Apparatus

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sensors Mode-S transponder

C815B3

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-HWQ · BELL 206 JetRanger

Hex
C815B3
Octal
62012663
Decimal
13,112,755
Country
NZ
Tail
ZK-HWQ
Type
B06
No current signal · last broadcast Jul 26, 00:15 UTC
Flights observed
43
Distinct callsigns
1
Country
NZ
Last broadcast
Jul 26, 00:15 UTC

Last known position

Most recent position reported by Mode-S C815B3.

Country allocation

The ICAO 24-bit address C815B3 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
ZKHWQ - 43 2026-07-25

Recent flights last 43

DateFlightRouteTakeoffLandingDuration
2026-07-25 ZKHWQ - Jul 25, 21:45 UTCJul 26, 00:15 UTC2h 30m
2026-07-25 ZKHWQ - Jul 25, 20:25 UTCJul 25, 20:55 UTC30m
2026-07-13 ZKHWQ - Jul 13, 20:20 UTCJul 13, 20:45 UTC25m
2026-07-09 ZKHWQ - Jul 9, 01:20 UTCJul 9, 01:30 UTC10m
2026-07-05 ZKHWQ - Jul 5, 21:05 UTCJul 5, 21:40 UTC35m
2026-07-01 ZKHWQ - Jul 1, 01:25 UTCJul 1, 01:50 UTC25m
2026-06-29 ZKHWQ - Jun 29, 00:20 UTCJun 29, 01:05 UTC45m
2026-06-25 ZKHWQ - Jun 25, 20:30 UTCJun 25, 21:15 UTC45m
2026-06-23 ZKHWQ - Jun 23, 20:24 UTCJun 23, 21:05 UTC40m
2026-06-22 ZKHWQ - Jun 22, 20:24 UTCJun 22, 21:05 UTC40m
2026-06-21 ZKHWQ - Jun 21, 20:24 UTCJun 21, 21:19 UTC55m
2026-06-19 ZKHWQ - Jun 19, 01:34 UTCJun 19, 03:05 UTC1h 30m
2026-06-11 ZKHWQ - Jun 11, 02:15 UTCJun 11, 04:25 UTC2h 10m
2026-06-10 ZKHWQ - Jun 10, 00:50 UTCJun 10, 01:55 UTC1h 5m
2026-06-09 ZKHWQ - Jun 9, 04:55 UTCJun 9, 05:05 UTC10m
2026-06-09 ZKHWQ - Jun 9, 02:20 UTCJun 9, 02:40 UTC20m
2026-05-28 ZKHWQ - May 28, 22:55 UTCMay 28, 23:05 UTC10m
2026-05-28 ZKHWQ - May 28, 21:20 UTCMay 28, 21:30 UTC10m
2026-05-27 ZKHWQ - May 27, 05:45 UTCMay 27, 05:59 UTC15m
2026-05-27 ZKHWQ - May 27, 04:09 UTCMay 27, 04:24 UTC15m
2026-05-27 ZKHWQ - May 27, 00:10 UTCMay 27, 00:19 UTC10m
2026-05-26 ZKHWQ - May 26, 22:29 UTCMay 26, 22:39 UTC10m
2026-05-22 ZKHWQ - May 22, 01:00 UTCMay 22, 02:30 UTC1h 30m
2026-05-21 ZKHWQ - May 21, 23:25 UTCMay 21, 23:35 UTC10m
2026-05-21 ZKHWQ - May 21, 21:05 UTCMay 21, 21:15 UTC10m
2026-05-20 ZKHWQ - May 20, 02:10 UTCMay 20, 02:25 UTC15m
2026-05-19 ZKHWQ - May 19, 23:20 UTCMay 19, 23:35 UTC15m
2026-05-15 ZKHWQ - May 15, 01:50 UTCMay 15, 03:10 UTC1h 20m
2026-05-13 ZKHWQ - May 13, 20:45 UTCMay 14, 02:05 UTC5h 20m
2026-05-12 ZKHWQ - May 12, 22:05 UTCMay 13, 00:50 UTC2h 45m
2026-05-11 ZKHWQ - May 11, 01:55 UTCMay 11, 02:50 UTC55m
2026-05-03 ZKHWQ - May 3, 23:00 UTCMay 3, 23:10 UTC10m
2026-04-28 ZKHWQ - Apr 28, 23:10 UTCApr 28, 23:20 UTC10m
2026-04-28 ZKHWQ - Apr 28, 20:00 UTCApr 28, 20:15 UTC15m
2026-04-23 ZKHWQ - Apr 23, 23:35 UTCApr 23, 23:55 UTC20m
2026-04-22 ZKHWQ - Apr 22, 22:10 UTCApr 22, 22:25 UTC15m
2026-04-22 ZKHWQ - Apr 22, 00:50 UTCApr 22, 01:00 UTC10m
2026-04-17 ZKHWQ - Apr 17, 00:30 UTCApr 17, 00:44 UTC15m
2026-04-16 ZKHWQ - Apr 16, 22:00 UTCApr 16, 22:10 UTC10m
2026-04-13 ZKHWQ - Apr 13, 23:10 UTCApr 13, 23:35 UTC25m
2026-04-13 ZKHWQ - Apr 13, 21:00 UTCApr 13, 22:35 UTC1h 35m
2026-04-13 ZKHWQ - Apr 13, 03:55 UTCApr 13, 04:30 UTC35m
2026-04-13 ZKHWQ - Apr 13, 02:20 UTCApr 13, 04:00 UTC1h 40m

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

Mode-S C815B3 frequently asked

What is Mode-S code C815B3?
C815B3 is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-HWQ.
Where is Mode-S C815B3 registered?
Mode-S code C815B3 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 C815B3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 00:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C815B3, octal 62012663, decimal 13,112,755.
What flights does C815B3 operate?
Mode-S C815B3 has broadcast 1 distinct callsign, including ZKHWQ.