Apparatus

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sensors Mode-S transponder

C07721

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-GTCY · AIRBUS A-321 · operated by Air Transat A T Inc.

Hex
C07721
Octal
60073441
Decimal
12,613,409
Country
CA
Tail
C-GTCY
Type
A321
No current signal · last broadcast 1h ago
Flights observed
126
Distinct callsigns
20
Country
CA
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S C07721.

Country allocation

The ICAO 24-bit address C07721 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
TSC539 - 14 2026-07-14
TSC538 - 12 2026-07-14
TSC326 Air Transat 12 2026-07-18
TSC327 Air Transat 10 2026-07-01
TSC845 Air Transat 5 2026-05-22
TSC844 Air Transat 5 2026-05-22
TSC823 Air Transat 5 2026-04-30
TSC711 - 4 2026-07-13
TSC450 Air Transat 4 2026-07-17
TSC651 Air Transat 3 2026-04-26
TSC650 Air Transat 3 2026-04-26
TSC197 - 3 2026-07-11
TSC822 Air Transat 2 2026-04-29
TSC751 Air Transat 2 2026-07-03
TSC720 - 2 2026-07-15
TSC653 Air Transat 2 2026-04-23
TSC652 Air Transat 2 2026-04-22
TSC621 Air Transat 2 2026-04-25
TSC620 Air Transat 2 2026-04-25
TSC601 - 2 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 TSC326 YYZ → CUN Jul 18, 11:20 UTCJul 18, 14:15 UTC2h 55m
2026-07-17 TSC450 YUL → YYZ Jul 17, 20:29 UTCJul 17, 21:20 UTC50m
2026-07-16 TSC9939 CUN → YUL Jul 16, 17:54 UTCJul 16, 21:50 UTC3h 55m
2026-07-16 TSC9938 YUL → CUN Jul 16, 12:25 UTCJul 16, 16:09 UTC3h 45m
2026-07-16 TSC41 YYZ → YUL Jul 16, 02:05 UTCJul 16, 03:00 UTC55m
2026-07-15 TSC187 YYZ → YYZ Jul 15, 14:45 UTCJul 16, 00:40 UTC9h 55m
2026-07-15 TSC720 YUL → YYZ Jul 15, 00:55 UTCJul 15, 01:50 UTC55m
2026-07-14 TSC539 CUN → YUL Jul 14, 16:50 UTCJul 14, 20:45 UTC3h 55m
2026-07-14 TSC538 YUL → CUN Jul 14, 11:20 UTCJul 14, 15:05 UTC3h 45m
2026-07-13 TSC711 YYZ → YUL Jul 13, 23:35 UTCJul 14, 00:35 UTC1h 0m
2026-07-13 TSC410 YUL → YYZ Jul 13, 20:35 UTCJul 13, 21:30 UTC55m
2026-07-12 TSC601 YUL → YUL Jul 12, 11:50 UTCJul 13, 00:15 UTC12h 25m
2026-07-11 TSC197 SJO → YUL Jul 11, 06:10 UTCJul 11, 11:25 UTC5h 15m
2026-07-10 TSC196 YUL → SJO Jul 10, 23:00 UTCJul 11, 04:15 UTC5h 15m
2026-07-10 TSC539 CUN → YUL Jul 10, 17:05 UTCJul 10, 21:10 UTC4h 5m
2026-07-10 TSC538 YUL → CUN Jul 10, 11:25 UTCJul 10, 15:25 UTC4h 0m
2026-07-10 TSC741 YYZ → YUL Jul 10, 00:50 UTCJul 10, 01:50 UTC1h 0m
2026-07-05 TSC470 YUL → YYZ Jul 5, 20:25 UTCJul 5, 21:20 UTC55m
2026-07-04 TSC539 CUN → YUL Jul 4, 17:10 UTCJul 4, 21:05 UTC3h 55m
2026-07-04 TSC538 YUL → CUN Jul 4, 11:40 UTCJul 4, 15:35 UTC3h 55m
2026-07-03 TSC751 YYZ → YUL Jul 3, 23:55 UTCJul 4, 00:45 UTC50m
2026-07-03 TSC450 YUL → YYZ Jul 3, 20:35 UTCJul 3, 21:30 UTC55m
2026-07-02 TSC539 CUN → YUL Jul 2, 16:55 UTCJul 2, 20:45 UTC3h 50m
2026-07-02 TSC538 YUL → CUN Jul 2, 11:25 UTCJul 2, 15:30 UTC4h 5m
2026-07-01 TSC531 YYZ → YUL Jul 1, 23:15 UTCJul 2, 00:25 UTC1h 10m
2026-07-01 TSC327 CUN → YYZ Jul 1, 16:35 UTCJul 1, 20:05 UTC3h 30m
2026-07-01 TSC326 YYZ → CUN Jul 1, 11:30 UTCJul 1, 14:55 UTC3h 25m
2026-07-01 TSC720 YYZ → MAN Jul 1, 02:25 UTCJul 1, 03:20 UTC55m
2026-06-27 TSC539 CUN → YUL Jun 27, 17:04 UTCJun 27, 21:04 UTC4h 0m
2026-06-27 TSC538 YUL → CUN Jun 27, 11:30 UTCJun 27, 15:30 UTC4h 0m
2026-06-22 TSC711 CDG → YUL Jun 22, 23:45 UTCJun 23, 00:35 UTC50m
2026-06-22 TSC327 CUN → YYZ Jun 22, 16:34 UTCJun 22, 20:00 UTC3h 25m
2026-06-22 TSC326 YYZ → CUN Jun 22, 11:19 UTCJun 22, 14:55 UTC3h 35m
2026-06-21 TSC470 YUL → YYZ Jun 21, 20:45 UTCJun 21, 21:39 UTC55m
2026-06-21 TSC73 YHZ → YUL Jun 21, 14:40 UTCJun 21, 15:05 UTC25m
2026-06-20 TSC895 PTP → YUL Jun 20, 11:25 UTCJun 20, 23:34 UTC12h 10m
2026-06-13 TSC539 CUN → YUL Jun 13, 11:20 UTCJun 13, 21:05 UTC9h 45m
2026-06-12 TSC751 YYZ → YUL Jun 12, 23:25 UTCJun 13, 00:15 UTC50m
2026-06-12 TSC450 YUL → YYZ Jun 12, 20:35 UTCJun 12, 21:30 UTC55m
2026-06-11 TSC539 CUN → YUL Jun 11, 11:25 UTCJun 11, 21:10 UTC9h 45m
2026-06-08 TSC711 CDG → YUL Jun 8, 23:30 UTCJun 9, 00:25 UTC55m
2026-06-08 TSC327 CUN → YYZ Jun 8, 16:20 UTCJun 8, 19:55 UTC3h 35m
2026-06-08 TSC326 YYZ → CUN Jun 8, 11:25 UTCJun 8, 14:55 UTC3h 30m
2026-06-07 TSC327 CUN → YYZ Jun 7, 16:40 UTCJun 7, 20:25 UTC3h 45m
2026-06-07 TSC326 YYZ → CUN Jun 7, 11:20 UTCJun 7, 14:40 UTC3h 20m
2026-06-06 TSC327 CUN → YYZ Jun 6, 16:45 UTCJun 6, 20:25 UTC3h 40m
2026-06-06 TSC326 YYZ → CUN Jun 6, 11:09 UTCJun 6, 14:34 UTC3h 25m
2026-06-03 TSC327 CUN → YYZ Jun 3, 17:20 UTCJun 3, 20:05 UTC2h 45m
2026-06-03 TSC326 YYZ → CUN Jun 3, 14:45 UTCJun 3, 14:55 UTC10m
2026-06-03 TSC326 YYZ → CUN Jun 3, 11:20 UTCJun 3, 13:55 UTC2h 35m

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

Mode-S C07721 frequently asked

What is Mode-S code C07721?
C07721 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-GTCY.
Where is Mode-S C07721 registered?
Mode-S code C07721 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C07721 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C07721, octal 60073441, decimal 12,613,409.
What flights does C07721 operate?
Mode-S C07721 has broadcast 20 distinct callsigns, including TSC539, TSC538, TSC326, TSC327, TSC845.