Apparatus

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sensors Mode-S transponder

C0639B

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GLSS · DIAMOND DA-42 Guardian · operated by THE CONFEDERATION COLLEGE OF APPLIED ARTS AND TECHNOLOGY

Hex
C0639B
Octal
60061633
Decimal
12,608,411
Country
CA
Tail
C-GLSS
Type
DA42
No current signal · last broadcast 2d ago
Flights observed
135
Distinct callsigns
1
Country
CA
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S C0639B.

Country allocation

The ICAO 24-bit address C0639B 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
CGLSS - 135 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 CGLSS YQT → YQT Jul 11, 14:05 UTCJul 11, 14:45 UTC40m
2026-07-11 CGLSS - Jul 11, 12:00 UTCJul 11, 13:05 UTC1h 5m
2026-07-10 CGLSS - Jul 10, 22:40 UTCJul 10, 23:40 UTC1h 0m
2026-07-10 CGLSS - Jul 10, 21:00 UTCJul 10, 21:30 UTC30m
2026-07-10 CGLSS - Jul 10, 18:45 UTCJul 10, 19:45 UTC1h 0m
2026-07-10 CGLSS YQT → YQT Jul 10, 17:00 UTCJul 10, 17:55 UTC55m
2026-07-10 CGLSS YQT → YQT Jul 10, 15:00 UTCJul 10, 15:50 UTC50m
2026-07-10 CGLSS - Jul 10, 12:15 UTCJul 10, 13:55 UTC1h 40m
2026-07-09 CGLSS YQT → YQT Jul 9, 22:30 UTCJul 9, 23:25 UTC55m
2026-07-09 CGLSS - Jul 9, 20:00 UTCJul 9, 21:25 UTC1h 25m
2026-07-09 CGLSS - Jul 9, 16:30 UTCJul 9, 16:40 UTC10m
2026-07-09 CGLSS - Jul 9, 12:05 UTCJul 9, 12:30 UTC25m
2026-07-08 CGLSS - Jul 8, 23:35 UTCJul 8, 23:50 UTC15m
2026-07-08 CGLSS - Jul 8, 22:35 UTCJul 8, 22:55 UTC20m
2026-07-08 CGLSS - Jul 8, 19:40 UTCJul 8, 21:00 UTC1h 20m
2026-07-08 CGLSS YQT → YQT Jul 8, 17:10 UTCJul 8, 18:15 UTC1h 5m
2026-07-08 CGLSS - Jul 8, 14:50 UTCJul 8, 16:00 UTC1h 10m
2026-07-08 CGLSS - Jul 8, 12:15 UTCJul 8, 13:00 UTC45m
2026-07-07 CGLSS - Jul 7, 19:05 UTCJul 7, 20:00 UTC55m
2026-07-07 CGLSS - Jul 7, 16:30 UTCJul 7, 16:45 UTC15m
2026-07-07 CGLSS - Jul 7, 12:25 UTCJul 7, 12:45 UTC20m
2026-07-06 CGLSS - Jul 6, 21:10 UTCJul 6, 22:05 UTC55m
2026-07-06 CGLSS YQT → YQT Jul 6, 19:10 UTCJul 6, 20:00 UTC50m
2026-07-06 CGLSS - Jul 6, 17:20 UTCJul 6, 18:10 UTC50m
2026-07-06 CGLSS - Jul 6, 16:05 UTCJul 6, 16:15 UTC10m
2026-07-06 CGLSS - Jul 6, 11:50 UTCJul 6, 12:05 UTC15m
2026-07-05 CGLSS - Jul 5, 20:40 UTCJul 5, 21:50 UTC1h 10m
2026-07-05 CGLSS YQT → YQT Jul 5, 18:50 UTCJul 5, 19:55 UTC1h 5m
2026-07-05 CGLSS YQT → YQT Jul 5, 16:30 UTCJul 5, 17:35 UTC1h 5m
2026-07-05 CGLSS - Jul 5, 14:30 UTCJul 5, 15:35 UTC1h 5m
2026-07-05 CGLSS YQT → YQT Jul 5, 11:40 UTCJul 5, 13:30 UTC1h 50m
2026-07-04 CGLSS - Jul 4, 20:45 UTCJul 4, 21:50 UTC1h 5m
2026-07-04 CGLSS YQT → YQT Jul 4, 18:45 UTCJul 4, 19:45 UTC1h 0m
2026-07-04 CGLSS - Jul 4, 16:45 UTCJul 4, 17:35 UTC50m
2026-07-04 CGLSS YQT → YQT Jul 4, 15:05 UTCJul 4, 15:55 UTC50m
2026-07-04 CGLSS YQT → YQT Jul 4, 13:40 UTCJul 4, 14:15 UTC35m
2026-07-04 CGLSS YQT → YQT Jul 4, 11:50 UTCJul 4, 12:45 UTC55m
2026-07-03 CGLSS - Jul 3, 23:00 UTCJul 3, 23:35 UTC35m
2026-07-03 CGLSS - Jul 3, 19:05 UTCJul 3, 20:00 UTC55m
2026-07-03 CGLSS - Jul 3, 16:25 UTCJul 3, 17:40 UTC1h 15m
2026-07-03 CGLSS YQT → YQT Jul 3, 14:10 UTCJul 3, 15:25 UTC1h 15m
2026-07-03 CGLSS - Jul 3, 12:15 UTCJul 3, 13:10 UTC55m
2026-07-02 CGLSS - Jul 2, 17:50 UTCJul 2, 18:50 UTC1h 0m
2026-07-02 CGLSS - Jul 2, 16:00 UTCJul 2, 16:45 UTC45m
2026-07-02 CGLSS YQT → YQT Jul 2, 14:00 UTCJul 2, 14:45 UTC45m
2026-06-26 CGLSS YQT → YQT Jun 26, 22:10 UTCJun 26, 23:09 UTC1h 0m
2026-06-26 CGLSS - Jun 26, 19:55 UTCJun 26, 20:55 UTC1h 0m
2026-06-26 CGLSS - Jun 26, 17:54 UTCJun 26, 18:15 UTC20m
2026-06-26 CGLSS - Jun 26, 16:44 UTCJun 26, 17:19 UTC35m
2026-06-26 CGLSS YQT → YQT Jun 26, 14:59 UTCJun 26, 16:00 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 C-GLSS page for operator, model, and routing details .

Mode-S C0639B frequently asked

What is Mode-S code C0639B?
C0639B is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GLSS.
Where is Mode-S C0639B registered?
Mode-S code C0639B is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C0639B broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C0639B, octal 60061633, decimal 12,608,411.
What flights does C0639B operate?
Mode-S C0639B has broadcast 1 distinct callsign, including CGLSS.