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sensors Mode-S transponder

C81BFF

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-JTC · PIPER PA-38 Tomahawk

Hex
C81BFF
Octal
62015777
Decimal
13,114,367
Country
NZ
Tail
ZK-JTC
Type
PA38
No current signal · last broadcast Jul 26, 01:35 UTC
Flights observed
148
Distinct callsigns
1
Country
NZ
Last broadcast
Jul 26, 01:35 UTC

Last known position

Most recent position reported by Mode-S C81BFF.

Country allocation

The ICAO 24-bit address C81BFF 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
ZKJTC - 148 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ZKJTC - Jul 26, 01:15 UTCJul 26, 01:35 UTC20m
2026-07-25 ZKJTC - Jul 25, 23:10 UTCJul 25, 23:30 UTC20m
2026-07-25 ZKJTC - Jul 25, 21:05 UTCJul 25, 21:55 UTC50m
2026-07-24 ZKJTC - Jul 24, 04:05 UTCJul 24, 04:45 UTC40m
2026-07-22 ZKJTC - Jul 22, 04:00 UTCJul 22, 04:50 UTC50m
2026-07-21 ZKJTC - Jul 21, 21:40 UTCJul 21, 22:45 UTC1h 5m
2026-07-19 ZKJTC - Jul 19, 02:20 UTCJul 19, 02:45 UTC25m
2026-07-18 ZKJTC - Jul 18, 23:10 UTCJul 19, 00:25 UTC1h 15m
2026-07-18 ZKJTC - Jul 18, 20:55 UTCJul 18, 21:25 UTC30m
2026-07-17 ZKJTC - Jul 17, 22:55 UTCJul 17, 23:30 UTC35m
2026-06-18 ZKJTC - Jun 18, 04:20 UTCJun 18, 04:45 UTC25m
2026-06-18 ZKJTC - Jun 18, 01:10 UTCJun 18, 01:50 UTC40m
2026-06-17 ZKJTC - Jun 17, 04:25 UTCJun 17, 04:50 UTC25m
2026-06-16 ZKJTC - Jun 16, 22:50 UTCJun 16, 23:20 UTC30m
2026-06-14 ZKJTC - Jun 14, 22:35 UTCJun 14, 23:15 UTC39m
2026-06-14 ZKJTC - Jun 14, 04:25 UTCJun 14, 04:50 UTC25m
2026-06-14 ZKJTC - Jun 14, 02:40 UTCJun 14, 03:25 UTC45m
2026-06-13 ZKJTC - Jun 13, 22:50 UTCJun 13, 23:20 UTC30m
2026-06-13 ZKJTC - Jun 13, 21:25 UTCJun 13, 22:00 UTC35m
2026-06-13 ZKJTC - Jun 13, 04:15 UTCJun 13, 04:50 UTC35m
2026-06-13 ZKJTC - Jun 13, 01:15 UTCJun 13, 01:50 UTC35m
2026-06-12 ZKJTC - Jun 12, 23:20 UTCJun 12, 23:50 UTC30m
2026-06-12 ZKJTC - Jun 12, 20:50 UTCJun 12, 21:55 UTC1h 5m
2026-06-12 ZKJTC - Jun 12, 04:25 UTCJun 12, 04:55 UTC30m
2026-06-12 ZKJTC - Jun 12, 02:30 UTCJun 12, 03:05 UTC35m
2026-06-12 ZKJTC - Jun 12, 00:20 UTCJun 12, 00:55 UTC35m
2026-06-11 ZKJTC - Jun 11, 22:45 UTCJun 11, 23:20 UTC35m
2026-06-11 ZKJTC - Jun 11, 03:25 UTCJun 11, 04:50 UTC1h 25m
2026-06-11 ZKJTC - Jun 11, 00:50 UTCJun 11, 01:40 UTC50m
2026-06-10 ZKJTC - Jun 10, 23:20 UTCJun 10, 23:55 UTC35m
2026-06-10 ZKJTC - Jun 10, 03:40 UTCJun 10, 04:05 UTC25m
2026-06-09 ZKJTC - Jun 9, 23:00 UTCJun 9, 23:35 UTC35m
2026-06-09 ZKJTC - Jun 9, 21:05 UTCJun 9, 21:40 UTC35m
2026-06-08 ZKJTC - Jun 8, 21:20 UTCJun 8, 21:35 UTC15m
2026-06-08 ZKJTC - Jun 8, 01:15 UTCJun 8, 01:40 UTC25m
2026-06-07 ZKJTC - Jun 7, 22:05 UTCJun 7, 22:30 UTC25m
2026-06-07 ZKJTC - Jun 7, 02:19 UTCJun 7, 03:00 UTC40m
2026-06-07 ZKJTC - Jun 7, 01:09 UTCJun 7, 01:35 UTC25m
2026-06-06 ZKJTC - Jun 6, 21:15 UTCJun 6, 22:44 UTC1h 30m
2026-06-06 ZKJTC - Jun 6, 00:55 UTCJun 6, 01:25 UTC30m
2026-06-05 ZKJTC - Jun 5, 22:35 UTCJun 5, 23:35 UTC1h 0m
2026-06-05 ZKJTC - Jun 5, 21:25 UTCJun 5, 22:00 UTC35m
2026-06-05 ZKJTC - Jun 5, 04:10 UTCJun 5, 04:45 UTC35m
2026-06-05 ZKJTC - Jun 5, 02:55 UTCJun 5, 03:35 UTC40m
2026-06-03 ZKJTC - Jun 3, 00:40 UTCJun 3, 01:50 UTC1h 10m
2026-06-02 ZKJTC - Jun 2, 20:45 UTCJun 2, 20:55 UTC10m
2026-06-01 ZKJTC - Jun 1, 00:45 UTCJun 1, 01:15 UTC30m
2026-05-31 ZKJTC - May 31, 21:20 UTCMay 31, 21:45 UTC25m
2026-05-31 ZKJTC - May 31, 00:55 UTCMay 31, 01:11 UTC16m
2026-05-30 ZKJTC - May 30, 22:55 UTCMay 30, 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-JTC page for operator, model, and routing details .

Mode-S C81BFF frequently asked

What is Mode-S code C81BFF?
C81BFF is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-JTC.
Where is Mode-S C81BFF registered?
Mode-S code C81BFF 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 C81BFF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 01:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81BFF, octal 62015777, decimal 13,114,367.
What flights does C81BFF operate?
Mode-S C81BFF has broadcast 1 distinct callsign, including ZKJTC.