Apparatus

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sensors Mode-S transponder

C813B2

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-TAU · CESSNA 172 Skyhawk

Hex
C813B2
Octal
62011662
Decimal
13,112,242
Country
NZ
Tail
ZK-TAU
Type
C172
No current signal · last broadcast Jul 24, 04:20 UTC
Flights observed
174
Distinct callsigns
1
Country
NZ
Last broadcast
Jul 24, 04:20 UTC

Last known position

Most recent position reported by Mode-S C813B2.

Country allocation

The ICAO 24-bit address C813B2 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
ZKTAU - 174 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 ZKTAU AMZ → AMZ Jul 24, 03:25 UTCJul 24, 04:20 UTC55m
2026-07-17 ZKTAU - Jul 17, 21:44 UTCJul 17, 23:25 UTC1h 40m
2026-07-15 ZKTAU - Jul 15, 07:05 UTCJul 15, 07:20 UTC15m
2026-07-10 ZKTAU - Jul 10, 22:50 UTCJul 11, 00:15 UTC1h 25m
2026-07-08 ZKTAU - Jul 8, 21:35 UTCJul 8, 21:50 UTC15m
2026-07-08 ZKTAU - Jul 8, 04:05 UTCJul 8, 04:50 UTC45m
2026-07-08 ZKTAU - Jul 8, 02:15 UTCJul 8, 02:55 UTC40m
2026-07-08 ZKTAU - Jul 8, 01:05 UTCJul 8, 01:25 UTC20m
2026-07-05 ZKTAU - Jul 5, 00:10 UTCJul 5, 00:25 UTC15m
2026-07-04 ZKTAU - Jul 4, 21:45 UTCJul 4, 22:20 UTC35m
2026-07-04 ZKTAU - Jul 4, 01:20 UTCJul 4, 04:05 UTC2h 45m
2026-07-03 ZKTAU - Jul 3, 23:55 UTCJul 4, 00:40 UTC45m
2026-07-03 ZKTAU AMZ → AMZ Jul 3, 22:00 UTCJul 3, 22:30 UTC30m
2026-07-03 ZKTAU - Jul 3, 20:00 UTCJul 3, 20:50 UTC50m
2026-07-03 ZKTAU - Jul 3, 03:30 UTCJul 3, 04:50 UTC1h 20m
2026-07-03 ZKTAU - Jul 3, 01:35 UTCJul 3, 02:45 UTC1h 10m
2026-07-02 ZKTAU - Jul 2, 23:55 UTCJul 3, 00:35 UTC40m
2026-07-02 ZKTAU - Jul 2, 21:50 UTCJul 2, 22:55 UTC1h 5m
2026-07-02 ZKTAU - Jul 2, 20:10 UTCJul 2, 20:50 UTC40m
2026-07-02 ZKTAU - Jul 2, 06:00 UTCJul 2, 07:25 UTC1h 25m
2026-07-02 ZKTAU - Jul 2, 04:15 UTCJul 2, 04:45 UTC30m
2026-07-02 ZKTAU - Jul 2, 02:05 UTCJul 2, 02:40 UTC35m
2026-07-02 ZKTAU - Jul 2, 00:10 UTCJul 2, 00:40 UTC30m
2026-07-01 ZKTAU - Jul 1, 21:45 UTCJul 1, 22:50 UTC1h 5m
2026-07-01 ZKTAU AMZ → AMZ Jul 1, 03:25 UTCJul 1, 04:20 UTC55m
2026-07-01 ZKTAU - Jul 1, 01:30 UTCJul 1, 02:40 UTC1h 10m
2026-06-30 ZKTAU AMZ → AMZ Jun 30, 23:50 UTCJul 1, 00:20 UTC30m
2026-06-30 ZKTAU - Jun 30, 21:50 UTCJun 30, 22:45 UTC55m
2026-06-30 ZKTAU - Jun 30, 06:15 UTCJun 30, 07:00 UTC45m
2026-06-30 ZKTAU - Jun 30, 04:45 UTCJun 30, 05:05 UTC20m
2026-06-30 ZKTAU - Jun 30, 01:50 UTCJun 30, 02:30 UTC40m
2026-06-30 ZKTAU - Jun 30, 00:00 UTCJun 30, 00:39 UTC40m
2026-06-29 ZKTAU - Jun 29, 21:44 UTCJun 29, 22:10 UTC25m
2026-06-28 ZKTAU - Jun 28, 23:34 UTCJun 29, 00:24 UTC50m
2026-06-28 ZKTAU AMZ → AMZ Jun 28, 22:39 UTCJun 28, 22:49 UTC10m
2026-06-28 ZKTAU AMZ → AMZ Jun 28, 01:25 UTCJun 28, 02:25 UTC1h 0m
2026-06-27 ZKTAU - Jun 27, 23:50 UTCJun 28, 00:50 UTC1h 0m
2026-06-27 ZKTAU AMZ → AMZ Jun 27, 21:50 UTCJun 27, 23:04 UTC1h 15m
2026-06-14 ZKTAU AMZ → AMZ Jun 14, 21:50 UTCJun 14, 22:05 UTC15m
2026-06-14 ZKTAU - Jun 14, 02:20 UTCJun 14, 02:45 UTC25m
2026-06-13 ZKTAU - Jun 13, 23:30 UTCJun 14, 00:00 UTC30m
2026-06-13 ZKTAU - Jun 13, 04:20 UTCJun 13, 04:50 UTC30m
2026-06-13 ZKTAU - Jun 13, 01:35 UTCJun 13, 02:20 UTC45m
2026-06-12 ZKTAU AMZ → AMZ Jun 12, 22:00 UTCJun 12, 22:45 UTC45m
2026-06-12 ZKTAU - Jun 12, 01:40 UTCJun 12, 02:00 UTC20m
2026-06-11 ZKTAU - Jun 11, 23:55 UTCJun 12, 00:25 UTC30m
2026-06-11 ZKTAU - Jun 11, 21:55 UTCJun 11, 22:55 UTC1h 0m
2026-06-11 ZKTAU - Jun 11, 19:55 UTCJun 11, 20:55 UTC1h 0m
2026-06-11 ZKTAU - Jun 11, 06:15 UTCJun 11, 07:55 UTC1h 40m
2026-06-11 ZKTAU - Jun 11, 01:40 UTCJun 11, 02:40 UTC1h 0m

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

Mode-S C813B2 frequently asked

What is Mode-S code C813B2?
C813B2 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-TAU.
Where is Mode-S C813B2 registered?
Mode-S code C813B2 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 C813B2 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 04:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C813B2, octal 62011662, decimal 13,112,242.
What flights does C813B2 operate?
Mode-S C813B2 has broadcast 1 distinct callsign, including ZKTAU.