Apparatus

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sensors Mode-S transponder

C084B9

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GYGU · AIRBUS A-321 · operated by Air Canada

Hex
C084B9
Octal
60102271
Decimal
12,616,889
Country
CA
Tail
C-GYGU
Type
A321
No current signal · last broadcast Jul 1, 17:55 UTC
Flights observed
387
Distinct callsigns
20
Country
CA
Last broadcast
Jul 1, 17:55 UTC

Last known position

Most recent position reported by Mode-S C084B9.

Country allocation

The ICAO 24-bit address C084B9 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
ACA173 - 20 2026-06-25
ACA176 - 18 2026-06-26
ACA1043 Air Canada 15 2026-05-30
ACA168 Air Canada 12 2026-06-04
ACA167 Air Canada 12 2026-06-04
ACA1044 Air Canada 11 2026-05-30
ACA605 Air Canada 10 2026-04-28
ACA1237 Air Canada 9 2026-04-29
ACA1236 Air Canada 9 2026-04-29
ACA618 Air Canada 8 2026-05-17
ACA177 - 8 2026-06-29
ACA150 Air Canada 8 2026-06-29
ACA1200 Air Canada 8 2026-04-26
ACA769 - 7 2026-06-30
ACA767 - 7 2026-07-01
ACA766 - 7 2026-06-30
ACA764 Air Canada 7 2026-07-01
ACA725 Air Canada 7 2026-05-28
ACA718 Air Canada 7 2026-05-27
ACA601 Air Canada 7 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-01 ACA7110 YVR → YYC Jul 1, 15:30 UTCJul 1, 17:51 UTC2h 21m
2026-07-01 ACA7110 YVR → YYC Jul 1, 15:30 UTCJul 1, 17:55 UTC2h 25m
2026-07-01 ACA767 BOS → YYZ Jul 1, 10:15 UTCJul 1, 11:30 UTC1h 15m
2026-07-01 ACA764 YYZ → EWR Jul 1, 01:55 UTCJul 1, 03:00 UTC1h 5m
2026-06-30 ACA508 PWK → YYZ Jun 30, 22:15 UTCJun 30, 23:25 UTC1h 10m
2026-06-30 ACA508 ORD → YYZ Jun 30, 22:13 UTCJun 30, 23:10 UTC57m
2026-06-30 ACA509 YYZ → ORD Jun 30, 18:15 UTCJun 30, 19:23 UTC1h 8m
2026-06-30 ACA509 - Jun 30, 18:15 UTCJun 30, 19:25 UTC1h 10m
2026-06-30 ACA769 BOS → YYZ Jun 30, 14:55 UTCJun 30, 16:10 UTC1h 15m
2026-06-30 ACA766 YYZ → BOS Jun 30, 12:25 UTCJun 30, 13:25 UTC1h 0m
2026-06-30 ACA767 BOS → YYZ Jun 30, 09:20 UTCJun 30, 10:35 UTC1h 15m
2026-06-30 ACA764 YYZ → EWR Jun 30, 01:50 UTCJun 30, 02:50 UTC1h 0m
2026-06-29 ACA150 YYC → YYZ Jun 29, 19:54 UTCJun 29, 23:25 UTC3h 30m
2026-06-29 ACA150 YYC → YYZ Jun 29, 19:54 UTCJun 29, 23:14 UTC3h 20m
2026-06-29 ACA137 YYZ → YYC Jun 29, 14:44 UTCJun 29, 18:30 UTC3h 45m
2026-06-29 ACA178 - Jun 29, 08:35 UTCJun 29, 12:05 UTC3h 30m
2026-06-29 ACA177 - Jun 29, 03:25 UTCJun 29, 07:15 UTC3h 50m
2026-06-28 ACA773 EWR → YYZ Jun 28, 22:29 UTCJun 28, 23:44 UTC1h 15m
2026-06-28 ACA770 YYZ → EWR Jun 28, 20:50 UTCJun 28, 20:54 UTC5m
2026-06-28 ACA770 YYZ → EWR Jun 28, 19:34 UTCJun 28, 20:34 UTC1h 0m
2026-06-28 ACA770 YYZ → EWR Jun 28, 19:34 UTCJun 28, 20:54 UTC1h 20m
2026-06-28 ACA769 BOS → YYZ Jun 28, 15:24 UTCJun 28, 16:45 UTC1h 20m
2026-06-28 ACA766 YYZ → BOS Jun 28, 12:35 UTCJun 28, 13:55 UTC1h 20m
2026-06-28 ACA767 BNH → YYZ Jun 28, 09:20 UTCJun 28, 10:35 UTC1h 15m
2026-06-28 ACA764 YYZ → EWR Jun 28, 01:15 UTCJun 28, 02:20 UTC1h 5m
2026-06-27 ACA508 ORD → YYZ Jun 27, 21:29 UTCJun 27, 22:25 UTC55m
2026-06-27 ACA509 YYZ → ORD Jun 27, 18:15 UTCJun 27, 19:39 UTC1h 25m
2026-06-27 ACA407 YUL → YYZ Jun 27, 14:20 UTCJun 27, 15:19 UTC1h 0m
2026-06-27 ACA402 YYZ → YUL Jun 27, 12:15 UTCJun 27, 13:04 UTC50m
2026-06-27 ACA402 YYZ → YUL Jun 27, 12:12 UTCJun 27, 12:58 UTC46m
2026-06-27 ACA174 - Jun 27, 00:44 UTCJun 27, 03:55 UTC3h 10m
2026-06-26 ACA171 - Jun 26, 19:30 UTCJun 26, 23:19 UTC3h 50m
2026-06-26 ACA176 - Jun 26, 14:19 UTCJun 26, 16:14 UTC1h 55m
2026-06-26 ACA176 YEG → YYZ Jun 26, 14:14 UTCJun 26, 17:22 UTC3h 8m
2026-06-25 ACA173 - Jun 25, 21:44 UTCJun 26, 01:24 UTC3h 40m
2026-06-25 ACA769 BOS → YYZ Jun 25, 15:54 UTCJun 25, 17:14 UTC1h 20m
2026-06-25 ACA769 BOS → YYZ Jun 25, 15:53 UTCJun 25, 17:10 UTC1h 17m
2026-06-25 ACA766 YYZ → BOS Jun 25, 13:20 UTCJun 25, 14:24 UTC1h 5m
2026-06-25 ACA767 BOS → YYZ Jun 25, 09:34 UTCJun 25, 10:59 UTC1h 25m
2026-06-25 ACA764 YYZ → EWR Jun 25, 02:19 UTCJun 25, 03:24 UTC1h 5m
2026-06-24 ACA150 YYC → YYZ Jun 24, 20:24 UTCJun 24, 23:50 UTC3h 25m
2026-06-24 ACA137 YYZ → YYC Jun 24, 14:45 UTCJun 24, 18:20 UTC3h 35m
2026-06-24 ACA137 YYZ → YYC Jun 24, 14:41 UTCJun 24, 18:10 UTC3h 29m
2026-06-24 ACA767 BOS → YYZ Jun 24, 09:49 UTCJun 24, 11:05 UTC1h 15m
2026-06-24 ACA764 YYZ → EWR Jun 24, 01:55 UTCJun 24, 03:00 UTC1h 5m
2026-06-23 ACA773 EWR → YYZ Jun 23, 22:29 UTCJun 23, 23:50 UTC1h 20m
2026-06-23 ACA770 YYZ → EWR Jun 23, 19:31 UTCJun 23, 20:31 UTC1h 0m
2026-06-23 ACA770 YYZ → EWR Jun 23, 19:34 UTCJun 23, 20:40 UTC1h 5m
2026-06-23 ACA134 YYC → YYZ Jun 23, 13:29 UTCJun 23, 16:54 UTC3h 25m
2026-06-22 ACA325 YUL → YYC Jun 22, 23:35 UTCJun 23, 04:00 UTC4h 25m

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

Mode-S C084B9 frequently asked

What is Mode-S code C084B9?
C084B9 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GYGU.
Where is Mode-S C084B9 registered?
Mode-S code C084B9 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C084B9 broadcasting right now?
No active broadcast right now. Last signal was Jul 1, 17:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C084B9, octal 60102271, decimal 12,616,889.
What flights does C084B9 operate?
Mode-S C084B9 has broadcast 20 distinct callsigns, including ACA173, ACA176, ACA1043, ACA168, ACA167.