Apparatus

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sensors Mode-S transponder

C81443

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-TAP · CESSNA 172 Skyhawk

Hex
C81443
Octal
62012103
Decimal
13,112,387
Country
NZ
Tail
ZK-TAP
Type
C172
No current signal · last broadcast 2d ago
Flights observed
148
Distinct callsigns
1
Country
NZ
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S C81443.

Country allocation

The ICAO 24-bit address C81443 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
ZKTAP - 148 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 ZKTAP - Jul 12, 03:40 UTCJul 12, 04:01 UTC20m
2026-07-12 ZKTAP - Jul 12, 02:05 UTCJul 12, 02:55 UTC50m
2026-07-11 ZKTAP - Jul 11, 03:50 UTCJul 11, 04:55 UTC1h 5m
2026-07-11 ZKTAP - Jul 11, 00:10 UTCJul 11, 00:55 UTC45m
2026-07-09 ZKTAP - Jul 9, 00:10 UTCJul 9, 00:25 UTC15m
2026-07-08 ZKTAP - Jul 8, 20:50 UTCJul 8, 23:15 UTC2h 25m
2026-07-08 ZKTAP - Jul 8, 06:20 UTCJul 8, 07:55 UTC1h 35m
2026-07-08 ZKTAP - Jul 8, 04:00 UTCJul 8, 04:40 UTC40m
2026-07-08 ZKTAP - Jul 8, 01:50 UTCJul 8, 02:50 UTC1h 0m
2026-07-07 ZKTAP AMZ → AMZ Jul 7, 23:45 UTCJul 8, 00:35 UTC50m
2026-07-07 ZKTAP - Jul 7, 21:35 UTCJul 7, 22:50 UTC1h 15m
2026-07-05 ZKTAP - Jul 5, 00:10 UTCJul 5, 00:40 UTC30m
2026-07-04 ZKTAP - Jul 4, 02:00 UTCJul 4, 02:35 UTC35m
2026-07-03 ZKTAP - Jul 3, 21:05 UTCJul 3, 21:40 UTC35m
2026-07-03 ZKTAP - Jul 3, 04:10 UTCJul 3, 05:00 UTC50m
2026-07-02 ZKTAP - Jul 2, 01:40 UTCJul 2, 02:05 UTC25m
2026-07-01 ZKTAP - Jul 1, 23:45 UTCJul 2, 00:45 UTC1h 0m
2026-07-01 ZKTAP AMZ → AMZ Jul 1, 21:25 UTCJul 1, 22:30 UTC1h 5m
2026-07-01 ZKTAP - Jul 1, 05:55 UTCJul 1, 06:40 UTC45m
2026-07-01 ZKTAP - Jul 1, 03:55 UTCJul 1, 04:20 UTC25m
2026-07-01 ZKTAP - Jul 1, 01:30 UTCJul 1, 02:10 UTC40m
2026-06-30 ZKTAP - Jun 30, 23:30 UTCJul 1, 00:50 UTC1h 20m
2026-06-30 ZKTAP - Jun 30, 21:50 UTCJun 30, 22:45 UTC55m
2026-06-30 ZKTAP - Jun 30, 20:50 UTCJun 30, 21:05 UTC15m
2026-06-30 ZKTAP - Jun 30, 06:10 UTCJun 30, 07:00 UTC50m
2026-06-30 ZKTAP - Jun 30, 03:40 UTCJun 30, 04:10 UTC30m
2026-06-30 ZKTAP - Jun 30, 01:35 UTCJun 30, 02:40 UTC1h 5m
2026-06-29 ZKTAP - Jun 29, 22:05 UTCJun 30, 01:04 UTC3h 0m
2026-06-29 ZKTAP - Jun 29, 20:19 UTCJun 29, 21:05 UTC45m
2026-06-29 ZKTAP AMZ → AMZ Jun 29, 05:50 UTCJun 29, 06:05 UTC15m
2026-06-29 ZKTAP - Jun 29, 01:39 UTCJun 29, 02:30 UTC50m
2026-06-28 ZKTAP - Jun 28, 23:44 UTCJun 29, 00:29 UTC45m
2026-06-28 ZKTAP - Jun 28, 22:04 UTCJun 28, 23:04 UTC1h 0m
2026-06-28 ZKTAP AMZ → AMZ Jun 28, 01:50 UTCJun 28, 03:29 UTC1h 40m
2026-06-27 ZKTAP AMZ → AMZ Jun 27, 23:25 UTCJun 28, 00:45 UTC1h 20m
2026-06-27 ZKTAP - Jun 27, 21:29 UTCJun 27, 21:59 UTC30m
2026-06-27 ZKTAP - Jun 27, 03:40 UTCJun 27, 04:34 UTC55m
2026-06-19 ZKTAP - Jun 19, 21:39 UTCJun 19, 22:55 UTC1h 15m
2026-06-19 ZKTAP AMZ → AMZ Jun 19, 19:49 UTCJun 19, 20:40 UTC50m
2026-06-19 ZKTAP AMZ → AMZ Jun 19, 05:59 UTCJun 19, 07:59 UTC2h 0m
2026-06-19 ZKTAP - Jun 19, 04:04 UTCJun 19, 04:54 UTC50m
2026-06-19 ZKTAP - Jun 19, 01:54 UTCJun 19, 02:09 UTC15m
2026-06-19 ZKTAP - Jun 19, 00:14 UTCJun 19, 00:55 UTC40m
2026-06-18 ZKTAP - Jun 18, 00:40 UTCJun 18, 00:55 UTC15m
2026-06-17 ZKTAP - Jun 17, 23:30 UTCJun 17, 23:50 UTC20m
2026-06-14 ZKTAP - Jun 14, 01:05 UTCJun 14, 01:40 UTC35m
2026-06-13 ZKTAP - Jun 13, 23:00 UTCJun 13, 23:25 UTC25m
2026-06-13 ZKTAP - Jun 13, 22:05 UTCJun 13, 22:20 UTC15m
2026-06-13 ZKTAP - Jun 13, 01:10 UTCJun 13, 03:25 UTC2h 15m
2026-06-13 ZKTAP - Jun 13, 00:20 UTCJun 13, 00:30 UTC10m

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

Mode-S C81443 frequently asked

What is Mode-S code C81443?
C81443 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-TAP.
Where is Mode-S C81443 registered?
Mode-S code C81443 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 C81443 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C81443, octal 62012103, decimal 13,112,387.
What flights does C81443 operate?
Mode-S C81443 has broadcast 1 distinct callsign, including ZKTAP.