawk

Hex
C81766
Octal
62013546
Decimal
13,113,190
Country
NZ
Tail
ZK-WKF
Type
C172
No current signal · last broadcast Jul 22, 04:00 UTC
Flights observed
147
Distinct callsigns
1
Country
NZ
Last broadcast
Jul 22, 04:00 UTC

Last known position

Most recent position reported by Mode-S C81766.

Country allocation

The ICAO 24-bit address C81766 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
ZKWKF - 147 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 ZKWKF - Jul 22, 03:15 UTCJul 22, 04:00 UTC45m
2026-07-21 ZKWKF HLZ → HLZ Jul 21, 06:25 UTCJul 21, 07:25 UTC1h 0m
2026-07-21 ZKWKF - Jul 21, 05:25 UTCJul 21, 05:35 UTC10m
2026-07-20 ZKWKF HLZ → HLZ Jul 20, 23:20 UTCJul 20, 23:40 UTC20m
2026-07-20 ZKWKF - Jul 20, 22:15 UTCJul 20, 22:25 UTC10m
2026-07-20 ZKWKF - Jul 20, 00:15 UTCJul 20, 00:30 UTC15m
2026-07-19 ZKWKF HLZ → HLZ Jul 19, 22:35 UTCJul 19, 23:25 UTC50m
2026-07-19 ZKWKF - Jul 19, 20:30 UTCJul 19, 21:10 UTC40m
2026-07-19 ZKWKF - Jul 19, 03:40 UTCJul 19, 03:50 UTC10m
2026-07-19 ZKWKF - Jul 19, 01:45 UTCJul 19, 02:25 UTC40m
2026-07-18 ZKWKF - Jul 18, 21:05 UTCJul 18, 21:45 UTC40m
2026-07-18 ZKWKF - Jul 18, 02:19 UTCJul 18, 02:55 UTC36m
2026-07-18 ZKWKF - Jul 18, 00:15 UTCJul 18, 00:35 UTC20m
2026-07-17 ZKWKF - Jul 17, 23:25 UTCJul 17, 23:35 UTC10m
2026-07-17 ZKWKF - Jul 17, 20:55 UTCJul 17, 21:39 UTC45m
2026-07-17 ZKWKF - Jul 17, 06:54 UTCJul 17, 07:40 UTC45m
2026-07-17 ZKWKF - Jul 17, 03:34 UTCJul 17, 04:49 UTC1h 15m
2026-07-17 ZKWKF - Jul 17, 01:55 UTCJul 17, 02:50 UTC55m
2026-07-16 ZKWKF - Jul 16, 04:05 UTCJul 16, 05:25 UTC1h 20m
2026-07-16 ZKWKF HLZ → HLZ Jul 16, 01:30 UTCJul 16, 02:25 UTC55m
2026-07-15 ZKWKF HLZ → HLZ Jul 15, 23:35 UTCJul 16, 00:20 UTC45m
2026-07-14 ZKWKF - Jul 14, 05:05 UTCJul 14, 05:15 UTC10m
2026-07-14 ZKWKF - Jul 14, 02:45 UTCJul 14, 04:15 UTC1h 30m
2026-07-13 ZKWKF - Jul 13, 04:40 UTCJul 13, 05:05 UTC25m
2026-07-13 ZKWKF HLZ → HLZ Jul 13, 00:45 UTCJul 13, 01:15 UTC30m
2026-07-12 ZKWKF HLZ → HLZ Jul 12, 23:25 UTCJul 12, 23:55 UTC30m
2026-07-12 ZKWKF - Jul 12, 20:55 UTCJul 12, 21:55 UTC1h 0m
2026-07-12 ZKWKF - Jul 12, 02:30 UTCJul 12, 05:15 UTC2h 45m
2026-07-12 ZKWKF - Jul 12, 00:55 UTCJul 12, 01:50 UTC55m
2026-07-11 ZKWKF - Jul 11, 23:00 UTCJul 12, 00:01 UTC1h 0m
2026-07-11 ZKWKF - Jul 11, 04:45 UTCJul 11, 05:01 UTC15m
2026-07-11 ZKWKF - Jul 11, 02:45 UTCJul 11, 02:55 UTC10m
2026-07-11 ZKWKF - Jul 11, 00:35 UTCJul 11, 01:45 UTC1h 10m
2026-07-10 ZKWKF - Jul 10, 23:10 UTCJul 10, 23:40 UTC30m
2026-07-10 ZKWKF - Jul 10, 21:25 UTCJul 10, 21:55 UTC30m
2026-07-10 ZKWKF RAG → HLZ Jul 10, 03:40 UTCJul 10, 04:05 UTC25m
2026-07-10 ZKWKF - Jul 10, 02:35 UTCJul 10, 02:45 UTC10m
2026-07-10 ZKWKF - Jul 10, 00:50 UTCJul 10, 01:35 UTC45m
2026-07-09 ZKWKF - Jul 9, 22:35 UTCJul 10, 00:05 UTC1h 30m
2026-07-09 ZKWKF - Jul 9, 21:30 UTCJul 9, 21:55 UTC25m
2026-07-09 ZKWKF - Jul 9, 20:45 UTCJul 9, 21:25 UTC40m
2026-07-09 ZKWKF - Jul 9, 02:45 UTCJul 9, 05:05 UTC2h 20m
2026-07-08 ZKWKF - Jul 8, 22:55 UTCJul 8, 23:35 UTC40m
2026-07-08 ZKWKF - Jul 8, 20:50 UTCJul 8, 21:35 UTC45m
2026-07-08 ZKWKF - Jul 8, 06:05 UTCJul 8, 07:55 UTC1h 50m
2026-07-08 ZKWKF HLZ → HLZ Jul 8, 01:45 UTCJul 8, 03:00 UTC1h 15m
2026-07-07 ZKWKF - Jul 7, 22:30 UTCJul 8, 00:50 UTC2h 20m
2026-07-07 ZKWKF HLZ → HLZ Jul 7, 03:45 UTCJul 7, 04:55 UTC1h 10m
2026-07-07 ZKWKF - Jul 7, 01:45 UTCJul 7, 01:55 UTC10m
2026-07-06 ZKWKF - Jul 6, 20:20 UTCJul 6, 21:55 UTC1h 35m

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

Mode-S C81766 frequently asked

What is Mode-S code C81766?
C81766 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-WKF.
Where is Mode-S C81766 registered?
Mode-S code C81766 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 C81766 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 04:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81766, octal 62013546, decimal 13,113,190.
What flights does C81766 operate?
Mode-S C81766 has broadcast 1 distinct callsign, including ZKWKF.