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sensors Mode-S transponder

C03C04

ICAO 24-bit transponder address · allocated to Canada

Currently assigned to C-FWSX · BOEING 737-700 · operated by Westjet

Hex
C03C04
Octal
60036004
Decimal
12,598,276
Country
CA
Tail
C-FWSX
Type
B737
Broadcasting now · callsign WJA585 · 38,000 ft
Flights observed
282
Distinct callsigns
20
Country
CA
Last broadcast
1h ago

Current position

C03C04 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address C03C04 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
WJA145 - 5 2026-07-04
WJA671 WestJet 4 2026-04-17
WJA484 - 4 2026-06-23
WJA4021 WestJet 4 2026-05-04
WJA159 WestJet 4 2026-06-28
WJA1531 WestJet 4 2026-05-27
WJA1485 - 4 2026-07-04
WJA1484 - 4 2026-07-04
WJA670 WestJet 3 2026-04-17
WJA600 WestJet 3 2026-06-12
WJA594 WestJet 3 2026-05-03
WJA483 - 3 2026-07-04
WJA475 - 3 2026-07-01
WJA228 - 3 2026-06-25
WJA1992 - 3 2026-04-14
WJA186 - 3 2026-06-30
WJA1831 - 3 2026-04-14
WJA1620 - 3 2026-07-09
WJA1552 - 3 2026-07-12
WJA1541 - 3 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 WJA585 - Jul 14, 00:50 UTCJul 14, 03:00 UTC2h 10m
2026-07-13 WJA582 - Jul 13, 20:20 UTCJul 13, 23:25 UTC3h 5m
2026-07-12 WJA272 - Jul 12, 20:10 UTCJul 12, 21:00 UTC50m
2026-07-12 WJA272 YYJ → YYC Jul 12, 20:10 UTCJul 13, 02:15 UTC6h 6m
2026-07-12 WJA265 - Jul 12, 17:50 UTCJul 12, 19:10 UTC1h 20m
2026-07-12 WJA1555 SEA → YYC Jul 12, 02:55 UTCJul 12, 03:55 UTC1h 0m
2026-07-12 WJA1552 YYC → SEA Jul 12, 00:05 UTCJul 12, 01:25 UTC1h 20m
2026-07-11 WJA552 - Jul 11, 20:05 UTCJul 11, 21:05 UTC1h 0m
2026-07-11 WJA553 YYC → YCD Jul 11, 17:35 UTCJul 11, 18:55 UTC1h 20m
2026-07-11 WJA264 - Jul 11, 15:00 UTCJul 11, 16:00 UTC1h 0m
2026-07-11 WJA501 - Jul 11, 12:15 UTCJul 11, 13:45 UTC1h 30m
2026-07-10 WJA581 - Jul 10, 19:45 UTCJul 11, 01:00 UTC5h 15m
2026-07-09 WJA1620 YYC → DTW Jul 9, 17:15 UTCJul 9, 20:20 UTC3h 5m
2026-07-09 WJA1620 YYC → DTW Jul 9, 17:13 UTCJul 9, 23:50 UTC6h 38m
2026-07-09 WJA1541 - Jul 9, 11:40 UTCJul 9, 15:30 UTC3h 50m
2026-07-08 WJA1542 - Jul 8, 23:50 UTCJul 9, 03:30 UTC3h 40m
2026-07-08 WJA641 YYZ → YYC Jul 8, 17:40 UTCJul 8, 21:35 UTC3h 55m
2026-07-08 WJA626 YYC → YYZ Jul 8, 12:10 UTCJul 8, 15:25 UTC3h 15m
2026-07-07 WJA1541 - Jul 7, 11:40 UTCJul 7, 15:00 UTC3h 20m
2026-07-07 WJA1541 IAH → YYC Jul 7, 11:35 UTCJul 8, 01:15 UTC13h 41m
2026-07-06 WJA1542 - Jul 6, 23:45 UTCJul 7, 03:20 UTC3h 35m
2026-07-06 WJA641 - Jul 6, 17:45 UTCJul 6, 21:35 UTC3h 50m
2026-07-05 WJA1051 - Jul 5, 21:40 UTCJul 5, 23:35 UTC1h 55m
2026-07-05 WJA1051 DTW → YHZ Jul 5, 21:37 UTCJul 6, 21:00 UTC23h 24m
2026-07-05 WJA1620 - Jul 5, 17:15 UTCJul 5, 20:20 UTC3h 5m
2026-07-04 WJA1485 - Jul 4, 22:30 UTCJul 5, 01:15 UTC2h 45m
2026-07-04 WJA1484 - Jul 4, 17:55 UTCJul 4, 20:45 UTC2h 50m
2026-07-04 WJA145 - Jul 4, 15:15 UTCJul 4, 15:45 UTC30m
2026-07-04 WJA483 YWG → YEG Jul 4, 12:00 UTCJul 4, 13:50 UTC1h 50m
2026-07-03 WJA342 YYC → YXE Jul 3, 15:36 UTCJul 4, 13:55 UTC22h 20m
2026-07-03 WJA342 YYC → YXE Jul 3, 15:40 UTCJul 3, 16:30 UTC50m
2026-07-03 WJA182 - Jul 3, 13:15 UTCJul 3, 14:00 UTC45m
2026-07-03 WJA193 - Jul 3, 04:20 UTCJul 3, 05:05 UTC45m
2026-07-02 WJA1485 - Jul 2, 22:40 UTCJul 3, 01:30 UTC2h 50m
2026-07-02 WJA1484 - Jul 2, 18:00 UTCJul 2, 21:00 UTC3h 0m
2026-07-02 WJA145 - Jul 2, 15:10 UTCJul 2, 15:50 UTC40m
2026-07-01 WJA475 YYC → YXX Jul 1, 20:46 UTCJul 2, 19:00 UTC22h 15m
2026-07-01 WJA475 - Jul 1, 20:50 UTCJul 1, 21:50 UTC1h 0m
2026-07-01 WJA110 - Jul 1, 17:45 UTCJul 1, 18:50 UTC1h 5m
2026-07-01 WJA107 YYC → YVR Jul 1, 14:25 UTCJul 1, 15:35 UTC1h 10m
2026-07-01 WJA585 - Jul 1, 00:50 UTCJul 1, 04:35 UTC3h 45m
2026-06-30 WJA582 - Jun 30, 20:15 UTCJun 30, 23:35 UTC3h 20m
2026-06-30 WJA186 - Jun 30, 18:00 UTCJun 30, 18:45 UTC45m
2026-06-30 WJA183 - Jun 30, 16:00 UTCJun 30, 16:45 UTC45m
2026-06-29 WJA348 YYC → YXE Jun 29, 04:04 UTCJun 29, 05:00 UTC55m
2026-06-29 WJA348 YYC → YXE Jun 29, 04:04 UTCJun 29, 14:19 UTC10h 16m
2026-06-28 WJA1049 - Jun 28, 21:55 UTCJun 29, 01:14 UTC3h 20m
2026-06-28 WJA1640 YYC → ANC Jun 28, 17:00 UTCJun 28, 20:14 UTC3h 15m
2026-06-28 WJA159 YEG → YYC Jun 28, 13:49 UTCJun 28, 14:19 UTC30m
2026-06-27 WJA159 YEG → YYC Jun 27, 13:49 UTCJun 27, 14:25 UTC35m

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

Mode-S C03C04 frequently asked

What is Mode-S code C03C04?
C03C04 is an ICAO 24-bit transponder address. Allocated to Canada. Assigned to C-FWSX.
Where is Mode-S C03C04 registered?
Mode-S code C03C04 is allocated to Canada (CA). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is C03C04 broadcasting right now?
Yes. Mode-S C03C04 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex C03C04, octal 60036004, decimal 12,598,276.
What flights does C03C04 operate?
Mode-S C03C04 has broadcast 20 distinct callsigns, including WJA145, WJA671, WJA484, WJA4021, WJA159.