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
Broadcasting now · callsign TSC326 · 34,000 ft
Flights observed
76
Distinct callsigns
20
Country
CA
Last broadcast
2d ago

Current position

C07721 is currently broadcasting. Map zoomed to live position.

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 Air Transat 7 2026-05-31
TSC538 Air Transat 7 2026-05-30
TSC845 Air Transat 5 2026-05-22
TSC844 Air Transat 5 2026-05-22
TSC823 Air Transat 5 2026-04-30
TSC327 Air Transat 4 2026-05-27
TSC326 Air Transat 4 2026-05-27
TSC651 Air Transat 3 2026-04-26
TSC650 Air Transat 3 2026-04-26
TSC822 Air Transat 2 2026-04-29
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
TSC197 Air Transat 2 2026-05-19
TSC770 Air Transat 1 2026-06-01
TSC750 Air Transat 1 2026-05-09
TSC731 Air Transat 1 2026-05-27
TSC730 Air Transat 1 2026-05-14
TSC711 Air Transat 1 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-01 TSC770 YUL → YYZ Jun 1, 01:05 UTCJun 1, 02:00 UTC55m
2026-05-31 TSC539 CUN → YUL May 31, 11:30 UTCMay 31, 21:20 UTC9h 50m
2026-05-30 TSC539 CUN → YUL May 30, 17:40 UTCMay 30, 20:50 UTC3h 10m
2026-05-30 TSC538 YUL → CUN May 30, 11:20 UTCMay 30, 14:35 UTC3h 15m
2026-05-27 TSC731 YYZ → YUL May 27, 23:35 UTCMay 28, 00:20 UTC45m
2026-05-27 TSC327 CUN → YYZ May 27, 17:30 UTCMay 27, 20:05 UTC2h 35m
2026-05-27 TSC326 YYZ → CUN May 27, 11:25 UTCMay 27, 15:15 UTC3h 50m
2026-05-26 TSC420 YUL → YYZ May 26, 20:29 UTCMay 26, 21:25 UTC55m
2026-05-24 TSC539 CUN → YUL May 24, 17:05 UTCMay 24, 20:50 UTC3h 45m
2026-05-24 TSC538 YUL → CUN May 24, 11:30 UTCMay 24, 15:40 UTC4h 10m
2026-05-23 TSC539 CUN → YUL May 23, 17:00 UTCMay 23, 20:40 UTC3h 41m
2026-05-23 TSC538 YUL → CUN May 23, 11:15 UTCMay 23, 15:25 UTC4h 10m
2026-05-22 TSC845 POP → YYZ May 22, 15:45 UTCMay 22, 18:45 UTC3h 0m
2026-05-22 TSC844 YUL → FLL May 22, 11:05 UTCMay 22, 14:10 UTC3h 5m
2026-05-21 TSC539 CUN → YUL May 21, 16:55 UTCMay 21, 20:45 UTC3h 50m
2026-05-21 TSC538 YUL → CUN May 21, 11:10 UTCMay 21, 15:20 UTC4h 10m
2026-05-19 TSC197 GLA → YYZ May 19, 06:05 UTCMay 19, 11:20 UTC5h 15m
2026-05-18 TSC196 YYZ → GLA May 18, 23:00 UTCMay 19, 03:45 UTC4h 45m
2026-05-18 TSC539 CUN → YUL May 18, 17:00 UTCMay 18, 20:55 UTC3h 54m
2026-05-18 TSC538 YUL → CUN May 18, 11:05 UTCMay 18, 15:00 UTC3h 55m
2026-05-17 TSC601 NTE → YUL May 17, 11:50 UTCMay 18, 00:15 UTC12h 25m
2026-05-15 TSC551 YYZ → YUL May 15, 22:40 UTCMay 15, 23:35 UTC55m
2026-05-14 TSC730 YUL → YYZ May 14, 01:20 UTCMay 14, 02:15 UTC55m
2026-05-12 TSC197 GLA → YYZ May 12, 02:55 UTCMay 12, 11:05 UTC8h 10m
2026-05-11 TSC538 YUL → CUN May 11, 11:15 UTCMay 11, 20:35 UTC9h 21m
2026-05-10 TSC600 YUL → LIR May 10, 11:40 UTCMay 11, 00:00 UTC12h 20m
2026-05-09 TSC561 YYZ → YUL May 9, 22:15 UTCMay 9, 23:09 UTC55m
2026-05-09 TSC750 YUL → YYZ May 9, 01:05 UTCMay 9, 02:00 UTC55m
2026-05-05 TSC539 CUN → YUL May 5, 17:40 UTCMay 5, 21:05 UTC3h 25m
2026-05-05 TSC538 YUL → CUN May 5, 11:25 UTCMay 5, 14:30 UTC3h 5m
2026-05-04 TSC711 CDG → YUL May 4, 23:30 UTCMay 5, 00:20 UTC50m
2026-05-04 TSC327 CUN → YYZ May 4, 16:30 UTCMay 4, 20:05 UTC3h 36m
2026-05-04 TSC326 YYZ → CUN May 4, 11:20 UTCMay 4, 14:50 UTC3h 30m
2026-05-04 TSC427 BRU → YUL May 4, 03:45 UTCMay 4, 07:10 UTC3h 25m
2026-05-03 TSC426 YUL → BRU May 3, 22:34 UTCMay 4, 02:19 UTC3h 45m
2026-05-03 TSC327 CUN → YYZ May 3, 17:05 UTCMay 3, 20:45 UTC3h 40m
2026-05-03 TSC326 YYZ → CUN May 3, 11:20 UTCMay 3, 15:15 UTC3h 55m
2026-05-02 TSC327 CUN → YYZ May 2, 16:40 UTCMay 2, 20:05 UTC3h 25m
2026-05-02 TSC326 YYZ → CUN May 2, 11:10 UTCMay 2, 15:05 UTC3h 55m
2026-05-01 TSC450 YUL → YYZ May 1, 20:20 UTCMay 1, 21:15 UTC55m
2026-04-30 TSC845 POP → YYZ Apr 30, 16:30 UTCApr 30, 19:30 UTC3h 0m
2026-04-30 TSC844 YUL → FLL Apr 30, 11:10 UTCApr 30, 14:20 UTC3h 10m
2026-04-30 TSC823 MCO → YUL Apr 30, 01:20 UTCApr 30, 04:00 UTC2h 40m
2026-04-29 TSC822 YUL → MCO Apr 29, 20:45 UTCApr 29, 23:35 UTC2h 49m
2026-04-29 TSC845 POP → YYZ Apr 29, 16:10 UTCApr 29, 19:05 UTC2h 55m
2026-04-29 TSC844 YUL → FLL Apr 29, 11:05 UTCApr 29, 14:35 UTC3h 30m
2026-04-29 TSC823 MCO → YUL Apr 29, 01:35 UTCApr 29, 04:25 UTC2h 50m
2026-04-28 TSC822 YUL → MCO Apr 28, 20:50 UTCApr 28, 23:50 UTC3h 0m
2026-04-28 TSC845 POP → YYZ Apr 28, 15:55 UTCApr 28, 18:55 UTC3h 0m
2026-04-28 TSC844 YUL → FLL Apr 28, 11:05 UTCApr 28, 14:10 UTC3h 5m

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?
Yes. Mode-S C07721 is currently airborne.
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, TSC845, TSC844, TSC823.