Apparatus

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sensors Mode-S transponder

C803AE

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-DXO · CESSNA 172 Skyhawk

Hex
C803AE
Octal
62001656
Decimal
13,108,142
Country
NZ
Tail
ZK-DXO
Type
C172
No current signal · last broadcast 15d ago
Flights observed
111
Distinct callsigns
3
Country
NZ
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S C803AE.

Country allocation

The ICAO 24-bit address C803AE 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 3 distinct

Callsign Airline Flights Last seen
ZKDXO - 100 2026-07-04
SAV19O - 8 2026-07-02
SAV12O - 3 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 ZKDXO TRG → TRG Jul 4, 00:30 UTCJul 4, 01:10 UTC40m
2026-07-02 ZKDXO - Jul 2, 23:30 UTCJul 3, 00:15 UTC45m
2026-07-02 SAV19O - Jul 2, 20:40 UTCJul 2, 21:30 UTC50m
2026-06-30 ZKDXO - Jun 30, 21:05 UTCJun 30, 21:20 UTC15m
2026-06-27 ZKDXO - Jun 27, 22:49 UTCJun 27, 23:04 UTC15m
2026-06-27 ZKDXO - Jun 27, 21:50 UTCJun 27, 21:59 UTC10m
2026-06-27 ZKDXO - Jun 27, 03:44 UTCJun 27, 04:05 UTC20m
2026-06-27 ZKDXO - Jun 27, 02:39 UTCJun 27, 02:55 UTC15m
2026-06-23 ZKDXO - Jun 23, 02:24 UTCJun 23, 02:40 UTC15m
2026-06-22 ZKDXO - Jun 22, 20:44 UTCJun 22, 21:05 UTC20m
2026-06-22 ZKDXO - Jun 22, 04:09 UTCJun 22, 04:30 UTC20m
2026-06-22 ZKDXO - Jun 22, 02:59 UTCJun 22, 03:14 UTC15m
2026-06-19 ZKDXO - Jun 19, 22:04 UTCJun 19, 22:24 UTC20m
2026-06-19 ZKDXO - Jun 19, 20:55 UTCJun 19, 21:14 UTC20m
2026-06-18 ZKDXO - Jun 18, 23:25 UTCJun 18, 23:40 UTC15m
2026-06-18 ZKDXO - Jun 18, 20:40 UTCJun 18, 20:55 UTC15m
2026-06-17 ZKDXO - Jun 17, 21:50 UTCJun 17, 22:10 UTC20m
2026-06-17 ZKDXO - Jun 17, 20:45 UTCJun 17, 20:55 UTC10m
2026-06-17 ZKDXO - Jun 17, 04:10 UTCJun 17, 04:30 UTC20m
2026-06-17 ZKDXO - Jun 17, 03:00 UTCJun 17, 03:15 UTC15m
2026-06-16 ZKDXO - Jun 16, 04:00 UTCJun 16, 04:20 UTC20m
2026-06-16 ZKDXO - Jun 16, 02:15 UTCJun 16, 03:15 UTC1h 0m
2026-06-15 ZKDXO - Jun 15, 20:34 UTCJun 15, 20:50 UTC15m
2026-06-14 ZKDXO - Jun 14, 21:50 UTCJun 14, 22:10 UTC20m
2026-06-14 ZKDXO - Jun 14, 20:30 UTCJun 14, 20:50 UTC20m
2026-06-14 ZKDXO - Jun 14, 04:00 UTCJun 14, 04:15 UTC15m
2026-06-14 ZKDXO - Jun 14, 02:55 UTCJun 14, 03:05 UTC10m
2026-06-13 ZKDXO - Jun 13, 22:35 UTCJun 14, 01:00 UTC2h 25m
2026-06-13 ZKDXO - Jun 13, 21:40 UTCJun 13, 21:55 UTC15m
2026-06-12 ZKDXO - Jun 12, 23:40 UTCJun 13, 00:00 UTC20m
2026-06-12 ZKDXO - Jun 12, 22:35 UTCJun 12, 22:50 UTC15m
2026-06-11 ZKDXO - Jun 11, 22:00 UTCJun 11, 22:20 UTC20m
2026-06-11 ZKDXO - Jun 11, 20:35 UTCJun 11, 20:50 UTC15m
2026-06-11 ZKDXO - Jun 11, 04:15 UTCJun 11, 04:30 UTC15m
2026-06-11 ZKDXO - Jun 11, 03:20 UTCJun 11, 03:35 UTC15m
2026-06-11 ZKDXO - Jun 11, 02:10 UTCJun 11, 02:25 UTC15m
2026-06-11 ZKDXO - Jun 11, 01:00 UTCJun 11, 01:15 UTC15m
2026-06-10 ZKDXO - Jun 10, 03:55 UTCJun 10, 04:15 UTC20m
2026-06-09 ZKDXO - Jun 9, 23:25 UTCJun 9, 23:40 UTC15m
2026-06-09 ZKDXO - Jun 9, 01:10 UTCJun 9, 01:30 UTC20m
2026-06-08 ZKDXO - Jun 8, 20:55 UTCJun 8, 21:05 UTC10m
2026-06-08 ZKDXO - Jun 8, 04:35 UTCJun 8, 05:00 UTC25m
2026-06-08 ZKDXO - Jun 8, 03:30 UTCJun 8, 03:45 UTC15m
2026-06-08 ZKDXO - Jun 8, 01:55 UTCJun 8, 02:50 UTC55m
2026-06-08 ZKDXO - Jun 8, 00:00 UTCJun 8, 00:25 UTC25m
2026-06-07 ZKDXO - Jun 7, 23:00 UTCJun 7, 23:20 UTC20m
2026-06-07 ZKDXO - Jun 7, 21:45 UTCJun 7, 22:10 UTC25m
2026-06-07 ZKDXO - Jun 7, 20:45 UTCJun 7, 21:00 UTC15m
2026-06-07 ZKDXO - Jun 7, 04:25 UTCJun 7, 04:50 UTC25m
2026-06-07 ZKDXO - Jun 7, 03:10 UTCJun 7, 03:25 UTC15m

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

Mode-S C803AE frequently asked

What is Mode-S code C803AE?
C803AE is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-DXO.
Where is Mode-S C803AE registered?
Mode-S code C803AE 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 C803AE broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C803AE, octal 62001656, decimal 13,108,142.
What flights does C803AE operate?
Mode-S C803AE has broadcast 3 distinct callsigns, including ZKDXO, SAV19O, SAV12O.