Apparatus

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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 WJA1332 · 40,000 ft
Flights observed
144
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
WJA671 WestJet 4 2026-04-17
WJA4021 WestJet 4 2026-05-04
WJA1531 WestJet 4 2026-05-27
WJA670 WestJet 3 2026-04-17
WJA594 WestJet 3 2026-05-03
WJA1992 - 3 2026-04-14
WJA1831 - 3 2026-04-14
WJA1530 WestJet 3 2026-05-27
WJA119 WestJet 3 2026-04-27
WJA117 WestJet 3 2026-04-24
WJA595 WestJet 2 2026-05-03
WJA538 WestJet 2 2026-05-24
WJA476 WestJet 2 2026-05-08
WJA474 WestJet 2 2026-04-16
WJA473 - 2 2026-04-16
WJA4351 - 2 2026-05-15
WJA4020 WestJet 2 2026-05-04
WJA4011 WestJet 2 2026-05-14
WJA384 WestJet 2 2026-05-22
WJA312 WestJet 2 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 WJA1332 YWG → LAS May 29, 22:10 UTCMay 29, 22:45 UTC35m
2026-05-28 WJA312 YLW → YEG May 28, 22:30 UTCMay 28, 23:35 UTC1h 5m
2026-05-28 WJA312 YLW → YEG May 28, 22:25 UTCMay 29, 02:50 UTC4h 25m
2026-05-28 WJA309 YYC → YQQ May 28, 19:20 UTCMay 28, 20:40 UTC1h 20m
2026-05-27 WJA1531 MSP → YEG May 27, 20:00 UTCMay 27, 22:20 UTC2h 20m
2026-05-27 WJA1530 YEG → MSP May 27, 15:40 UTCMay 27, 17:55 UTC2h 15m
2026-05-26 WJA506 YYJ → YEG May 26, 21:40 UTCMay 26, 22:54 UTC1h 15m
2026-05-26 WJA505 YYZ → YXE May 26, 19:05 UTCMay 26, 20:24 UTC1h 20m
2026-05-26 WJA526 YLW → YEG May 26, 16:15 UTCMay 26, 17:05 UTC50m
2026-05-25 WJA151 YEG → YYC May 25, 22:34 UTCMay 26, 20:24 UTC21h 51m
2026-05-25 WJA484 YEG → YWG May 25, 15:10 UTCMay 26, 15:00 UTC23h 50m
2026-05-25 WJA150 YYC → YEG May 25, 02:56 UTCMay 25, 23:19 UTC20h 24m
2026-05-25 WJA150 YYC → YEG May 25, 03:00 UTCMay 25, 03:25 UTC25m
2026-05-24 WJA231 YHZ → YYC May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-24 WJA538 YVR → YWG May 24, 17:00 UTCMay 24, 19:25 UTC2h 25m
2026-05-23 WJA2151 PVR → YVR May 23, 16:50 UTCMay 24, 04:00 UTC11h 11m
2026-05-22 WJA384 YWG → YYZ May 22, 21:40 UTCMay 22, 23:00 UTC1h 20m
2026-05-22 WJA384 YWG → YYZ May 22, 21:39 UTCMay 23, 19:45 UTC22h 7m
2026-05-22 WJA538 YVR → YWG May 22, 16:55 UTCMay 22, 19:25 UTC2h 30m
2026-05-21 WJA1103 LAX → YYZ May 21, 19:35 UTCMay 21, 22:10 UTC2h 35m
2026-05-21 WJA1103 LAX → YYZ May 21, 19:33 UTCMay 22, 19:00 UTC23h 28m
2026-05-21 WJA1102 YYZ → LAX May 21, 15:40 UTCMay 21, 18:00 UTC2h 20m
2026-05-20 WJA116 YVR → YYC May 20, 21:20 UTCMay 21, 21:00 UTC23h 41m
2026-05-20 WJA115 YYC → YVR May 20, 18:37 UTCMay 21, 17:00 UTC22h 24m
2026-05-20 WJA192 YYJ → YEG May 20, 01:28 UTCMay 21, 01:00 UTC23h 33m
2026-05-19 WJA189 YEG → YLW May 19, 22:49 UTCMay 20, 20:05 UTC21h 17m
2026-05-19 WJA107 YYC → YVR May 19, 14:49 UTCMay 20, 02:20 UTC11h 31m
2026-05-19 WJA282 YYJ → YYC May 19, 03:29 UTCMay 20, 02:20 UTC22h 51m
2026-05-18 WJA344 YMM → YYC May 18, 20:45 UTCMay 18, 21:00 UTC15m
2026-05-18 WJA266 YEG → YYC May 18, 17:50 UTCMay 18, 19:10 UTC1h 19m
2026-05-18 WJA266 YEG → YYC May 18, 17:48 UTCMay 19, 16:15 UTC22h 27m
2026-05-18 WJA263 YXE → YYC May 18, 15:25 UTCMay 18, 16:35 UTC1h 10m
2026-05-18 WJA343 YQT → YYC May 18, 12:05 UTCMay 18, 13:05 UTC1h 0m
2026-05-17 WJA600 YYC → YXE May 17, 17:10 UTCMay 18, 16:35 UTC23h 26m
2026-05-17 WJA873 YHZ → YXE May 17, 00:45 UTCMay 17, 23:00 UTC22h 16m
2026-05-16 WJA872 YXE → YHZ May 16, 19:28 UTCMay 17, 17:01 UTC21h 33m
2026-05-16 WJA601 YXE → YYC May 16, 13:30 UTCMay 17, 05:30 UTC16h 1m
2026-05-15 WJA4351 - May 15, 19:50 UTCMay 15, 20:05 UTC15m
2026-05-15 WJA4351 - May 15, 19:16 UTCMay 16, 15:01 UTC19h 45m
2026-05-15 WJA4012 YEG → YFI May 15, 01:00 UTCMay 15, 01:10 UTC10m
2026-05-14 WJA4011 YFI → YEG May 14, 02:55 UTCMay 15, 01:00 UTC22h 6m
2026-05-13 WJA1531 MSP → YEG May 13, 20:00 UTCMay 13, 22:35 UTC2h 35m
2026-05-13 WJA1531 MSP → YEG May 13, 19:59 UTCMay 14, 03:50 UTC7h 52m
2026-05-13 WJA1530 YEG → MSP May 13, 15:55 UTCMay 13, 18:05 UTC2h 10m
2026-05-13 WJA4011 YFI → YEG May 13, 01:05 UTCMay 13, 04:10 UTC3h 5m
2026-05-12 WJA1531 MSP → YEG May 12, 20:05 UTCMay 12, 22:45 UTC2h 40m
2026-05-12 WJA1530 YEG → MSP May 12, 15:55 UTCMay 12, 18:05 UTC2h 10m
2026-05-10 WJA1473 LAS → YEG May 10, 16:55 UTCMay 10, 19:40 UTC2h 45m
2026-05-10 WJA1473 LAS → YEG May 10, 16:52 UTCMay 11, 05:55 UTC13h 3m
2026-05-10 WJA1472 YEG → LAS May 10, 13:05 UTCMay 10, 15:35 UTC2h 30m

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 WJA671, WJA4021, WJA1531, WJA670, WJA594.