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sensors Mode-S transponder

C811DE

ICAO 24-bit transponder address · allocated to New Zealand

Currently assigned to ZK-PDM · CESSNA 208 Caravan

Hex
C811DE
Octal
62010736
Decimal
13,111,774
Country
NZ
Tail
ZK-PDM
Type
C208
No current signal · last broadcast Jul 26, 21:10 UTC
Flights observed
501
Distinct callsigns
20
Country
NZ
Last broadcast
Jul 26, 21:10 UTC

Last known position

Most recent position reported by Mode-S C811DE.

Country allocation

The ICAO 24-bit address C811DE 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 20 distinct

Callsign Airline Flights Last seen
SDA349 Sounds Air 17 2026-07-24
SDA341 Sounds Air 17 2026-07-24
SDA347 Sounds Air 14 2026-07-24
SDA345 - 14 2026-07-12
SDA241 - 14 2026-07-15
SDA348 Sounds Air 13 2026-07-24
SDA281 - 13 2026-07-20
SDA350 Sounds Air 12 2026-07-24
SDA342 Sounds Air 12 2026-07-26
SDA343 Sounds Air 11 2026-07-26
SDA287 - 11 2026-07-21
SDA282 Sounds Air 11 2026-06-09
SDA280 - 11 2026-07-20
SDA271 Sounds Air 11 2026-07-20
SDA289 Sounds Air 10 2026-07-21
SDA285 Sounds Air 10 2026-06-09
SDA265 Sounds Air 10 2026-07-19
SDA261 Sounds Air 10 2026-07-19
SDA260 Sounds Air 10 2026-07-25
SDA123 Sounds Air 10 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SDA343 WLG → NSN Jul 26, 20:40 UTCJul 26, 21:10 UTC30m
2026-07-26 SDA342 NSN → WLG Jul 26, 18:00 UTCJul 26, 19:40 UTC1h 40m
2026-07-26 SDA360 NSN → WLG Jul 26, 07:30 UTCJul 26, 08:00 UTC30m
2026-07-26 SDA359 WLG → NSN Jul 26, 06:20 UTCJul 26, 06:55 UTC36m
2026-07-26 SDA357 WLG → NSN Jul 26, 03:35 UTCJul 26, 05:10 UTC1h 35m
2026-07-25 SDA354 NSN → WLG Jul 25, 23:50 UTCJul 26, 00:30 UTC40m
2026-07-25 SDA353 WLG → NSN Jul 25, 22:40 UTCJul 25, 23:15 UTC35m
2026-07-25 SDA352 NSN → WLG Jul 25, 21:15 UTCJul 25, 21:45 UTC30m
2026-07-25 SDA351 WLG → NSN Jul 25, 20:05 UTCJul 25, 20:40 UTC35m
2026-07-25 SDA260 BHE → WLG Jul 25, 06:20 UTCJul 25, 06:45 UTC25m
2026-07-24 SDA253 WLG → BHE Jul 24, 21:25 UTCJul 24, 21:45 UTC20m
2026-07-24 SDA341 WLG → NSN Jul 24, 19:05 UTCJul 24, 20:35 UTC1h 30m
2026-07-24 SDA350 NSN → WLG Jul 24, 08:10 UTCJul 24, 08:40 UTC30m
2026-07-24 SDA349 WLG → NSN Jul 24, 06:55 UTCJul 24, 07:35 UTC40m
2026-07-24 SDA348 NSN → WLG Jul 24, 05:45 UTCJul 24, 06:10 UTC25m
2026-07-24 SDA347 WLG → NSN Jul 24, 04:25 UTCJul 24, 05:10 UTC45m
2026-07-24 SDA124 BHE → WLG Jul 24, 03:10 UTCJul 24, 03:35 UTC25m
2026-07-24 SDA123 WLG → BHE Jul 24, 02:10 UTCJul 24, 02:35 UTC25m
2026-07-23 SDA357 WLG → NSN Jul 23, 22:15 UTCJul 24, 00:00 UTC1h 45m
2026-07-23 SDA250 - Jul 23, 19:00 UTCJul 23, 19:25 UTC25m
2026-07-21 SDA289 WLG → BHE Jul 21, 07:30 UTCJul 21, 07:50 UTC20m
2026-07-21 SDA288 BHE → WLG Jul 21, 06:25 UTCJul 21, 06:45 UTC20m
2026-07-21 SDA287 - Jul 21, 05:10 UTCJul 21, 05:30 UTC20m
2026-07-21 SDA286 - Jul 21, 04:30 UTCJul 21, 04:50 UTC20m
2026-07-20 SDA283 WLG → BHE Jul 20, 23:05 UTCJul 20, 23:25 UTC20m
2026-07-20 SDA344 - Jul 20, 21:50 UTCJul 20, 22:20 UTC30m
2026-07-20 SDA343 - Jul 20, 20:40 UTCJul 20, 21:10 UTC30m
2026-07-20 SDA281 - Jul 20, 18:50 UTCJul 20, 19:50 UTC1h 0m
2026-07-20 SDA280 - Jul 20, 18:05 UTCJul 20, 18:25 UTC20m
2026-07-20 SDA271 WLG → BHE Jul 20, 07:30 UTCJul 20, 07:50 UTC20m
2026-07-20 SDA270 BHE → WLG Jul 20, 06:25 UTCJul 20, 06:45 UTC20m
2026-07-20 SDA269 WLG → BHE Jul 20, 05:10 UTCJul 20, 05:30 UTC20m
2026-07-20 SDA267 WLG → BHE Jul 20, 03:50 UTCJul 20, 04:50 UTC1h 0m
2026-07-20 SDA266 BHE → WLG Jul 20, 02:55 UTCJul 20, 03:45 UTC50m
2026-07-20 SDA413 - Jul 20, 01:20 UTCJul 20, 01:40 UTC20m
2026-07-20 SDA412 - Jul 20, 00:10 UTCJul 20, 00:30 UTC20m
2026-07-19 SDA265 WLG → BHE Jul 19, 22:35 UTCJul 19, 22:55 UTC20m
2026-07-19 SDA264 - Jul 19, 21:15 UTCJul 19, 22:15 UTC1h 0m
2026-07-19 SDA262 BHE → WLG Jul 19, 20:15 UTCJul 19, 20:40 UTC25m
2026-07-19 SDA261 WLG → BHE Jul 19, 19:10 UTCJul 19, 19:30 UTC20m
2026-07-19 SDA260 - Jul 19, 18:25 UTCJul 19, 19:05 UTC40m
2026-07-18 SDA217 WLG → BHE Jul 18, 07:05 UTCJul 18, 07:30 UTC25m
2026-07-18 SDA347 WLG → WLG Jul 18, 04:50 UTCJul 18, 06:25 UTC1h 35m
2026-07-18 SDA346 NSN → WLG Jul 18, 02:19 UTCJul 18, 03:55 UTC1h 36m
2026-07-18 SDA214 BHE → WLG Jul 18, 01:10 UTCJul 18, 01:25 UTC15m
2026-07-17 SDA213 WLG → BHE Jul 17, 23:55 UTCJul 18, 00:15 UTC20m
2026-07-17 SDA318 NSN → WLG Jul 17, 23:05 UTCJul 17, 23:30 UTC25m
2026-07-17 SDA317 - Jul 17, 21:44 UTCJul 17, 22:20 UTC35m
2026-07-17 SDA212 - Jul 17, 19:49 UTCJul 17, 20:50 UTC1h 0m
2026-07-17 SDA270 - Jul 17, 19:05 UTCJul 17, 19:25 UTC20m

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

Mode-S C811DE frequently asked

What is Mode-S code C811DE?
C811DE is an ICAO 24-bit transponder address. Allocated to New Zealand. Assigned to ZK-PDM.
Where is Mode-S C811DE registered?
Mode-S code C811DE 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 C811DE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C811DE, octal 62010736, decimal 13,111,774.
What flights does C811DE operate?
Mode-S C811DE has broadcast 20 distinct callsigns, including SDA349, SDA341, SDA347, SDA345, SDA241.