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sensors Mode-S transponder

C066DD

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GMYU · AIRBUS A220-300 · operated by Air Canada

Hex
C066DD
Octal
60063335
Decimal
12,609,245
Country
CA
Tail
C-GMYU
Type
BCS3
Broadcasting now · callsign ACA327 · 35,975 ft
Flights observed
471
Distinct callsigns
20
Country
CA
Last broadcast
Jul 26, 21:15 UTC

Current position

C066DD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C066DD 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 20 distinct

Callsign Airline Flights Last seen
ACA556 - 8 2026-06-27
ACA331 Air Canada 8 2026-07-24
ACA758 Air Canada 7 2026-07-23
ACA694 - 7 2026-06-21
ACA575 - 7 2026-06-27
ACA298 - 7 2026-07-23
ACA657 - 6 2026-07-17
ACA562 Air Canada 6 2026-07-23
ACA559 - 6 2026-06-28
ACA419 - 6 2026-06-19
ACA297 Air Canada 6 2026-05-23
ACA295 - 6 2026-07-23
ACA1222 - 6 2026-06-30
ACA1041 Air Canada 6 2026-07-02
ACA753 Air Canada 5 2026-07-19
ACA750 Air Canada 5 2026-07-19
ACA687 - 5 2026-06-22
ACA336 Air Canada 5 2026-07-24
ACA313 - 5 2026-07-14
ACA259 Air Canada 5 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ACA1075 YUL → DEN Jul 26, 20:45 UTCJul 26, 21:15 UTC30m
2026-07-26 ACA512 SEA → YUL Jul 26, 14:20 UTCJul 26, 19:14 UTC4h 54m
2026-07-26 ACA512 SEA → YUL Jul 26, 14:20 UTCJul 26, 17:15 UTC2h 55m
2026-07-25 ACA513 YYZ → MSP Jul 25, 23:10 UTCJul 26, 04:20 UTC5h 10m
2026-07-25 ACA733 LGA → YUL Jul 25, 20:40 UTCJul 25, 21:40 UTC1h 0m
2026-07-25 ACA732 YYZ → PHL Jul 25, 17:55 UTCJul 25, 18:55 UTC1h 0m
2026-07-25 ACA731 LGA → YUL Jul 25, 15:17 UTCJul 25, 16:03 UTC46m
2026-07-25 ACA731 LGA → YUL Jul 25, 15:20 UTCJul 25, 16:15 UTC55m
2026-07-25 ACA728 YYZ → LGA Jul 25, 12:40 UTCJul 25, 13:50 UTC1h 10m
2026-07-24 ACA336 YEG → YUL Jul 24, 20:00 UTCJul 24, 23:35 UTC3h 35m
2026-07-24 ACA336 YEG → YUL Jul 24, 19:57 UTCJul 24, 23:16 UTC3h 19m
2026-07-24 ACA331 YUL → YEG Jul 24, 13:10 UTCJul 24, 17:20 UTC4h 10m
2026-07-24 ACA328 YYC → YUL Jul 24, 07:45 UTCJul 24, 11:20 UTC3h 35m
2026-07-24 ACA327 YUL → YYC Jul 24, 02:05 UTCJul 24, 06:25 UTC4h 20m
2026-07-23 ACA758 SFO → YUL Jul 23, 19:35 UTCJul 24, 00:15 UTC4h 40m
2026-07-23 ACA758 SFO → YUL Jul 23, 19:34 UTCJul 24, 00:15 UTC4h 41m
2026-07-23 ACA562 YVR → SFO Jul 23, 16:15 UTCJul 23, 18:20 UTC2h 5m
2026-07-23 ACA295 YWG → YVR Jul 23, 11:05 UTCJul 23, 14:00 UTC2h 55m
2026-07-23 ACA298 - Jul 23, 05:50 UTCJul 23, 08:05 UTC2h 15m
2026-07-23 ACA298 YVR → YWG Jul 23, 05:46 UTCJul 23, 07:58 UTC2h 12m
2026-07-22 ACA315 YUL → YVR Jul 22, 23:10 UTCJul 23, 04:15 UTC5h 5m
2026-07-22 ACA1070 DFW → YUL Jul 22, 18:00 UTCJul 22, 21:05 UTC3h 5m
2026-07-21 ACA1071 YUL → DFW Jul 21, 23:24 UTCJul 22, 02:37 UTC3h 13m
2026-07-21 ACA1071 YUL → DFW Jul 21, 23:25 UTCJul 22, 02:45 UTC3h 20m
2026-07-21 ACA1070 DFW → YUL Jul 21, 17:35 UTCJul 21, 21:05 UTC3h 30m
2026-07-20 ACA1071 - Jul 20, 22:55 UTCJul 21, 02:10 UTC3h 14m
2026-07-20 ACA1559 EWR → YUL Jul 20, 19:55 UTCJul 20, 21:10 UTC1h 15m
2026-07-20 ACA1556 YUL → EWR Jul 20, 17:25 UTCJul 20, 18:30 UTC1h 5m
2026-07-20 ACA1205 - Jul 20, 12:25 UTCJul 20, 15:25 UTC3h 0m
2026-07-19 ACA1208 - Jul 19, 23:10 UTCJul 20, 02:20 UTC3h 10m
2026-07-19 ACA753 EWR → YYZ Jul 19, 20:30 UTCJul 19, 21:20 UTC50m
2026-07-19 ACA750 YUL → BOS Jul 19, 17:55 UTCJul 19, 18:40 UTC45m
2026-07-19 ACA1205 MPB → YUL Jul 19, 11:30 UTCJul 19, 14:35 UTC3h 5m
2026-07-19 ACA1208 - Jul 19, 00:10 UTCJul 19, 03:40 UTC3h 30m
2026-07-18 ACA1074 DEN → YUL Jul 18, 17:55 UTCJul 18, 21:20 UTC3h 25m
2026-07-18 ACA1073 YUL → DEN Jul 18, 12:35 UTCJul 18, 16:20 UTC3h 45m
2026-07-18 ACA1073 YUL → DEN Jul 18, 12:35 UTCJul 18, 16:11 UTC3h 36m
2026-07-17 ACA336 - Jul 17, 20:15 UTCJul 17, 21:15 UTC1h 0m
2026-07-17 ACA336 YEG → YUL Jul 17, 20:12 UTCJul 17, 23:36 UTC3h 24m
2026-07-17 ACA331 YUL → YEG Jul 17, 14:35 UTCJul 17, 19:00 UTC4h 25m
2026-07-17 ACA331 YUL → YEG Jul 17, 14:31 UTCJul 17, 18:48 UTC4h 17m
2026-07-17 ACA657 - Jul 17, 10:05 UTCJul 17, 11:10 UTC1h 5m
2026-07-17 ACA656 - Jul 17, 03:14 UTCJul 17, 04:04 UTC50m
2026-07-16 ACA758 - Jul 16, 20:19 UTCJul 17, 01:09 UTC4h 50m
2026-07-16 ACA562 - Jul 16, 16:00 UTCJul 16, 18:10 UTC2h 10m
2026-07-16 ACA1101 - Jul 16, 11:20 UTCJul 16, 13:25 UTC2h 5m
2026-07-16 ACA1104 - Jul 16, 04:45 UTCJul 16, 06:15 UTC1h 30m
2026-07-16 ACA1583 - Jul 16, 00:30 UTCJul 16, 02:50 UTC2h 20m
2026-07-16 ACA1583 SAN → YVR Jul 16, 00:28 UTCJul 16, 02:59 UTC2h 31m
2026-07-15 ACA1582 YVR → SAN Jul 15, 20:30 UTCJul 15, 23:15 UTC2h 45m

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

Mode-S C066DD frequently asked

What is Mode-S code C066DD?
C066DD is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GMYU.
Where is Mode-S C066DD registered?
Mode-S code C066DD is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C066DD broadcasting right now?
Yes. Mode-S C066DD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C066DD, octal 60063335, decimal 12,609,245.
What flights does C066DD operate?
Mode-S C066DD has broadcast 20 distinct callsigns, including ACA556, ACA331, ACA758, ACA694, ACA575.