Apparatus

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sensors Mode-S transponder

C03A20

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FWAH · DE HAVILLAND DHC-6 Twin Otter · operated by Air Tindi Ltd.

Hex
C03A20
Octal
60035040
Decimal
12,597,792
Country
CA
Tail
C-FWAH
Type
DHC6
No current signal · last broadcast 1d ago
Flights observed
10
Distinct callsigns
1
Country
CA
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S C03A20.

Country allocation

The ICAO 24-bit address C03A20 falls within the block assigned to Canada (CA) by ICAO Annex 10, Volume III. Every aircraft registered in Canada 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
WAH - 10 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-13 WAH - Apr 13, 23:15 UTCApr 13, 23:35 UTC20m
2026-04-13 WAH ANC → ENA Apr 13, 22:00 UTCApr 13, 22:20 UTC20m
2026-04-13 WAH - Apr 13, 20:35 UTCApr 13, 20:50 UTC15m
2026-04-13 WAH - Apr 13, 19:50 UTCApr 13, 20:00 UTC10m
2026-04-13 WAH ENA → BVU Apr 13, 19:40 UTCApr 13, 20:00 UTC20m
2026-04-13 WAH - Apr 13, 18:00 UTCApr 13, 18:10 UTC10m
2026-04-13 WAH - Apr 13, 16:55 UTCApr 13, 17:50 UTC55m
2026-04-13 WAH - Apr 13, 16:20 UTCApr 13, 16:30 UTC10m
2026-04-13 WAH - Apr 13, 15:50 UTCApr 13, 16:05 UTC15m
2026-04-13 WAH ANC → ENA Apr 13, 15:05 UTCApr 13, 15:30 UTC25m

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 C-FWAH page for operator, model, and routing details .

Mode-S C03A20 frequently asked

What is Mode-S code C03A20?
C03A20 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FWAH.
Where is Mode-S C03A20 registered?
Mode-S code C03A20 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C03A20 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C03A20, octal 60035040, decimal 12,597,792.
What flights does C03A20 operate?
Mode-S C03A20 has broadcast 1 distinct callsign, including WAH.